mirror of
https://github.com/MariaDB/server.git
synced 2025-10-27 00:48:30 +01:00
286 lines
10 KiB
Text
286 lines
10 KiB
Text
set global query_cache_type= ON;
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set @save_query_cache_size=@@global.query_cache_size;
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SET @save_concurrent_insert= @@GLOBAL.concurrent_insert;
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flush status;
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set query_cache_type=DEMAND;
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set global query_cache_size= 1024*768;
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drop table if exists t1;
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create table t1 (a varchar(100));
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insert into t1 values ('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'),('bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb');
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connect bug30887con1, localhost, root, ,test;
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connect bug30887con2, localhost, root, ,test;
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connection bug30887con1;
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Activate debug hook and attempt to retrieve the statement from the cache.
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set debug_sync="wait_in_query_cache_insert SIGNAL parked WAIT_FOR go";
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select SQL_CACHE * from t1;;
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connection default;
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set debug_sync="now WAIT_FOR parked";
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connection bug30887con2;
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clear the query cache.
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show status like 'Qcache_queries_in_cache';
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Variable_name Value
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Qcache_queries_in_cache 1
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set global query_cache_size= 0;
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connection default;
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Signal the debug hook to release the lock.
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set debug_sync="now SIGNAL go";
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Show query cache status.
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show status like 'Qcache_queries_in_cache';
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Variable_name Value
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Qcache_queries_in_cache 0
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connection bug30887con1;
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a
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aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
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disconnect bug30887con1;
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disconnect bug30887con2;
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connection default;
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set debug_sync= 'RESET';
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set global query_cache_size= 0;
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use test;
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drop table t1;
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DROP TABLE IF EXISTS t1, t2;
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CREATE TABLE t1 (a INT);
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CREATE TABLE t2 (a INT);
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INSERT INTO t1 VALUES (1),(2),(3);
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SET GLOBAL concurrent_insert= 1;
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SET GLOBAL query_cache_size= 1024*512;
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SET GLOBAL query_cache_type= ON;
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connect con1,localhost,root,,test,,;
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connect con2,localhost,root,,test,,;
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connection con1;
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SET DEBUG_SYNC = "wait_after_query_cache_invalidate SIGNAL parked WAIT_FOR go";
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# Send concurrent insert, will wait in the query cache table invalidate
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INSERT INTO t1 VALUES (4);
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connection default;
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# Wait for concurrent insert to reach the debug point
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SET DEBUG_SYNC = "now WAIT_FOR parked";
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connection con2;
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# Send SELECT that shouldn't be cached
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SELECT * FROM t1;
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a
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1
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2
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3
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connection default;
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# Notify the concurrent insert to proceed
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SET DEBUG_SYNC = "now SIGNAL go";
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connection con1;
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# Gather insert result
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SHOW STATUS LIKE "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 0
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# Test that it's cacheable
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SELECT * FROM t1;
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a
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1
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2
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3
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4
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SHOW STATUS LIKE "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 1
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disconnect con1;
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disconnect con2;
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connection default;
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# Restore defaults
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SET DEBUG_SYNC= 'RESET';
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RESET QUERY CACHE;
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DROP TABLE t1,t2;
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SET GLOBAL concurrent_insert= DEFAULT;
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SET GLOBAL query_cache_size= DEFAULT;
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SET GLOBAL query_cache_type= DEFAULT;
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#
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# Bug43758 Query cache can lock up threads in 'freeing items' state
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#
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FLUSH STATUS;
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SET GLOBAL query_cache_type=DEMAND;
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SET GLOBAL query_cache_size= 1024*768;
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DROP TABLE IF EXISTS t1,t2,t3,t4,t5;
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CREATE TABLE t1 (a VARCHAR(100));
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CREATE TABLE t2 (a VARCHAR(100));
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CREATE TABLE t3 (a VARCHAR(100));
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CREATE TABLE t4 (a VARCHAR(100));
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CREATE TABLE t5 (a VARCHAR(100));
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INSERT INTO t1 VALUES ('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'),('bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb');
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INSERT INTO t2 VALUES ('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'),('bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb');
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INSERT INTO t3 VALUES ('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'),('bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb');
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INSERT INTO t4 VALUES ('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'),('bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb');
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INSERT INTO t5 VALUES ('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'),('bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb');
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connect thd2, localhost, root, ,test;
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connect thd3, localhost, root, ,test;
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connect thd1, localhost, root, ,test;
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connection thd1;
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**
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** Load Query Cache with a result set and one table.
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**
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SELECT SQL_CACHE * FROM t1;
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a
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aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
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*************************************************************************
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** We want to accomplish the following state:
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** - Query cache status: TABLE_FLUSH_IN_PROGRESS
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** - THD1: invalidate_table_internal (iterating query blocks)
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** - THD2: query_cache_insert (cond_wait)
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** - THD3: query_cache_insert (cond_wait)
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** - No thread should be holding the structure_guard_mutex.
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**
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** First step is to place a DELETE-statement on the debug hook just
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** before the mutex lock in invalidate_table_internal.
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** This will allow new result sets to be written into the QC.
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**
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SET DEBUG_SYNC="wait_in_query_cache_invalidate1 SIGNAL parked1_1 WAIT_FOR go1_1";
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SET DEBUG_SYNC="wait_in_query_cache_invalidate2 SIGNAL parked1_2 WAIT_FOR go1_2";
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DELETE FROM t1 WHERE a like '%a%';;
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connection default;
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** Assert that the expect process status is obtained.
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SET DEBUG_SYNC="now WAIT_FOR parked1_1";
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**
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connection thd2;
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** On THD2: Insert a result into the cache. This attempt will be blocked
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** because of a debug hook placed just before the mutex lock after which
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** the first part of the result set is written.
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SET DEBUG_SYNC="wait_in_query_cache_insert SIGNAL parked2 WAIT_FOR go2 EXECUTE 1";
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SELECT SQL_CACHE * FROM t2 UNION SELECT * FROM t3;
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connection default;
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** Assert that the SELECT-stmt thread reaches the sync point.
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SET DEBUG_SYNC="now WAIT_FOR parked2";
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**
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**
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connection thd3;
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** On THD3: Insert another result into the cache and block on the same
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** debug hook.
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SET DEBUG_SYNC="wait_in_query_cache_insert SIGNAL parked3 WAIT_FOR go3 EXECUTE 1";
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SELECT SQL_CACHE * FROM t4 UNION SELECT * FROM t5;
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connection default;
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** Assert that the SELECT-stmt thread reaches the sync point.
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SET DEBUG_SYNC="now WAIT_FOR parked3";
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**
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**
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** Signal the DELETE thread, THD1, to continue. It will enter the mutex
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** lock and set query cache status to TABLE_FLUSH_IN_PROGRESS and then
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** unlock the mutex before stopping on the next debug hook.
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SET DEBUG_SYNC="now SIGNAL go1_1";
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** Assert that we reach the next debug hook.
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SET DEBUG_SYNC="now WAIT_FOR parked1_2";
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**
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** Signal the remaining debug hooks blocking THD2 and THD3.
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** The threads will grab the guard mutex enter the wait condition and
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** and finally release the mutex. The threads will continue to wait
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** until a broadcast signal reaches them causing both threads to
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** come alive and check the condition.
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SET DEBUG_SYNC="now SIGNAL go2";
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SET DEBUG_SYNC="now SIGNAL go3";
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**
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** Finally signal the DELETE statement on THD1 one last time.
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** The stmt will complete the query cache invalidation and return
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** cache status to NO_FLUSH_IN_PROGRESS. On the status change
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** One signal will be sent to the thread group waiting for executing
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** invalidations and a broadcast signal will be sent to the thread
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** group holding result set writers.
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SET DEBUG_SYNC="now SIGNAL go1_2";
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**
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*************************************************************************
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** No tables should be locked
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connection thd2;
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a
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aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
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DELETE FROM t1;
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DELETE FROM t2;
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DELETE FROM t3;
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connection thd3;
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a
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aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
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DELETE FROM t4;
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DELETE FROM t5;
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connection thd1;
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** Done.
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connection default;
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disconnect thd1;
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disconnect thd2;
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disconnect thd3;
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SET DEBUG_SYNC= 'RESET';
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SET GLOBAL query_cache_size= 0;
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connection default;
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# Restore defaults
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RESET QUERY CACHE;
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FLUSH STATUS;
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DROP TABLE t1,t2,t3,t4,t5;
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SET GLOBAL query_cache_size= DEFAULT;
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SET GLOBAL query_cache_type= DEFAULT;
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#
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# Bug#56822: Add a thread state for sessions waiting on the query cache lock
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#
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DROP TABLE IF EXISTS t1;
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CREATE TABLE t1 (a INT);
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INSERT INTO t1 VALUES (1),(2),(3);
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SET GLOBAL concurrent_insert= 1;
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SET GLOBAL query_cache_size= 1024*512;
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SET GLOBAL query_cache_type= ON;
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connect con1,localhost,root,,test,,;
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connect con2,localhost,root,,test,,;
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connection con1;
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SET DEBUG_SYNC = "wait_in_query_cache_invalidate2 SIGNAL parked WAIT_FOR go";
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# Send INSERT, will wait in the query cache table invalidation
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INSERT INTO t1 VALUES (4);;
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connection default;
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# Wait for insert to reach the debug point
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SET DEBUG_SYNC = "now WAIT_FOR parked";
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connection con2;
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# Send a query that should wait on the query cache lock
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RESET QUERY CACHE;
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connection default;
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# Wait for the state to be reflected in the processlist
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# Signal that the query cache can be unlocked
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SET DEBUG_SYNC="now SIGNAL go";
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connection con1;
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disconnect con1;
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connection con2;
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disconnect con2;
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connection default;
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# Restore defaults
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SET DEBUG_SYNC= 'RESET';
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RESET QUERY CACHE;
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DROP TABLE t1;
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SET GLOBAL query_cache_size= @save_query_cache_size;
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SET GLOBAL query_cache_type= DEFAULT;
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#
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# MDEV-14526: MariaDB keeps crashing under load when
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# query_cache_type is changed
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#
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CREATE TABLE t1 (
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`id` int(10) NOT NULL AUTO_INCREMENT,
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`k` int(10) default '0',
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PRIMARY KEY (`id`))
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ENGINE=MyISAM;
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INSERT IGNORE INTO t1 VALUES
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(NULL,1),(NULL,8),(NULL,NULL),(NULL,NULL),(NULL,4),(NULL,9),(NULL,7),
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(NULL,3),(NULL,NULL),(NULL,2),(NULL,3),(NULL,NULL),(NULL,2),(NULL,7),
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(NULL,1),(NULL,2),(NULL,4),(NULL,NULL),(NULL,1),(NULL,1),(NULL,4);
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SET GLOBAL query_cache_size= 1024*1024;
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SET GLOBAL query_cache_type= 1;
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connect con2,localhost,root,,test;
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connect con1,localhost,root,,test;
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set debug_sync="wait_in_query_cache_store_query SIGNAL parked WAIT_FOR go";
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SELECT DISTINCT id FROM t1 WHERE id BETWEEN 5603 AND 16218 ORDER BY k;
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connection default;
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set debug_sync="now WAIT_FOR parked";
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connection con2;
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SET GLOBAL query_cache_type= 0;;
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connection default;
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set debug_sync="now SIGNAL go";
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connection con1;
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id
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connection con2;
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disconnect con1;
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disconnect con2;
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connection default;
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set debug_sync= 'RESET';
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DROP TABLE t1;
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SET GLOBAL query_cache_size=@save_query_cache_size;
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SET GLOBAL query_cache_type= DEFAULT;
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SET @@GLOBAL.concurrent_insert=@save_concurrent_insert;
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# End of 5.5 tests
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