Re: Possibly corrupted shared memory, PostgreSQL 8.1 beta2, Windows 2000

I'll recompile with the trace that's no problem,
and install the patched release tonight.

After your last email, I've excluded the postgreSQL
directory from the antivirus because I could do it without
rebooting.

I was also sometimes getting read/write or open
error Invalid argument without the server crashing.
After two days, if I haven't seen any of these
error messages there is a very high chance that it's
been fixed by turning off the antivirus.

Jean-Pierre Pelletier

----- Original Message -----
From: "Qingqing Zhou" <zhouqq@cs.toronto.edu>
To: <pgsql-bugs@postgresql.org>
Sent: Wednesday, October 05, 2005 5:16 PM
Subject: Re: [BUGS] Possibly corrupted shared memory, PostgreSQL 8.1 beta2,
Windows 2000


>
> ""Jean-Pierre Pelletier"" <pelletier_32@sympatico.ca> wrote in message
> news:003801c5c9b0$03e08500$6401a8c0@JP...
>>
>> Yes, there is an antivirus software on the machine, a reboot is needed
>> when it's turned off,
>> I'll be allowed to reboot it tonight or I'll do it sooner if it crashes
>> before that.
>>
>> There are around 15 connections to PostgreSQL when it crashes but most
>> are idle
>> there may be a few inserts but no bulk inserts, the biggest load would
>> come from
>> select statements.
>>
>
> We haven't identified that the failed read/write are caused by anti-virus
> software or intensive read/write. If you can compile the source, can you
> patch smgrread()/smgrwrite() like this to capture the native windows
> error:
>
> void
> smgrwrite(SMgrRelation reln, BlockNumber blocknum, char *buffer, bool
> isTemp)
> {
> if (!(*(smgrsw[reln->smgr_which].smgr_write)) (reln, blocknum, buffer,
>               isTemp))
>   ereport(ERROR,
>    (errcode_for_file_access(),
>     errmsg("could not write block %u of relation %u/%u/%u:%d: %m",
>      blocknum,
>      reln->smgr_rnode.spcNode,
>      reln->smgr_rnode.dbNode,
>      reln->smgr_rnode.relNode,
>      GetLastError())));
> }
>
> Regards,
> Qingqing
>
>
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