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1cc7befc14
MDEV-7399: Add support for INFORMATION_SCHEMA.INNODB_MUTEXES
MDEV-7618: Improve semaphore instrumentation
Introduced two new information schema tables to monitor mutex waits
and semaphore waits. Added a new configuration variable
innodb_intrument_semaphores to add thread_id, file name and
line of current holder of mutex/rw_lock.
22 lines
713 B
Plaintext
22 lines
713 B
Plaintext
create table t1(a int not null primary key, b int, c int,d CHAR(100)) engine=innodb;
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create procedure innodb_insert_proc (repeat_count int)
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begin
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declare current_num int;
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set current_num = 0;
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while current_num < repeat_count do
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insert into t1 values(current_num, RAND(), RAND(), substring(MD5(RAND()), -64));
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set current_num = current_num + 1;
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end while;
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end//
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commit;
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set autocommit=0;
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call innodb_insert_proc(20000);
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commit;
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set autocommit=1;
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delete from t1 where a between 1000 and 1300;
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update t1 set b=b+1 where a between 2000 and 2600;
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insert into t1 select a+30000,b,c,d from t1 where a between 3000 and 4000;
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delete from t1 where a between 6000 and 7000;
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drop procedure innodb_insert_proc;
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drop table t1;
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