Re: [INTERFACES] Performance

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От Thomas Lockhart
Тема Re: [INTERFACES] Performance
Дата
Msg-id 377191AF.BE5F54A@alumni.caltech.edu
обсуждение исходный текст
Ответ на Performance  (Steven Bradley <sbradley@llnl.gov>)
Список pgsql-interfaces
> Is it unrealistic to expect Postgres to insert on the order of 100 
> records per second on a Pentium 400 MHz/SCSI class machine running 
> Linux?  (Solaris on a comparable platform has about 1/2 the 
> performance)

I'd expect roughly equivalent performance on different platforms. I
measured the insert performance a couple of years ago and found
roughly 50 inserts per second on my dual processor, 180MHz PPro
system, which was the same performance as I had on an Ingres
installation on a medium-speed Alpha/OSF-1 box.

Without knowing more about your memory and disk setup, I'll guess that
you can use more memory, can bump buffer size by using "-B 1024" or
something similar, and running without mandatory fsync() (use the "-F"
option). However, istm that your system should do better than 10ips
before you invoke "-F", otherwise you'll just be working around
another underlying problem/bottleneck.

Good luck.
                  - Thomas

-- 
Thomas Lockhart                lockhart@alumni.caltech.edu
South Pasadena, California


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