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 |
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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)
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