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70 lines
2.7 KiB
70 lines
2.7 KiB
create
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definer = `mysql.sys`@localhost procedure sys.ps_setup_save(IN in_timeout int) comment '
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Description
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-----------
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Saves the current configuration of Performance Schema,
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so that you can alter the setup for debugging purposes,
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but restore it to a previous state.
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Use the companion procedure - ps_setup_reload_saved(), to
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restore the saved config.
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The named lock "sys.ps_setup_save" is taken before the
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current configuration is saved. If the attempt to get the named
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lock times out, an error occurs.
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The lock is released after the settings have been restored by
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calling ps_setup_reload_saved().
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Requires the SUPER privilege for "SET sql_log_bin = 0;".
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Parameters
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-----------
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in_timeout INT
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The timeout in seconds used when trying to obtain the lock.
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A negative timeout means infinite timeout.
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Example
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-----------
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mysql> CALL sys.ps_setup_save(-1);
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Query OK, 0 rows affected (0.08 sec)
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mysql> UPDATE performance_schema.setup_instruments
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-> SET enabled = ''YES'', timed = ''YES'';
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Query OK, 547 rows affected (0.40 sec)
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Rows matched: 784 Changed: 547 Warnings: 0
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/* Run some tests that need more detailed instrumentation here */
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mysql> CALL sys.ps_setup_reload_saved();
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Query OK, 0 rows affected (0.32 sec)
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' sql security invoker modifies sql data
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BEGIN
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DECLARE v_lock_result INT;
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SET @log_bin := @@sql_log_bin;
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SET sql_log_bin = 0;
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SELECT GET_LOCK('sys.ps_setup_save', in_timeout) INTO v_lock_result;
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IF v_lock_result THEN
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DROP TEMPORARY TABLE IF EXISTS tmp_setup_actors;
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DROP TEMPORARY TABLE IF EXISTS tmp_setup_consumers;
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DROP TEMPORARY TABLE IF EXISTS tmp_setup_instruments;
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DROP TEMPORARY TABLE IF EXISTS tmp_threads;
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CREATE TEMPORARY TABLE tmp_setup_actors SELECT * FROM performance_schema.setup_actors LIMIT 0;
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CREATE TEMPORARY TABLE tmp_setup_consumers LIKE performance_schema.setup_consumers;
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CREATE TEMPORARY TABLE tmp_setup_instruments LIKE performance_schema.setup_instruments;
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CREATE TEMPORARY TABLE tmp_threads (THREAD_ID bigint unsigned NOT NULL PRIMARY KEY, INSTRUMENTED enum('YES','NO') NOT NULL);
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INSERT INTO tmp_setup_actors SELECT * FROM performance_schema.setup_actors;
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INSERT INTO tmp_setup_consumers SELECT * FROM performance_schema.setup_consumers;
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INSERT INTO tmp_setup_instruments SELECT * FROM performance_schema.setup_instruments;
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INSERT INTO tmp_threads SELECT THREAD_ID, INSTRUMENTED FROM performance_schema.threads;
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ELSE
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SIGNAL SQLSTATE VALUE '90000'
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SET MESSAGE_TEXT = 'Could not lock the sys.ps_setup_save user lock, another thread has a saved configuration';
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END IF;
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SET sql_log_bin = @log_bin;
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END;
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