Re: Compression and on-disk sorting - Mailing list pgsql-hackers

From Tom Lane
Subject Re: Compression and on-disk sorting
Date
Msg-id 20865.1147985717@sss.pgh.pa.us
Whole thread Raw
In response to Re: Compression and on-disk sorting  ("Jim C. Nasby" <jnasby@pervasive.com>)
Responses Re: Compression and on-disk sorting  ("Jim C. Nasby" <jnasby@pervasive.com>)
List pgsql-hackers
"Jim C. Nasby" <jnasby@pervasive.com> writes:
> Actually, I guess the amount of memory used for zlib's lookback buffer
> (or whatever they call it) could be pretty substantial, and I'm not sure
> if there would be a way to combine that across all tapes.

But there's only one active write tape at a time.  My recollection of
zlib is that compression is memory-hungry but decompression not so much,
so it seems like this shouldn't be a huge deal.
        regards, tom lane


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