Howdy, Here's an updated version of the function stats patch. The biggest change is that by default only procedural language functions are counted. The GUC variable stats_function_level now takes 3 values: on, off and all. The latter also counts SQL and C language functions, "on" means only to count procedural language functions. The decision is now made in fmgr_info_cxt_security() Trigger functions are now also counted.
Sample output:
select procname, calls, total_time, total_cpu, self_time, self_cpu
from pg_stat_user_functions order by self_cpu desc limit 5;
procname | calls | total_time | total_cpu | self_time | self_cpu
--------------------+-------+------------+-----------+-----------+----------
next_batch | 32765 | 27139 | 8574 | 27139 | 8574
fetch_batch_events | 3636 | 9252 | 5622 | 3771 | 2717
batch_event_sql | 3636 | 5454 | 2888 | 3910 | 1962
finish_batch | 3420 | 3215 | 1475 | 3215 | 1475
batch_event_tables | 3636 | 1448 | 865 | 1434 | 858
(5 rows)
This is still 8.2 only (tested on 8.2.4 and 8.2.5), has seen some production
usage here at Skype (about a month on reasonably busy boxes). So far so good.
Couple of issues:
- sometimes self_cpu > self_time - currently blaming it on Linux version of
gettimeofday().
- dropped functions are not purged from stats, might bloat the stats file for
some usage patterns.
PS. Would something like this be a canditate for 8.4 inclusion (if polished up)?
Regards,
Martin
8.2-procstat.patch.gz
Description: GNU Zip compressed data
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