HTTP Server Is Either Slow Or Stops Responding When Installed On A NFS Mounted Drive (Doc ID 560853.1)

Last updated on JUNE 05, 2023

Applies to:

Symptoms

If HTTP Server is delivering pages slowly:

• Accessing the HTTP Server for a static page is extremely slow.
• The page displayed in about 10-30 seconds.
• If the page is requested again after it is displayed, then it does display normally with no delay.
• After waiting a period of time, then if the same static page is requested again it will have a 20-30 second delay.
• There are no errors recorded in logs or any other information in any other logs

If HTTP Server is not responding:

• OPMN is restarting HTTP Server because it cannot ping it
• From the $ORACLE_HOME/opmn/logs/ipm.log:

• The $ORACLE_HOME/Apache/Apache/logs/access_log shows that requests stop just before it cannot be pinged.
• This occurs randomly with hardly anyone using the system
• When it stops responding, the number of httpd processes is well below the MaxClients value set in $ORACLE_HOME/Apache/Apache/conf/httpd.conf
• The "top" command shows no httpd processes consuming large amounts of CPU before the crash.
• "netstat" output looks normal
• The same problem occurs if HTTP Server is started outside of OPMN i.e $ORACLE_HOME/Apache/Apache/bin/.apachectl start
•  A small load test accessing index.html, shows that HTTP Server stops accepting requests after a short period of time.
• At the point it stops accessing requests, netstat shows that the Listen port is still available, and its still possible to telnet to the Listen port. However a GET request from the telnet session, and a request from a browser just hang.
• A "ps -edf | grep httpd" shows that httpd processes still exist, but are nowhere near MaxClients.
• This proves the issue in with HTTP Server itself.

Cause

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In this Document

Symptoms

Cause

Solution

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