select @@session.log_slow_always_query_time;
@@session.log_slow_always_query_time
31536000.000000
SET GLOBAL log_slow_always_query_time= 20.2;
SET SESSION log_slow_always_query_time=20.2;
select @@global.log_slow_always_query_time, @@session.log_slow_always_query_time;
@@global.log_slow_always_query_time	@@session.log_slow_always_query_time
20.200000	20.200000
set GLOBAL log_slow_always_query_time= default;
SET log_slow_query_time=0.5;
SET log_slow_rate_limit=999;
SET log_slow_always_query_time=1.5;
SET log_slow_min_examined_row_limit= 100;
[slow_log_start.inc] log_slow_always_query_time-1
SELECT sleep(2) as 'this-should-be-logged';
this-should-be-logged
0
SELECT sleep(1) as 'this-should-not-be-logged';
this-should-not-be-logged
0
[log_grep.inc] file: log_slow_always_query_time-1 pattern: this-should expected_matches: 1
[log_grep.inc] lines:   1