Re: PostgreSQL 8.4 performance tuning questions

["Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov>]

Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote: 
> Scott Carey <scott(at)richrelevance(dot)com> writes:
>> Gzip does have some quirky performance behavior depending on the
>> chunk size of data you stream into it.
> 
> Can you enlarge on that comment?  I'm not sure that pg_dump is aware
> that there's anything to worry about there.
 
If the library used here is anything like the native library used by
Java, it'd be worth putting a buffer layer ahead of the calls to gzip,
so it isn't dealing with each individual value as a separate call.  I
seem to remember running into that issue in Java, where throwing a
BufferedOutputStream in there fixed the performance issue.
 
-Kevin