On 8/17/06, Ralph.Grothe@xxxxxxxxxxxxxx <Ralph.Grothe@xxxxxxxxxxxxxx> wrote:
[Thu Aug 17 09:13:36 2006] [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 8 children, there are 36 idle, and 71 total children I already increased MaxClients, StartServers, Min|MaxSpareServers and thought they were high enough. # sed -n '/^<IfModule prefork/,/^<\/IfModule/p' $SERVERROOT/conf/httpd.conf <IfModule prefork.c> StartServers 40 MinSpareServers 40 MaxSpareServers 80 ServerLimit 512 MaxClients 512 MaxRequestsPerChild 4000 </IfModule>
I have read the explanations to the above mentioned httpd.conf directives from http://httpd.apache.org/docs/2.0/mod/prefork.html several times. But to be honest, the more I read them the more contradicting they seem to me. I ask, why can't the master httpd spawn enough children fast enough when it always has according to the error_log entries well over 30 idle servers, and the MinSpareServer was configured to such a high value as 40? Why are the error_log entries suggesting I even need to raise them? I would assume that in such a case it had to spawn even more children to arrive at the lower MinSpareServers, being even more occupied with the task to service pending connect requests. Any suggestion as how to tune the prefork params would be highly appreciated.
Your central problem is that you have MinSpareServers set way too high. You are thus forcing apache to continually maintain a huge pool of idle servers. In your case I would recommend a MinSpareServers of 10 or less. (Perhaps the error message is a little misleading in this case, since you actually need to lower a value rather than raise it. It is not reporting a problem answering requests, but rather a problem maintaining the arbitrarily high number of idle children that you have targetted.) Also note, however, that an occasional "server seems busy" message in your logs is nothing to worry about. You should only be concerned if you see these very frequently, or if you notice poor performance. Joshua. --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
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