Server crashes

[Amr el-Saeed]

i'm running 
Linux version 2.4.21-51.EL (brewbuilder at ls20-bc2-14.build.redhat.com) 
(gcc version 3.2.3 20030502 (Red Hat Linux 3.2.3-58))



Amr el-Saeed wrote:
> Dear Alan,
>
> Thanks for your reply
>
> first, i have about 200,000 users but there is some thin g in the 
> configuration  that makes the users  connects and disconnects  in less 
> than 15 minutes , and that makes that huge number of requests
> (it's a temp. situation ) of-course.
>
> second i tried the configuration you sent.
> the server didn't start, so i guess it OS problem as you said but how 
> to fix it ??
> can you help me with that ??
>
> thanks again
> Amr
>
> Alan DeKok wrote:
>> Amr el-Saeed wrote:
>>  
>>> Sorry
>>> the config. was in the first email
>>>
>>> I have this configuration
>>>     
>> .
>> ... thread stuff.  There's usually a LOT more configuration than that.
>>
>>  
>>> start_servers = 20
>>> max_servers = 400
>>> min_spare_servers = 30
>>> max_spare_servers = 60
>>>     
>>
>>   I would suggest setting:
>>
>>   start_servers = 400
>>   max_servers = 400
>>   min_spare_servers = 0
>>   max_spare_servers = 400
>>
>>   If the server doesn't start with those parameters, it's because your
>> OS doesn't let you start that many threads.  In that case, go fix the 
>> OS.
>>
>>  
>>> i need 10,000  per second
>>>     
>>
>>   I doubt that very much.  That's a billion packets per day.  Or, it's
>> 500K users logged in all of the time, each of whom is online for only 10
>> minutes.
>>
>>   There are large ISP's with 10+ million users who see only hundreds of
>> requests per second.  You're talking about 100 times that, which is very
>> unusual.
>>
>>   Please explain why you need such a HUGE number of requests.  It may
>> help solve the problem you're seeing.  Do you have a billion users in
>> your ISP?  Or do you have fewer users than that?  How many users do you
>> expect to see online at once?  How many minutes are they online for at a
>> time?
>>
>>   Also, most databases can't handle 10k writes per second, (some can't
>> handle 10k *reads* per second).  So it's very doubtful that you'll be
>> able to do anything with 10k packets/s, even if the RADIUS server itself
>> can handle them.
>>
>>   I'm not aware of a single RADIUS installation on the planet that needs
>> 10K packets per second.  And even the ones that handle hundreds to
>> thousands of packets per second split those packets among multiple
>> machines.  i.e. If you have a 10M users in your ISP, you can't afford to
>> have everyone go offline because your ONLY RADIUS server died.  You will
>> need 4-5 RADIUS servers for service stability, at least.
>>
>>   The result is that any one RADIUS machine will normally NEVER handle
>> more than a few hundred packets per second.  If you need more than that,
>> your network is designed wrong.
>>
>>   Alan DeKok.
>> -
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