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Re: [HACKERS] char types gone.

From: Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us>
To: darrenk(at)insightdist(dot)com (Darren King)
Cc: pgsql-hackers(at)postgreSQL(dot)org
Subject: Re: [HACKERS] char types gone.
Date: 1998-03-25 02:38:35
Message-ID: 199803250239.VAA24516@candle.pha.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers
> > Yes, but if they are never referenced, the cache is empty for those
> > types.  Unless there is some performance change with their removal, why
> > remove them?  Disk space of binary?
> 
> How does the cache really work then?  Does one pg disk block map to one buffer?
> 
> When you say "the cache is empty for those types.", what do you mean?

I believe the buffer page cache does load in those types if they are in
the same page as a requsted type, but the relation/function caches only
store in requested relations/functions, as far as I know.

-- 
Bruce Momjian                          |  830 Blythe Avenue
maillist(at)candle(dot)pha(dot)pa(dot)us              |  Drexel Hill, Pennsylvania 19026
  +  If your life is a hard drive,     |  (610) 353-9879(w)
  +  Christ can be your backup.        |  (610) 853-3000(h)

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