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ea35bf7a71
Before this fix, the test thread_cache failed with spurious failures. The test used: -- disconnect X -- connect Y while assuming that connection Y would reuse connection X slot in the thread cache. For this to happen, the disconnect X operation must be given enough time to complete, otherwise connect Y can be executed in the server before X actually finishes. This fix uses wait conditions to make the test execution more controlled, and more reproductible.
167 lines
4.5 KiB
Plaintext
167 lines
4.5 KiB
Plaintext
# Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; version 2 of the License.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# 51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
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# Tests for PERFORMANCE_SCHEMA
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--source include/not_embedded.inc
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--source include/have_perfschema.inc
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# Setup
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flush status;
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SET @saved_thread_cache_size = @@global.thread_cache_size;
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set global thread_cache_size = 0;
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show variables like "thread_cache_size";
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connect (con1, localhost, root, , );
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let $con1_ID=`select connection_id()`;
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let $con1_THREAD_ID=`select thread_id from performance_schema.threads
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where PROCESSLIST_ID = connection_id()`;
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connect (con2, localhost, root, , );
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let $con2_ID=`select connection_id()`;
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let $con2_THREAD_ID=`select thread_id from performance_schema.threads
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where PROCESSLIST_ID = connection_id()`;
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--connection default
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--disable_query_log
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eval select ($con2_ID - $con1_ID) into @id_increment;
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eval select ($con2_THREAD_ID - $con1_THREAD_ID) into @thread_id_increment;
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--enable_query_log
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# Expect 1, connection_id() is incremented for each new connection
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select @id_increment;
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# Expect 1, THREAD_ID is incremented for each new connection
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select @thread_id_increment;
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--disconnect con2
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--connection default
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# Wait for the disconnect con2 to complete
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let $wait_condition=
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select count(*) = 2 from performance_schema.threads
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where name like "thread/sql/one_connection";
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--source include/wait_condition.inc
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connect (con3, localhost, root, , );
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let $con3_ID=`select connection_id()`;
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let $con3_THREAD_ID=`select thread_id from performance_schema.threads
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where PROCESSLIST_ID = connection_id()`;
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--disconnect con3
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--disconnect con1
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--connection default
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# Wait for the disconnect con1 and con3 to complete
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let $wait_condition=
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select count(*) = 1 from performance_schema.threads
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where name like "thread/sql/one_connection";
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--source include/wait_condition.inc
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--disable_query_log
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eval select ($con3_ID - $con2_ID) into @id_increment;
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eval select ($con3_THREAD_ID - $con2_THREAD_ID) into @thread_id_increment;
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--enable_query_log
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select @id_increment;
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select @thread_id_increment;
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set global thread_cache_size = 100;
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show variables like "thread_cache_size";
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connect (con1, localhost, root, , );
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let $con1_ID=`select connection_id()`;
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let $con1_THREAD_ID=`select thread_id from performance_schema.threads
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where PROCESSLIST_ID = connection_id()`;
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connect (con2, localhost, root, , );
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let $con2_ID=`select connection_id()`;
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let $con2_THREAD_ID=`select thread_id from performance_schema.threads
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where PROCESSLIST_ID = connection_id()`;
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--connection default
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--disable_query_log
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eval select ($con2_ID - $con1_ID) into @id_increment;
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eval select ($con2_THREAD_ID - $con1_THREAD_ID) into @thread_id_increment;
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--enable_query_log
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select @id_increment;
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select @thread_id_increment;
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--disconnect con2
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--connection default
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# Wait for the disconnect con2 to complete
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let $wait_condition=
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select count(*) = 2 from performance_schema.threads
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where name like "thread/sql/one_connection";
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--source include/wait_condition.inc
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connect (con3, localhost, root, , );
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let $con3_ID=`select connection_id()`;
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let $con3_THREAD_ID=`select thread_id from performance_schema.threads
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where PROCESSLIST_ID = connection_id()`;
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--disconnect con3
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--disconnect con1
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--connection default
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# Wait for the disconnect con1 and con3 to complete
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let $wait_condition=
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select count(*) = 1 from performance_schema.threads
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where name like "thread/sql/one_connection";
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--source include/wait_condition.inc
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--disable_query_log
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eval select ($con3_ID - $con2_ID) into @id_increment;
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eval select ($con3_THREAD_ID - $con2_THREAD_ID) into @thread_id_increment;
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--enable_query_log
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# When caching threads, the pthread that executed con2 was parked in the
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# cache on disconnect, and then picked up con3.
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# Still expect a new connection_id()
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select @id_increment;
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# And expect a new instrumentation: the THREAD_ID of old connections should not be reused.
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select @thread_id_increment;
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set global thread_cache_size = @saved_thread_cache_size;
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show status like "performance_schema_thread%";
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