Re: [INTERFACES] Performance

Steven Bradley <sbradley(at)llnl(dot)gov> writes:

> I have simplified the problem down to a single (non-indexed) table with
> about a half-dozen columns (int4, timestamp, varchar, etc.) I wrote a
> quick and dirty C program which uses the libpq interface to INSERT records
> into the table in real-time. The best performance I could achieve was on
> the order of 15 inserts per second. What I need is something much closer
> to 100 inserts per second.

I actually did pretty much the same thing just as a quick test of
version 6.5 the other day. On my system (PostgreSQL 6.5 under NetBSD
1.4 on a 350MHz Pentium II with 128MB of RAM, and fast SCSI disks
behind an Adaptec 2940 on a PCI bus), I got about 25 inserts per
second. I then wrapped the whole series of inserts in a BEGIN/END
block. This increased the speed to about 1000 inserts per second.
Yup. A thousand. That's 40 times the speed. Pretty cool. :-)

For the actual application I have in mind, I'll be dropping BEGIN and
END statements into the command stream based on insert rate, I think.

-tih
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