Hi Hackers,
I saw stats information was not updated sometimes when I tested HEAD on
Windows. Once it happens, stats are not collected until server restarts.
The condition seems to happen on high-CPU load. I can reproduce it
in a few seconds using pgbench on the machine with one Pentium 4
with hyper-threading. But if I use an original "pgbench with sleep"
load, it won't occur.
Is this a bug or some environment-dependent problems?
[additional information]
I added elog calls for printf-debug.
PgstatCollectorMain() in pgstat.c
| elog(LOG, "pgstat select");
| if (select(pgStatSock + 1, &rfds, NULL, NULL, &sel_timeout) < 0)
| { ...
After stuck, select() always results in time-out. "LOG: pgstat select" is
repeated every 2 seconds (maybe PGSTAT_SELECT_TIMEOUT).
Regards,
---
ITAGAKI Takahiro
NTT Open Source Software Center
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