Current File : //usr/share/mysql-test/suite/perfschema/t/thread_cache.test
# Tests for PERFORMANCE_SCHEMA
--source include/not_embedded.inc
--source include/have_perfschema.inc
#
# Important note:
# this test is extremely sensitive to how threads are running inside the server,
# so it has it's own -master.opt file, to enforce it runs alone in mysqld
#
# Setup
flush status;
SET @saved_thread_cache_size = @@global.thread_cache_size;
set global thread_cache_size = 0;
show variables like "thread_cache_size";
connect (con1, localhost, root, , );
let $con1_ID=`select connection_id()`;
let $con1_THREAD_ID=`select thread_id from performance_schema.threads
where PROCESSLIST_ID = connection_id()`;
connect (con2, localhost, root, , );
let $con2_ID=`select connection_id()`;
let $con2_THREAD_ID=`select thread_id from performance_schema.threads
where PROCESSLIST_ID = connection_id()`;
--connection default
--disable_query_log
eval select ($con2_ID - $con1_ID) into @id_increment;
eval select ($con2_THREAD_ID - $con1_THREAD_ID) into @thread_id_increment;
--enable_query_log
# Expect 1, connection_id() is incremented for each new connection
select @id_increment;
# Expect 1, THREAD_ID is incremented for each new connection
select @thread_id_increment;
--disconnect con2
--connection default
# Debug
# select * from performance_schema.threads
# where name like "thread/sql/one_connection";
# Wait for the disconnect con2 to complete
let $wait_condition=
select count(*) = 2 from performance_schema.threads
where name like "thread/sql/one_connection";
--source include/wait_condition.inc
connect (con3, localhost, root, , );
let $con3_ID=`select connection_id()`;
let $con3_THREAD_ID=`select thread_id from performance_schema.threads
where PROCESSLIST_ID = connection_id()`;
--disconnect con3
--disconnect con1
--connection default
# Debug
# select * from performance_schema.threads
# where name like "thread/sql/one_connection";
# Wait for the disconnect con1 and con3 to complete
let $wait_condition=
select count(*) = 1 from performance_schema.threads
where name like "thread/sql/one_connection";
--source include/wait_condition.inc
--disable_query_log
eval select ($con3_ID - $con2_ID) into @id_increment;
eval select ($con3_THREAD_ID - $con2_THREAD_ID) into @thread_id_increment;
--enable_query_log
select @id_increment;
select @thread_id_increment;
set global thread_cache_size = 100;
show variables like "thread_cache_size";
connect (con1, localhost, root, , );
let $con1_ID=`select connection_id()`;
let $con1_THREAD_ID=`select thread_id from performance_schema.threads
where PROCESSLIST_ID = connection_id()`;
connect (con2, localhost, root, , );
let $con2_ID=`select connection_id()`;
let $con2_THREAD_ID=`select thread_id from performance_schema.threads
where PROCESSLIST_ID = connection_id()`;
--connection default
--disable_query_log
eval select ($con2_ID - $con1_ID) into @id_increment;
eval select ($con2_THREAD_ID - $con1_THREAD_ID) into @thread_id_increment;
--enable_query_log
select @id_increment;
select @thread_id_increment;
--disconnect con2
--connection default
# Debug
# select * from performance_schema.threads
# where name like "thread/sql/one_connection";
# Wait for the disconnect con2 to complete
let $wait_condition=
select count(*) = 2 from performance_schema.threads
where name like "thread/sql/one_connection";
--source include/wait_condition.inc
connect (con3, localhost, root, , );
let $con3_ID=`select connection_id()`;
let $con3_THREAD_ID=`select thread_id from performance_schema.threads
where PROCESSLIST_ID = connection_id()`;
--disconnect con3
--disconnect con1
--connection default
# Debug
# select * from performance_schema.threads
# where name like "thread/sql/one_connection";
# Wait for the disconnect con1 and con3 to complete
let $wait_condition=
select count(*) = 1 from performance_schema.threads
where name like "thread/sql/one_connection";
--source include/wait_condition.inc
--disable_query_log
eval select ($con3_ID - $con2_ID) into @id_increment;
eval select ($con3_THREAD_ID - $con2_THREAD_ID) into @thread_id_increment;
--enable_query_log
# When caching threads, the pthread that executed con2 was parked in the
# cache on disconnect, and then picked up con3.
# Still expect a new connection_id()
select @id_increment;
# And expect a new instrumentation: the THREAD_ID of old connections should not be reused.
select @thread_id_increment;
set global thread_cache_size = @saved_thread_cache_size;
show status like "performance_schema_thread%";
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