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MDEV-7899: 10.1 is 3% slower than 10.0 in OLTP RO

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- Remove ANALYZE's timing code off the the execution path of regular
  SELECTs.
- Improve the tracker that tracks counts/execution times of SELECTs or
  DML statements:
  = regular execution just increments counters
  = ANALYZE will also collect timings.
This commit is contained in:
Sergei Petrunia
2015-04-07 01:29:17 +03:00
parent 2936fb127d
commit 2af935c8ec
10 changed files with 105 additions and 70 deletions
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4
sql/sql_explain.cc
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@ -1933,9 +1933,9 @@ void Explain_update::print_explain_json(Explain_query *query,
if (using_io_buffer)
writer->add_member("using_io_buffer").add_ll(1);
if (is_analyze && time_tracker.get_loops())
if (is_analyze && command_tracker.get_loops())
writer->
add_member("r_total_time_ms").add_double(time_tracker.get_time_ms());
add_member("r_total_time_ms").add_double(command_tracker.get_time_ms());
if (where_cond)
{