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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.
66 lines
1.3 KiB
Plaintext
66 lines
1.3 KiB
Plaintext
--source include/have_innodb.inc
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connect(con1,localhost,root,,);
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connect(con2,localhost,root,,);
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connect(con3,localhost,root,,);
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create table t1(a int not null primary key, b int, c int,d CHAR(100)) engine=innodb;
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delimiter //;
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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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delimiter ;//
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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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connection con1;
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send delete from t1 where a between 1000 and 1300;
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connection con2;
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send update t1 set b=b+1 where a between 2000 and 2600;
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connection con3;
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send insert into t1 select a+30000,b,c,d from t1 where a between 3000 and 4000;
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connection default;
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send delete from t1 where a between 6000 and 7000;
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connection con1;
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reap;
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connection con2;
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reap;
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connection con3;
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reap;
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connection default;
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reap;
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disconnect con1;
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disconnect con2;
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disconnect con3;
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# test that below does not crash, actual result is not
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# repeatable
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--disable_query_log
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--disable_result_log
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--disable_warnings
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select * from information_schema.innodb_mutexes;
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--enable_query_log
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--enable_result_log
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--enable_warnings
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drop procedure innodb_insert_proc;
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drop table t1; |