mirror of
https://github.com/MariaDB/server.git
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b9f5793176
Two new variables added: - max_tmp_space_usage : Limits the the temporary space allowance per user - max_total_tmp_space_usage: Limits the temporary space allowance for all users. New status variables: tmp_space_used & max_tmp_space_used New field in information_schema.process_list: TMP_SPACE_USED The temporary space is counted for: - All SQL level temporary files. This includes files for filesort, transaction temporary space, analyze, binlog_stmt_cache etc. It does not include engine internal temporary files used for repair, alter table, index pre sorting etc. - All internal on disk temporary tables created as part of resolving a SELECT, multi-source update etc. Special cases: - When doing a commit, the last flush of the binlog_stmt_cache will not cause an error even if the temporary space limit is exceeded. This is to avoid giving errors on commit. This means that a user can temporary go over the limit with up to binlog_stmt_cache_size. Noteworthy issue: - One has to be careful when using small values for max_tmp_space_limit together with binary logging and with non transactional tables. If a the binary log entry for the query is bigger than binlog_stmt_cache_size and one hits the limit of max_tmp_space_limit when flushing the entry to disk, the query will abort and the binary log will not contain the last changes to the table. This will also stop the slave! This is also true for all Aria tables as Aria cannot do rollback (except in case of crashes)! One way to avoid it is to use @@binlog_format=statement for queries that updates a lot of rows. Implementation: - All writes to temporary files or internal temporary tables, that increases the file size, are routed through temp_file_size_cb_func() which updates and checks the temp space usage. - Most of the temporary file monitoring is done inside IO_CACHE. Temporary file monitoring is done inside the Aria engine. - MY_TRACK and MY_TRACK_WITH_LIMIT are new flags for ini_io_cache(). MY_TRACK means that we track the file usage. TRACK_WITH_LIMIT means that we track the file usage and we give an error if the limit is breached. This is used to not give an error on commit when binlog_stmp_cache is flushed. - global_tmp_space_used contains the total tmp space used so far. This is needed quickly check against max_total_tmp_space_usage. - Temporary space errors are using EE_LOCAL_TMP_SPACE_FULL and handler errors are using HA_ERR_LOCAL_TMP_SPACE_FULL. This is needed until we move general errors to it's own error space so that they cannot conflict with system error numbers. - Return value of my_chsize() and mysql_file_chsize() has changed so that -1 is returned in the case my_chsize() could not decrease the file size (very unlikely and will not happen on modern systems). All calls to _chsize() are updated to check for > 0 as the error condition. - At the destruction of THD we check that THD::tmp_file_space == 0 - At server end we check that global_tmp_space_used == 0 - As a precaution against errors in the tmp_space_used code, one can set max_tmp_space_usage and max_total_tmp_space_usage to 0 to disable the tmp space quota errors. - truncate_io_cache() function added. - Aria tables using static or dynamic row length are registered in 8K increments to avoid some calls to update_tmp_file_size(). Other things: - Ensure that all handler errors are registered. Before, some engine errors could be printed as "Unknown error". - Fixed bug in filesort() that causes a assert if there was an error when writing to the temporay file. - Fixed that compute_window_func() now takes into account write errors. - In case of parallel replication, rpl_group_info::cleanup_context() could call trans_rollback() with thd->error set, which would cause an assert. Fixed by resetting the error before calling trans_rollback(). - Fixed bug in subselect3.inc which caused following test to use heap tables with low value for max_heap_table_size - Fixed bug in sql_expression_cache where it did not overflow heap table to Aria table. - Added Max_tmp_disk_space_used to slow query log. - Fixed some bugs in log_slow_innodb.test
519 lines
14 KiB
Text
519 lines
14 KiB
Text
set @old_concurrent_insert= @@global.concurrent_insert;
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set @@global.concurrent_insert= 0;
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SET @old_log_output = @@global.log_output;
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SET GLOBAL LOG_OUTPUT = 'FILE';
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connect con1,localhost,root,,;
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connect con2,localhost,root,,;
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connection default;
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flush global status;
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show status like 'Table_lock%';
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Variable_name Value
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Table_locks_immediate 0
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Table_locks_waited 0
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select * from information_schema.session_status where variable_name like 'Table_lock%';
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VARIABLE_NAME VARIABLE_VALUE
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TABLE_LOCKS_IMMEDIATE 0
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TABLE_LOCKS_WAITED 0
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set sql_log_bin=0;
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set @old_general_log = @@global.general_log;
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set global general_log = 'OFF';
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drop table if exists t1;
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create table t1(n int) engine=myisam;
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insert into t1 values(1);
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select get_lock('mysqltest_lock', 100);
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get_lock('mysqltest_lock', 100)
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1
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connection con2;
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# Sending:
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update t1 set n = get_lock('mysqltest_lock', 100);
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connection con1;
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# Wait for the first UPDATE to get blocked.
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# Sending:
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update t1 set n = 3;
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connection default;
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# wait for the second UPDATE to get blocked
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select release_lock('mysqltest_lock');
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release_lock('mysqltest_lock')
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1
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connection con2;
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# Reaping first UPDATE
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select release_lock('mysqltest_lock');
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release_lock('mysqltest_lock')
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1
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connection con1;
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# Reaping second UPDATE
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show status like 'Table_locks_waited';
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Variable_name Value
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Table_locks_waited 1
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connection default;
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drop table t1;
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set global general_log = @old_general_log;
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disconnect con2;
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disconnect con1;
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select 1;
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1
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1
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show status like 'last_query_cost';
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Variable_name Value
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Last_query_cost 0.000000
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create table t1 (a int);
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insert into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10);
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insert into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10);
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insert into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10);
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insert into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10);
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insert into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10);
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select * from t1 where a=6;
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a
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6
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6
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6
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6
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6
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show status like 'last_query_cost';
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Variable_name Value
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Last_query_cost 0.017856
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show status like 'last_query_cost';
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Variable_name Value
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Last_query_cost 0.017856
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select 1;
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1
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1
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show status like 'last_query_cost';
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Variable_name Value
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Last_query_cost 0.000000
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drop table t1;
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FLUSH GLOBAL STATUS;
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SHOW STATUS LIKE 'max_used_connections';
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Variable_name Value
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Max_used_connections 1
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SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'max_used_connections';
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VARIABLE_NAME VARIABLE_VALUE
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MAX_USED_CONNECTIONS 1
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SET @save_thread_cache_size=@@thread_cache_size;
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SET GLOBAL thread_cache_size=3;
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connect con1,localhost,root,,;
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connect con2,localhost,root,,;
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connection con1;
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disconnect con2;
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SHOW STATUS LIKE 'max_used_connections';
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Variable_name Value
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Max_used_connections 3
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SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'max_used_connections';
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VARIABLE_NAME VARIABLE_VALUE
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MAX_USED_CONNECTIONS 3
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FLUSH GLOBAL STATUS;
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SHOW STATUS LIKE 'max_used_connections';
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Variable_name Value
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Max_used_connections 2
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SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'max_used_connections';
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VARIABLE_NAME VARIABLE_VALUE
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MAX_USED_CONNECTIONS 2
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connect con2,localhost,root,,;
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SHOW STATUS LIKE 'max_used_connections';
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Variable_name Value
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Max_used_connections 3
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SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'max_used_connections';
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VARIABLE_NAME VARIABLE_VALUE
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MAX_USED_CONNECTIONS 3
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connect con3,localhost,root,,;
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SHOW STATUS LIKE 'max_used_connections';
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Variable_name Value
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Max_used_connections 4
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SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'max_used_connections';
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VARIABLE_NAME VARIABLE_VALUE
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MAX_USED_CONNECTIONS 4
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connection default;
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SET GLOBAL thread_cache_size=@save_thread_cache_size;
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disconnect con3;
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disconnect con2;
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disconnect con1;
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CREATE TABLE t1 ( a INT );
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INSERT INTO t1 VALUES (1), (2);
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SELECT a FROM t1 LIMIT 1;
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a
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1
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SHOW SESSION STATUS LIKE 'Last_query_cost';
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Variable_name Value
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Last_query_cost 0.010348
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EXPLAIN SELECT a FROM t1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 2
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SHOW SESSION STATUS LIKE 'Last_query_cost';
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Variable_name Value
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Last_query_cost 0.010348
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SELECT a FROM t1 UNION SELECT a FROM t1 ORDER BY a;
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a
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1
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2
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SHOW SESSION STATUS LIKE 'Last_query_cost';
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Variable_name Value
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Last_query_cost 0.010348
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EXPLAIN SELECT a FROM t1 UNION SELECT a FROM t1 ORDER BY a;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 2
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2 UNION t1 ALL NULL NULL NULL NULL 2
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NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL Using filesort
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SHOW SESSION STATUS LIKE 'Last_query_cost';
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Variable_name Value
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Last_query_cost 0.010348
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SELECT a IN (SELECT a FROM t1) FROM t1 LIMIT 1;
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a IN (SELECT a FROM t1)
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1
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SHOW SESSION STATUS LIKE 'Last_query_cost';
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Variable_name Value
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Last_query_cost 0.010348
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SELECT (SELECT a FROM t1 LIMIT 1) x FROM t1 LIMIT 1;
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x
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1
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SHOW SESSION STATUS LIKE 'Last_query_cost';
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Variable_name Value
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Last_query_cost 0.010348
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SELECT * FROM t1 a, t1 b LIMIT 1;
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a a
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1 1
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SHOW SESSION STATUS LIKE 'Last_query_cost';
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Variable_name Value
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Last_query_cost 0.021190
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DROP TABLE t1;
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connect con1,localhost,root,,;
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show status like 'com_show_status';
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Variable_name Value
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Com_show_status 3
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show status like 'hand%write%';
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Variable_name Value
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Handler_tmp_write 0
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Handler_write 0
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show status like '%\_tmp%';
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Variable_name Value
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Created_tmp_disk_tables 0
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Created_tmp_files 0
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Created_tmp_tables 0
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Handler_tmp_delete 0
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Handler_tmp_update 0
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Handler_tmp_write 0
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Max_tmp_space_used 0
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Rows_tmp_read 5
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show status like 'hand%write%';
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Variable_name Value
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Handler_tmp_write 0
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Handler_write 0
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show status like '%\_tmp%';
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Variable_name Value
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Created_tmp_disk_tables 0
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Created_tmp_files 0
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Created_tmp_tables 0
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Handler_tmp_delete 0
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Handler_tmp_update 0
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Handler_tmp_write 0
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Max_tmp_space_used 0
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Rows_tmp_read 15
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show status like 'com_show_status';
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Variable_name Value
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Com_show_status 8
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rnd_diff tmp_table_diff
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32 8
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disconnect con1;
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connection default;
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flush status;
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show status like 'Com%function';
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Variable_name Value
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Com_alter_function 0
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Com_create_function 0
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Com_drop_function 0
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create function f1 (x INTEGER) returns integer
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begin
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declare ret integer;
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set ret = x * 10;
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return ret;
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end //
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drop function f1;
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show status like 'Com%function';
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Variable_name Value
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Com_alter_function 0
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Com_create_function 1
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Com_drop_function 1
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connect root, localhost, root,,test;
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connection root;
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create database db37908;
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create table db37908.t1(f1 int);
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insert into db37908.t1 values(1);
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create user mysqltest_1@localhost;
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grant usage,execute on test.* to mysqltest_1@localhost;
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create procedure proc37908() begin select 1; end |
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create function func37908() returns int sql security invoker
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return (select * from db37908.t1 limit 1)|
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connect user1,localhost,mysqltest_1,,test;
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connection user1;
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select * from db37908.t1;
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ERROR 42000: SELECT command denied to user 'mysqltest_1'@'localhost' for table `db37908`.`t1`
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show status where variable_name ='uptime' and 2 in (select * from db37908.t1);
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ERROR 42000: SELECT command denied to user 'mysqltest_1'@'localhost' for table `db37908`.`t1`
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show procedure status where name ='proc37908' and 1 in (select f1 from db37908.t1);
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ERROR 42000: SELECT command denied to user 'mysqltest_1'@'localhost' for table `db37908`.`t1`
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show function status where name ='func37908' and 1 in (select func37908());
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ERROR 42000: SELECT command denied to user 'mysqltest_1'@'localhost' for table `db37908`.`t1`
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connection default;
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disconnect user1;
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disconnect root;
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drop database db37908;
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drop procedure proc37908;
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drop function func37908;
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REVOKE ALL PRIVILEGES, GRANT OPTION FROM mysqltest_1@localhost;
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DROP USER mysqltest_1@localhost;
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connect con1,localhost,root,,;
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connection con1;
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DROP PROCEDURE IF EXISTS p1;
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DROP FUNCTION IF EXISTS f1;
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CREATE FUNCTION f1() RETURNS INTEGER
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BEGIN
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DECLARE foo INTEGER;
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DECLARE bar INTEGER;
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SET foo=1;
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SET bar=2;
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RETURN foo;
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END $$
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CREATE PROCEDURE p1()
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BEGIN
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SELECT 1;
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END $$
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SELECT f1();
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f1()
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1
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CALL p1();
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1
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1
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SELECT 9;
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9
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9
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disconnect con1;
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connection default;
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DROP PROCEDURE p1;
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DROP FUNCTION f1;
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flush status;
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create table t1 (a int not null auto_increment primary key, g int, b blob);
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insert into t1 (g,b) values (1,'a'), (2, 'b'), (3, 'b'), (1, 'c');
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select * from t1;
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a g b
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1 1 a
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2 2 b
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3 3 b
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4 1 c
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select b, count(*) from t1 group by b;
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b count(*)
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a 1
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b 2
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c 1
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select g, count(*) from t1 group by g;
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g count(*)
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1 2
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2 1
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3 1
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show status like 'Row%';
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Variable_name Value
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Rows_read 12
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Rows_sent 10
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Rows_tmp_read 14
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show status like 'Handler%';
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Variable_name Value
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Handler_commit 0
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Handler_delete 0
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Handler_discover 0
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Handler_external_lock 0
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Handler_icp_attempts 0
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Handler_icp_match 0
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Handler_mrr_init 0
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Handler_mrr_key_refills 0
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Handler_mrr_rowid_refills 0
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Handler_prepare 0
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Handler_read_first 0
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Handler_read_key 9
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Handler_read_last 0
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Handler_read_next 0
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Handler_read_prev 0
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Handler_read_retry 0
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Handler_read_rnd 7
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Handler_read_rnd_deleted 0
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Handler_read_rnd_next 23
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Handler_rollback 0
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Handler_savepoint 0
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Handler_savepoint_rollback 0
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Handler_tmp_delete 0
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Handler_tmp_update 2
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Handler_tmp_write 7
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Handler_update 0
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Handler_write 4
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show status like '%_tmp%';
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Variable_name Value
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Created_tmp_disk_tables 1
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Created_tmp_files 0
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Created_tmp_tables 2
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Handler_tmp_delete 0
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Handler_tmp_update 2
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Handler_tmp_write 7
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Max_tmp_space_used 32768
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Rows_tmp_read 44
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drop table t1;
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CREATE TABLE t1 (i int(11) DEFAULT NULL, KEY i (i) ) ENGINE=MyISAM;
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insert into t1 values (1),(2),(3),(4),(5);
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flush status;
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select * from t1 where i=5 union select * from t1 where i=5;
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i
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5
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show status like "handler%";
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Variable_name Value
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Handler_commit 0
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Handler_delete 0
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Handler_discover 0
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Handler_external_lock 0
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Handler_icp_attempts 0
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Handler_icp_match 0
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Handler_mrr_init 0
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Handler_mrr_key_refills 0
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Handler_mrr_rowid_refills 0
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Handler_prepare 0
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Handler_read_first 0
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Handler_read_key 2
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Handler_read_last 0
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Handler_read_next 2
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Handler_read_prev 0
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Handler_read_retry 0
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Handler_read_rnd 0
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Handler_read_rnd_deleted 1
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Handler_read_rnd_next 2
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Handler_rollback 0
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Handler_savepoint 0
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Handler_savepoint_rollback 0
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Handler_tmp_delete 0
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Handler_tmp_update 0
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Handler_tmp_write 2
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Handler_update 0
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Handler_write 0
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drop table t1;
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#
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# MDEV-11153 - Introduce status variables for table cache monitoring and
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# tuning
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#
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SET @old_table_open_cache= @@table_open_cache;
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SET @@global.table_open_cache=10;
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FLUSH TABLES;
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FLUSH STATUS;
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SHOW STATUS LIKE 'Table_open_cache%';
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Variable_name Value
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Table_open_cache_active_instances 1
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Table_open_cache_hits 0
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Table_open_cache_misses 0
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Table_open_cache_overflows 0
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SHOW STATUS LIKE 'Table_open_cache%';
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Variable_name Value
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Table_open_cache_active_instances 1
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Table_open_cache_hits 72
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Table_open_cache_misses 18
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Table_open_cache_overflows 8
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FLUSH TABLES;
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FLUSH STATUS;
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SET @@global.table_open_cache= @old_table_open_cache;
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#
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# MDEV-14505 - Threads_running becomes scalability bottleneck
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#
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# Session status for Threads_running is currently always 1.
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SHOW STATUS LIKE 'Threads_running';
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Variable_name Value
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Threads_running 1
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SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME='THREADS_RUNNING';
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VARIABLE_VALUE
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1
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FLUSH STATUS;
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SHOW STATUS LIKE 'Threads_running';
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Variable_name Value
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Threads_running 1
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SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME='THREADS_RUNNING';
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VARIABLE_VALUE
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1
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#
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# MDEV-15915 Add Feature_json status variable.
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#
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SHOW STATUS LIKE 'Feature_json';
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Variable_name Value
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Feature_json 0
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select json_valid('123');
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json_valid('123')
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1
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SHOW STATUS LIKE 'Feature_json';
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Variable_name Value
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Feature_json 1
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select * from json_table ('{}', '$' COLUMNS(x FOR ORDINALITY)) a;
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x
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1
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SHOW STATUS LIKE 'Feature_json';
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Variable_name Value
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Feature_json 2
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connection default;
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set @@global.concurrent_insert= @old_concurrent_insert;
|
|
SET GLOBAL log_output = @old_log_output;
|
|
#
|
|
# MDEV-30543 New status variable: Max_used_connections_time
|
|
#
|
|
FLUSH GLOBAL STATUS;
|
|
connect con1,localhost,root,,;
|
|
connect con2,localhost,root,,;
|
|
connection con1;
|
|
disconnect con2;
|
|
SELECT 'DTVALUE' = 'DTVALUE' AS expect_1;
|
|
expect_1
|
|
1
|
|
connect con3,localhost,root,,;
|
|
connect con4,localhost,root,,;
|
|
SELECT 'DTVALUE' < 'DTVALUE' as expect_1;
|
|
expect_1
|
|
1
|
|
disconnect con4;
|
|
disconnect con3;
|
|
disconnect con1;
|
|
connection default;
|
|
# Test Uptime_since_flush_status
|
|
# All results below should be 1
|
|
flush global status;
|
|
flush session status;
|
|
select $global_flush_status >= $local_flush_status as "1";
|
|
1
|
|
1
|
|
flush session status;
|
|
select $new_global_flush_status >= $global_flush_status as "1";
|
|
1
|
|
1
|
|
select $new_local_flush_status < $global_flush_status as "1";
|
|
1
|
|
1
|
|
flush global status;
|
|
select $new_local_flush_status >= $local_flush_status as "1";
|
|
1
|
|
1
|
|
select $new_global_flush_status < $new_local_flush_status as "1";
|
|
1
|
|
1
|
|
create or replace table t1 (a int, key(a)) engine=MyISAM;
|
|
insert into t1 values (1),(2);
|
|
connect con1,localhost,root;
|
|
set old_mode=OLD_FLUSH_STATUS;
|
|
Warnings:
|
|
Warning 1287 'OLD_FLUSH_STATUS' is deprecated and will be removed in a future release
|
|
insert into t1 values (3),(4);
|
|
drop table t1;
|
|
select t1.variable_name, t1.variable_value as global_value, t2.variable_value as session_value
|
|
from information_schema.global_status t1 join information_schema.session_status t2
|
|
on t1.variable_name = t2.variable_name
|
|
where t1.variable_name in ('Key_writes','Com_insert');
|
|
variable_name global_value session_value
|
|
COM_INSERT 2 1
|
|
KEY_WRITES 2 2
|
|
flush status;
|
|
select t1.variable_name, t1.variable_value as global_value, t2.variable_value as session_value
|
|
from information_schema.global_status t1 join information_schema.session_status t2
|
|
on t1.variable_name = t2.variable_name
|
|
where t1.variable_name in ('Key_writes','Com_insert');
|
|
variable_name global_value session_value
|
|
COM_INSERT 2 0
|
|
KEY_WRITES 0 0
|
|
disconnect con1;
|
|
connection default;
|
|
# end of 11.5 tests
|