Re^3: Apache / 30,000 Perl script serving limit

A quick googling found this for me. I haven't investiged this any further yet, but it seems to hint at the "maxuprc" kernel parameter, or some related setting. Check with /usr/sbin/kmtune what your settings are...

Comment on Re^3: Apache / 30,000 Perl script serving limit Download Code

Replies are listed 'Best First'.
Re^4: Apache / 30,000 Perl script serving limit by QcMonk (Novice) on May 06, 2009 at 17:12 UTC
Almut, I must thank you for your efforts, It has put me into a direction of investigation I had not yet discovered. I have found our maxuprc parameter was set to 256 and we have increased it to 1024. Re-running the test script (another round of 30k perl script requests) and it started giving the 500 Internal server error at the same iteration (30 thousandth). Monitoring the OS we found the total number of process used every each hour(at XX:00) was never exceeding 10 and represented about 0.9% usage. Anyhow, this experiments still allowed us to rule out (hopefully not mistakenly) that the maxuprc parameter has any effect with regards to this problem.	[reply]

Replies are listed 'Best First'.

Re^4: Apache / 30,000 Perl script serving limit
by QcMonk (Novice) on May 06, 2009 at 17:12 UTC

Almut, I must thank you for your efforts, It has put me into a direction of investigation I had not yet discovered.

I have found our maxuprc parameter was set to 256 and we have increased it to 1024. Re-running the test script (another round of 30k perl script requests) and it started giving the 500 Internal server error at the same iteration (30 thousandth). Monitoring the OS we found the total number of process used every each hour(at XX:00) was never exceeding 10 and represented about 0.9% usage.

Anyhow, this experiments still allowed us to rule out (hopefully not mistakenly) that the maxuprc parameter has any effect with regards to this problem.

[reply]