[ic] Most Common Performance Issues
Michael Stearne
interchange-users@icdevgroup.org
Mon Aug 26 12:17:01 2002
Barry Treahy, Jr. wrote:
> Michael Stearne wrote:
>
>> Our site is running IC on a DP 800Mhz Redhat box with 512MB of RAM
>> with SCSI disk. This machine runs only IC. The site is based off of
>> the foundation sample site and contains about 300 product using the
>> standard (non-RDBMS) database. We have seen decreasing performance
>> over the last 6 months the site has been up. There is up to 4 IC
>> processes running at a time because of traffic. Each page on the
>> site takes from 2-10 secs to generate. This is across all platforms
>> and browsers at LAN speed. If an IC process has the machine to itself
>> (only 1 user on the site), that process will take 97% of the CPU.
>> While this is understandable, even when there is 1 process, it still
>> takes ~4 seconds to generate a page. I don't know how a machine as
>> powerful can get floored by 4 concurrent users.
>>
>> Currently we run expireall each day. This seems to help a little.
>>
>> What else could I do (configuration, cron, etc) to work on performance?
>
>
> Hi Michael,
>
> I had many of the defaults, the random and cross components for
> example, which would drag down our development system. Simply put,
> those two functions really caused IC to generate a heavy CPU loaded.
> I can't say how much I should blame it on the fact that the DB's are
> in DBM rather than SQL, but I would have expected to see more of an
> I/O restriction with a poorer database format, not a CPU drain.
>
> Since I too am coming up to speed, perhaps some of the Perl and IC
> wizards could shed some light on that?
>
> Barry
>
I use the random component on many pages. I wonder if that could be an
issue, I kind of need to use the random component, though so I hope
there is a work around.
Michael