Re: Performance lossage in checkpoint dumping - Mailing list pgsql-hackers

From Bruce Momjian
Subject Re: Performance lossage in checkpoint dumping
Date
Msg-id 200102170333.WAA27042@candle.pha.pa.us
Whole thread Raw
In response to Re: Performance lossage in checkpoint dumping  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: Performance lossage in checkpoint dumping  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-hackers
> After looking a little more, I think this is too big a change to risk
> making for beta.  I was thinking it might be an easy change, but it's
> not; there's noplace to store the open-relation reference if we don't
> have a relcache entry.  But we don't want to pay the price of opening a
> relcache entry just to dump some buffers.
> 
> I recall Vadim speculating about decoupling the storage manager's notion
> of open files from the relcache, and having a much more lightweight
> open-relation mechanism at the smgr level.  That might be a good way
> to tackle this.  But I'm not going to touch it for 7.1...

No way to group the writes to you can keep the most recent one open?

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
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