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diff --git a/docs/manual/process-model.html b/docs/manual/process-model.html new file mode 100644 index 0000000000..f2c22f9ccc --- /dev/null +++ b/docs/manual/process-model.html @@ -0,0 +1,50 @@ +<HTML><HEAD> +<TITLE>Server Pool Management with MinSpareServers and MaxSpareServers</TITLE> +</HEAD><BODY> + +<IMG SRC="../images/apache_sub.gif" ALT=""> +<H3>Server Pool Management with MinSpareServers and MaxSpareServers</H3> + +<HR> +<P> +We found that many people were using values for "MaxServers" either +too high or too low, and were hanging themselves on it. The model we +adopted is still based on long-lived minimal-forking processes, but +instead of specifying one number of persistant processes, the +webmaster specifies a maximum and minimum number of processes to be +"spare" - every couple of seconds the parent checks the actual number +of spare servers and adjusts accordingly. This should keep the number +of servers concurrently running relatively low while still ensuring +minimal forking. + +<P> + +We renamed the current StartServers to MinSpareServers, created +separate StartServers parameter which means what it says, and renamed +MaxServers to MaxSpareServers (though the old name still works, for +NCSA 1.4 back-combatibility). The old names were generally regarded +as too confusing. + +<P> + +The defaults for each variable are: + +<PRE> +MinSpareServers 5 +MaxSpareServers 10 +StartServers 10 +</PRE> + +There is a compile-time limit of 150 absolute maximum number of +simultaneous children that will be allowed, which can be overruled by +"MaxClients", though we don't recommend changing that number unless + +<OL> +<LI>You know you have the server resources to handle more +<LI>You use the machine for other purposes and must limit the amount of memory +Apache uses +</OL> + +</body></html> + + |