Forum .LRN Q&A: Re: Server recommend for dotLRN - with 80.000 users-

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10: Re: Server recommend for dotLRN - with 80.000 users- (response to 9)
Posted by Andrew Piskorski on 01/18/04 01:34 PM
Cato, my guess is you have your AOLserver threadtimeout set much too low, which is worth experimenting with and changing.

Why do you have so many more connections in your 2nd database pool than in your first? That seems weird.

On both machines, leaving the P4 hyperthreading turned on is also probably a bad idea unless you have a kernel (Linux 2.6.x, I think) which distinguishes between real and virtual/hyperthread processors.

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11: Re: Server recommend for dotLRN - with 80.000 users- (response to 10)
Posted by Cato Kolås on 01/19/04 09:41 AM
<blockquote> Cato, my guess is you have your AOLserver threadtimeout set
much too low, which is worth experimenting with and
changing.
</blockquote>

ok, will do. thx.

<blockquote> Why do you have so many more connections in your 2nd
database pool than in your first? That seems weird.
</blockquote>

have turned on logging when pools are empty:
ns_param  WarnEmpty          true
- and based on the numbers of warnings tried to adjust the settings.

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12: Re: Server recommend for dotLRN - with 80.000 users- (response to 11)
Posted by Nima Mazloumi on 01/19/04 10:28 AM
Hi Cato,
can you tell me what tool you use to log the load on the webserver and the database?

Greetings,
Nima

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13: Re: Server recommend for dotLRN - with 80.000 users- (response to 12)
Posted by Cato Kolås on 01/19/04 06:13 PM
|Hi Cato,
|can you tell me what tool you use to log the load on the
|webserver and the database?

It's mrtg with a custom script to gather information about the load from the two machines (runs uptime via ssh connections and greps for the load).