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Re: Inefficient bytea escaping?

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Marko Kreen <markokr(at)gmail(dot)com>
Cc: Martijn van Oosterhout <kleptog(at)svana(dot)org>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Andreas Pflug <pgadmin(at)pse-consulting(dot)de>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Inefficient bytea escaping?
Date: 2006-05-29 23:27:37
Message-ID: 200605292327.k4TNRb100545@candle.pha.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers
Marko Kreen wrote:
> On 5/28/06, Martijn van Oosterhout <kleptog(at)svana(dot)org> wrote:
> > With -lpthread
> > lock.enabled     323s
> > lock.disabled     50s
> > lock.unlocked     36s
> 
> I forgot to test with -lpthread, my bad.  Indeed by default
> something less expensive that full locking is going on.
> 
> > The crux of the matter is though, if you're calling something a million
> > times, you're better off trying to find an alternative anyway. There is
> > a certain amount of overhead to calling shared libraries and no amount
> > of optimisation of the library is going save you that.
> 
> The crux of the matter was if its possible to use fwrite
> as easy string combining mechanism and the answer is no,
> because it's not lightweight enough.

So your patch to src/backend/storage/file/fd.c should be discarded?  OK.

-- 
  Bruce Momjian   http://candle.pha.pa.us
  EnterpriseDB    http://www.enterprisedb.com

  + If your life is a hard drive, Christ can be your backup. +

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