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Bug#54782 Performance schema per thread accounting and thread cache

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Backport from mysql-next-mr (5.6) to mysql-trunk (5.5)
This commit is contained in:
Marc Alff
2010-07-16 07:50:50 -06:00
parent edf7865437
commit ae127ed601
3 changed files with 194 additions and 1 deletions
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34
mysql-test/suite/perfschema/r/thread_cache.result Normal file
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SET @saved_thread_cache_size = @@global.thread_cache_size;
set global thread_cache_size = 0;
show variables like "thread_cache_size";
Variable_name Value
thread_cache_size 0
select @id_increment;
@id_increment
1
select @thread_id_increment;
@thread_id_increment
1
select @id_increment;
@id_increment
1
select @thread_id_increment;
@thread_id_increment
1
set global thread_cache_size = 100;
show variables like "thread_cache_size";
Variable_name Value
thread_cache_size 100
select @id_increment;
@id_increment
1
select @thread_id_increment;
@thread_id_increment
1
select @id_increment;
@id_increment
1
select @thread_id_increment;
@thread_id_increment
1
set global thread_cache_size = @saved_thread_cache_size;

134
mysql-test/suite/perfschema/t/thread_cache.test Normal file
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# Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# 51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
# Tests for PERFORMANCE_SCHEMA
--source include/not_embedded.inc
--source include/have_perfschema.inc
# Setup
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.PROCESSLIST
where ID = connection_id()`;
connect (con2, localhost, root, , );
let $con2_ID=`select connection_id()`;
let $con2_THREAD_ID=`select thread_id from performance_schema.PROCESSLIST
where ID = connection_id()`;
connection default;
--disable_query_log
eval select ($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;
connect (con3, localhost, root, , );
let $con3_ID=`select connection_id()`;
let $con3_THREAD_ID=`select thread_id from performance_schema.PROCESSLIST
where ID = connection_id()`;
disconnect con3;
disconnect con1;
connection default;
--disable_query_log
eval select ($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.PROCESSLIST
where ID = connection_id()`;
connect (con2, localhost, root, , );
let $con2_ID=`select connection_id()`;
let $con2_THREAD_ID=`select thread_id from performance_schema.PROCESSLIST
where ID = connection_id()`;
connection default;
--disable_query_log
eval select ($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;
connect (con3, localhost, root, , );
let $con3_ID=`select connection_id()`;
let $con3_THREAD_ID=`select thread_id from performance_schema.PROCESSLIST
where ID = connection_id()`;
disconnect con3;
disconnect con1;
connection default;
--disable_query_log
eval select ($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;