I am running an apache 2 webserver. Everything works fine, but about every 14-20 days i have to restart the web server because it does not respond anymore.
Looking at the munin statistics, i recognized, that it is related to the number of apache processes. They are increasing continuously until they reach 150. Then Apache does not respond.
How do i prevent "freezing" apache?
Here is screenshot of the statistics:
Details:
- Apache runs on a Debian 5.0 root server.
- Using ISPConfig for management
- I host about 30 Websites
- 1000 Page Impressions per day (sum of all websites)
- Most of them are Drupal installations
- One Piwik Installation for all sites
- Some custom PHP applications
Logs ans Status messages:
Extended apache status shows 30 of 45 of these lines (replaced real hostname by SERVERNAME):
22-5 - 0/0/75 . 0.00 1813 0 0.0 0.00 1.17 ::1 SERVERNAME OPTIONS * HTTP/1.0 Some Apache Settings (Default settings):
- prefork module is enabled
- MaxKeepAliveRequests = 100
- Timeout = 300
- KeepAlive = On
- KeepAliveTimeout = 15
- MaxClients = 150
- MaxRequestsPerChild = 0
- StartServers = 5
- MinSpareServers = 5
- MaxSpareServers = 10
- MaxClients =150
- MaxRequestsPerChild = 0