From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
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To: | Andrew Biagioni <andrew(dot)biagioni(at)e-greek(dot)net> |
Cc: | pgsql-admin(at)postgresql(dot)org |
Subject: | Re: Spontaneous PostgreSQL Server Reboot? |
Date: | 2004-03-30 04:33:35 |
Message-ID: | 26103.1080621215@sss.pgh.pa.us |
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Lists: | pgsql-admin |
Andrew Biagioni <andrew(dot)biagioni(at)e-greek(dot)net> writes:
> On three different machines running the same PostgreSQL version (7.3.5)
> on Linux and almost identical databases, I have been plagued by
> occasional, unexplainable (to me) reboots of the computer.
Postgres can *not* cause a system reboot; it's only an unprivileged user
process. (but see *) You are dealing with either kernel bugs, hardware
errors, or some other root-level process requesting a reboot.
Even though it being three different machines would seem to rule out
hardware issues, I'd not jump to that conclusion ... you might be having
some kind of common-mode hardware failure. Two questions to ask here:
* did you buy all the RAM from the same vendor?
* is the power utility flaky where you live? (If you say "but
I've got a UPS", how old are its batteries?)
My money would be on a kernel bug though. Are you up2date on kernel
patches?
regards, tom lane
(*) ObFinePrint: at least, PG can't directly trigger a reboot. One
scenario to think about is flaky RAM in an address range that doesn't
get used until the machine is under significant load --- since you say
Postgres is the only significant load on the machine, it's entirely
possible that triggering of a hardware failure is closely correlated to
what Postgres is doing. Similar remarks apply to broken disk hardware.
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