Bug#11766528 PERFORMANCE_SCHEMA TRACKS BOTH BINARY AND RELAY LOGS IN THE SAME EVENTS

Before this fix, all the performance schema instrumentation for both the binary log
and the relay log would use the following instruments:
- wait/io/file/sql/binlog
- wait/io/file/sql/binlog_index
- wait/synch/mutex/sql/MYSQL_BIN_LOG::LOCK_index
- wait/synch/cond/sql/MYSQL_BIN_LOG::update_cond

This instrumentation is too general and can be more specific.

With this fix, the binlog instrumentation is identical,
and the relay log instrumentation is changed to:
- wait/io/file/sql/relaylog
- wait/io/file/sql/relaylog_index
- wait/synch/mutex/sql/MYSQL_RELAY_LOG::LOCK_index
- wait/synch/cond/sql/MYSQL_RELAY_LOG::update_cond

With this change, the performance instrumentation for the binary log and the relay log,
which share the same structure but have different uses, is more detailed.
This is especially important for hosts in the middle of a replication chain,
that are both masters (binlog) and slaves (relaylog).

mysql-test/suite/perfschema/t/relaylog.test

@@ -0,0 +1,112 @@
+# Copyright (c) 2011, 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/have_log_bin.inc
+--source include/not_embedded.inc
+--source include/have_perfschema.inc
+--source include/master-slave.inc
+
+--disable_warnings
+drop table if exists test.t1;
+--sync_slave_with_master
+reset master;
+--enable_warnings
+
+create table test.t1(a int);
+drop table test.t1;
+
+--source include/show_binlog_events.inc
+
+connection master;
+-- echo "============ Performance schema on master ============"
+
+let $MYSQLD_DATADIR= `SELECT @@datadir`;
+
+--replace_result $MYSQLD_DATADIR [DATADIR]
+select * from performance_schema.file_summary_by_instance
+  where file_name like "%master-%" order by file_name;
+
+--replace_result $MYSQLD_DATADIR [DATADIR]
+select * from performance_schema.file_summary_by_instance
+  where file_name like "%slave-%" order by file_name;
+
+# Expect a master binlog + binlog_index
+
+--replace_result $MYSQLD_DATADIR [DATADIR]
+select * from performance_schema.file_summary_by_instance
+  where event_name like "%binlog%" order by file_name;
+
+select * from performance_schema.file_summary_by_event_name
+  where event_name like "%binlog%" order by event_name;
+
+select event_name, count_star
+  from performance_schema.events_waits_summary_global_by_event_name
+  where event_name like "%MYSQL_BIN_LOG%" order by event_name;
+
+# Expect no slave relay log.
+
+--replace_result $MYSQLD_DATADIR [DATADIR]
+select * from performance_schema.file_summary_by_instance
+  where event_name like "%relaylog%" order by file_name;
+
+select * from performance_schema.file_summary_by_event_name
+  where event_name like "%relaylog%" order by event_name;
+
+select * from performance_schema.events_waits_summary_global_by_event_name
+  where event_name like "%MYSQL_RELAY_LOG%" order by event_name;
+
+sync_slave_with_master;
+-- echo "============ Performance schema on slave ============"
+
+let $MYSQLD_DATADIR= `SELECT @@datadir`;
+
+--replace_result $MYSQLD_DATADIR [DATADIR]
+select * from performance_schema.file_summary_by_instance
+  where file_name like "%master-%" order by file_name;
+
+--replace_result $MYSQLD_DATADIR [DATADIR]
+select * from performance_schema.file_summary_by_instance
+  where file_name like "%slave-%" order by file_name;
+
+# Expect a slave binlog + binlog_index
+
+--replace_result $MYSQLD_DATADIR [DATADIR]
+select * from performance_schema.file_summary_by_instance
+  where event_name like "%binlog%" order by file_name;
+
+select * from performance_schema.file_summary_by_event_name
+  where event_name like "%binlog%" order by event_name;
+
+select event_name, count_star
+  from performance_schema.events_waits_summary_global_by_event_name
+  where event_name like "%MYSQL_BIN_LOG%" order by event_name;
+
+# Expect a slave relay log.
+
+--replace_result $MYSQLD_DATADIR [DATADIR]
+select * from performance_schema.file_summary_by_instance
+  where event_name like "%relaylog%" order by file_name;
+
+select * from performance_schema.file_summary_by_event_name
+  where event_name like "%relaylog%" order by event_name;
+
+select event_name, count_star
+  from performance_schema.events_waits_summary_global_by_event_name
+  where event_name like "%MYSQL_RELAY_LOG%" order by event_name;
+
+--source include/stop_slave.inc
+