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Implement a fix for Bug#57058 -- send SERVER_QUERY_WAS_SLOW over

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network when a query was slow.

When a query is slow, sent a special flag to the client
indicating this fact.

Add a test case.
Implement review comments.
This commit is contained in:
Konstantin Osipov
2010-11-12 15:56:21 +03:00
parent 936bec8e2c
commit 4749b88494
10 changed files with 70 additions and 27 deletions
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14
sql/sql_class.h
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@ -2234,6 +2234,20 @@ public:
}
void set_time_after_lock() { utime_after_lock= my_micro_time(); }
ulonglong current_utime() { return my_micro_time(); }
/**
Update server status after execution of a top level statement.
Currently only checks if a query was slow, and assigns
the status accordingly.
Evaluate the current time, and if it exceeds the long-query-time
setting, mark the query as slow.
*/
void update_server_status()
{
ulonglong end_utime_of_query= current_utime();
if (end_utime_of_query > utime_after_lock + variables.long_query_time)
server_status|= SERVER_QUERY_WAS_SLOW;
}
inline ulonglong found_rows(void)
{
return limit_found_rows;