mirror of
https://github.com/MariaDB/server.git
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47fae7f08f
Now when a table is dropped the statistics on the table is removed from the statistical tables. If the table is altered in such a way that a column is dropped or the type of the column is changed then statistics on the column is removed from the table column_stat. It also triggers removal of the statistics on the indexes who use this column as its component. Added procedures that changes the names of the tables or columns in the statistical tables for. These procedures are used when tables/columns are renamed. Also partly re-factored the code that introduced the persistent statistical tables. Added test cases into statistics.test to cover the new code.
62 lines
3 KiB
Text
62 lines
3 KiB
Text
update performance_schema.setup_instruments set enabled='NO';
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update performance_schema.setup_instruments set enabled='YES'
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where name like "wait/io/file/myisam/%";
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update performance_schema.setup_consumers
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set enabled='YES';
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truncate table performance_schema.events_waits_history_long;
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flush status;
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drop table if exists test.no_index_tab;
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create table test.no_index_tab ( a varchar(255), b int ) engine=myisam;
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insert into no_index_tab set a = 'foo', b = 1;
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insert into no_index_tab set a = 'foo', b = 1;
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insert into no_index_tab set a = 'foo', b = 1;
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select event_name,
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left(source, locate(":", source)) as short_source,
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operation, number_of_bytes,
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substring(object_name, locate("no_index_tab", object_name)) as short_name
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from performance_schema.events_waits_history_long
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where operation not like "tell"
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and event_name like "wait/io/file/myisam/%"
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having short_name <> ""
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order by thread_id, event_id;
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event_name short_source operation number_of_bytes short_name
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wait/io/file/myisam/kfile mi_create.c: create NULL no_index_tab.MYI
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wait/io/file/myisam/dfile mi_create.c: create NULL no_index_tab.MYD
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wait/io/file/myisam/kfile mi_open.c: write 176 no_index_tab.MYI
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wait/io/file/myisam/kfile mi_open.c: write 100 no_index_tab.MYI
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wait/io/file/myisam/kfile mi_open.c: write 7 no_index_tab.MYI
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wait/io/file/myisam/kfile mi_open.c: write 7 no_index_tab.MYI
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wait/io/file/myisam/kfile mi_open.c: write 7 no_index_tab.MYI
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wait/io/file/myisam/kfile mi_create.c: chsize 1024 no_index_tab.MYI
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wait/io/file/myisam/dfile mi_create.c: close NULL no_index_tab.MYD
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wait/io/file/myisam/kfile mi_create.c: close NULL no_index_tab.MYI
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wait/io/file/myisam/kfile mi_open.c: open NULL no_index_tab.MYI
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wait/io/file/myisam/kfile mi_open.c: read 24 no_index_tab.MYI
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wait/io/file/myisam/kfile mi_open.c: seek NULL no_index_tab.MYI
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wait/io/file/myisam/kfile mi_open.c: read 297 no_index_tab.MYI
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wait/io/file/myisam/dfile mi_open.c: open NULL no_index_tab.MYD
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wait/io/file/myisam/kfile mi_locking.c: write 3 no_index_tab.MYI
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wait/io/file/myisam/dfile mi_dynrec.c: write 20 no_index_tab.MYD
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wait/io/file/myisam/kfile mi_open.c: write 124 no_index_tab.MYI
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wait/io/file/myisam/dfile mi_dynrec.c: write 20 no_index_tab.MYD
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wait/io/file/myisam/kfile mi_open.c: write 124 no_index_tab.MYI
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wait/io/file/myisam/dfile mi_dynrec.c: write 20 no_index_tab.MYD
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wait/io/file/myisam/kfile mi_open.c: write 124 no_index_tab.MYI
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show status like 'performance_schema_%';
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Variable_name Value
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Performance_schema_cond_classes_lost 0
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Performance_schema_cond_instances_lost 0
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Performance_schema_file_classes_lost 0
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Performance_schema_file_handles_lost 0
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Performance_schema_file_instances_lost 0
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Performance_schema_locker_lost 0
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Performance_schema_mutex_classes_lost 0
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Performance_schema_mutex_instances_lost 0
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Performance_schema_rwlock_classes_lost 0
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Performance_schema_rwlock_instances_lost 0
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Performance_schema_table_handles_lost 0
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Performance_schema_table_instances_lost 0
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Performance_schema_thread_classes_lost 0
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Performance_schema_thread_instances_lost 0
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update performance_schema.setup_instruments set enabled='YES';
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drop table test.no_index_tab;
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