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This task is inspired by the Percona implementation of slow_query_log_always_write_time. This task implements the variable log_slow_always_query_time (name matching other MariaDB variables using the slow query log). The default value for the variable is 31536000, which makes MariaDB compatible with older installations. For queries with execution time longer than log_slow_always_query_time the variables log_slow_rate_limit and log_slow_min_examined_row_limit will be ignored and the query will be written to the slow query log if there is no other limitations (like log_slow_filter etc). Other things: - long_query_time internal variable renamed to log_slow_query_time. - More descriptive information for "log_slow_query_time".
22 lines
858 B
Text
22 lines
858 B
Text
select @@session.log_slow_always_query_time;
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@@session.log_slow_always_query_time
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31536000.000000
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SET GLOBAL log_slow_always_query_time= 20.2;
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SET SESSION log_slow_always_query_time=20.2;
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select @@global.log_slow_always_query_time, @@session.log_slow_always_query_time;
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@@global.log_slow_always_query_time @@session.log_slow_always_query_time
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20.200000 20.200000
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set GLOBAL log_slow_always_query_time= default;
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SET log_slow_query_time=0.5;
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SET log_slow_rate_limit=999;
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SET log_slow_always_query_time=1.5;
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SET log_slow_min_examined_row_limit= 100;
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[slow_log_start.inc] log_slow_always_query_time-1
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SELECT sleep(2) as 'this-should-be-logged';
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this-should-be-logged
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0
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SELECT sleep(1) as 'this-should-not-be-logged';
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this-should-not-be-logged
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0
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[log_grep.inc] file: log_slow_always_query_time-1 pattern: this-should expected_matches: 1
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[log_grep.inc] lines: 1
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