hi, I'm trying to predict how many memory should be used with Apache2.2.3 (worker) + Linux2.6.x. This setup is only serving static content, and trying to serve 10000 simultaneous users (about 10000 connections,500 simultaneous requests at the same time). I have several questions below. 1. How many memory is used for holding one connection across software layers (including kernel TCP/IP stack and apache)? 2. How many memory is used for holding one request across software layers (including kernel TCP/IP stack and apache)? 3. If memory is exhausted and total connections are not exceeded the MaxClients limit (that means Apache will return no mem), what happens if a new connection coming? Apache send "503" or "500" error? And also what happens if a new request coming in a keepalived connection? Apache send "503" or "500"? Does Apache have a pending handling mechanism (I mean holding the connection or request till memory is available, and not sending error message to clients) when out of memory? Thanks in advance. Thx, Xuekun --------------------------------------------------------------------- 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