I have a plesk (7.5.2 box) running with Redhat 9. This machine (Pentium 4 1024 mhz) was running fine for quite a long time. This week one of my sites became very populair and this gives me some troubles. The apache server stops to work and I need to restart it within every 10 minutes. Then apache is up and after 10 minutes its down again. The server log said this:

[error] server reached MaxClients setting, consider raising the MaxClients setting

So I changed the MaxClients from 100 to 256.
This will increase the dying time from 10 minutes till 20 minutes but does not solve the problem. When I check the apache status I see this:

/etc/init.d/httpd status
httpd (pid 5073 5072 5071 5070 5069 5068 5067 5065 5064 5063 5062 5061 5060 5059 5058 5057 5056 5055 5054 5053 5052 5051 5050 5049 5048 5034 5033 5032 5031 5030 5029 5028 5027 5026 5025 5024 5023 5022 5021 5019 5018 5010 5009 5008 5007 5006 5004 5003 5002 4998 4997 4995 4994 4991 4990 4988 4953 4952 4951 4950 4949 4947 4946 4945 4944 4943 4942 4941 4940 4939 4938 4937 4936 4935 4934 4933 4932 4930 4929 4928 4927 4926 4925 4924 4923 4922 4921 etc etc etc

This is my current httpd.conf:

KeepAlive Off
MaxKeepAliveRequests 100
KeepAliveTimeout 15

<IfModule prefork.c>
StartServers 8
MinSpareServers 5
MaxSpareServers 20
MaxClients 256
MaxRequestsPerChild 1000
</IfModule>

<IfModule worker.c>
StartServers 2
MaxClients 256
MinSpareThreads 25
MaxSpareThreads 75
ThreadsPerChild 25
MaxRequestsPerChild 0
</IfModule>

<IfModule perchild.c>
NumServers 5
StartThreads 5
MinSpareThreads 5
MaxSpareThreads 10
MaxThreadsPerChild 20
MaxRequestsPerChild 0
</IfModule>

Please let me know how I can solve this problem!

read this
http://httpd.apache.org/docs-2.0/mod/prefork.html

I have The same problem:
My server is FILE server only (Xeon, RAM 2G, 200GB HDD, Apache/2.0.52), with many internet client DOWNLOAD files (not upload, have not Database).
The number of httpd process is incresed very quickly, and reached MaxClients quickly, each 3 minute, i count httpd process, as folowing:

2008-06-22 10:15:02-RESTART HTTPD service:
2008-06-22 10:18:02-COUNT=63
2008-06-22 10:21:01-COUNT=140
2008-06-22 10:24:02-COUNT=173
2008-06-22 10:27:02-COUNT=328
2008-06-22 10:30:02-COUNT=434
2008-06-22 10:33:01-COUNT=561
2008-06-22 10:36:02-COUNT=630
2008-06-22 10:39:01-COUNT=751
2008-06-22 10:42:01-COUNT=877
2008-06-22 10:45:01-COUNT=999
...
And this problem repeats and repeats...


My server installed Apache/2.0.52, with settings:
-----
KeepAlive Off
MaxKeepAliveRequests 100
KeepAliveTimeout 15

<IfModule prefork.c>
StartServers 16
MinSpareServers 3
MaxSpareServers 5
ServerLimit 1000
MaxClients 1000
MaxRequestsPerChild 1000
</IfModule>
------
I've change some parameter, ex, decrease MaxRequestsPerChild (2000-1000->100...), KeepAlive Off ->On... and other changes... But problem still happens!

Have you got experience in this problem?
Thanks very much!

Before you try to troubleshoot the issue at apache level, I suggest you to go with another NIC of good make and make apache listen on both NICs for providing availability.I assume that this will solve the problem to 35-50% .

mahen

Thanks!

And I wonder if this solution can resolve problem : ?

http://www.theadminzone.com/forums/s...ht=lightweight