Re: [HACKERS] collector/autovacuum after crash (8.1beta3)

2005-10-21 Thread Alvaro Herrera
Szima Gábor wrote:

 At system crash or poweroff the autovacuum statistics will be lost,
 because this statistics only stored in RAM and saved/restored at
 service shutdown/startup.
 I think it should be saved periodically and not to be deleted after
 crash.

I don't remember why it was that we made the stat file be dropped on
crash recovery, but there was a reason.  I guess you could research the
reason; it was a thread which ended with an autovacuum patch from me.
You could look the CVS logs for the pgstat.c file.

-- 
Alvaro Herrerahttp://www.advogato.org/person/alvherre
Someone said that it is at least an order of magnitude more work to do
production software than a prototype. I think he is wrong by at least
an order of magnitude.  (Brian Kernighan)

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Re: [HACKERS] collector/autovacuum after crash (8.1beta3)

2005-10-21 Thread Tom Lane
Alvaro Herrera [EMAIL PROTECTED] writes:
 Szima Gábor wrote:
 At system crash or poweroff the autovacuum statistics will be lost,

 I don't remember why it was that we made the stat file be dropped on
 crash recovery, but there was a reason.

The fact that it's not WAL-backed and hence couldn't be trusted.  But
I think he's complaining about the contrib version of autovacuum anyway.

regards, tom lane

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[HACKERS] collector/autovacuum after crash (8.1beta3)

2005-10-19 Thread Szima Gábor


Hi All,

At system crash or poweroff the autovacuum statistics will be lost,
because this statistics only stored in RAM and saved/restored at
service shutdown/startup.
I think it should be saved periodically and not to be deleted after
crash.



-Sygma

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