Aleph www_server or pc_server Not Responding During Peak Hours
- Article Type: General
- Product: Aleph
- Product Version: 22
Problem Symptoms:
- pc_server or www_server stop responding to requests
- No error message is displayed
- Only after restarting the process, it starts working again
- Max descriptors is set to a low number (under 1024). It can be checked using the command:
ulimit -a | gr
Cause:
If the max descriptors value is too low, Aleph cannot open enough connections to serve all users and it therefore stops responding when it reaches the limit.
Resolution:
Increase the max descriptors to 4096 from user root, using the command:
projadd group.exlibris
(Response) projmod -sK "process.max-file-descriptor=(priv,4096,deny)" group.exlibris
Additional Information
For Aleph to work and serve users, it opens connections in the OS. When there are many users, it opens many connections. If there is a limit to the number of connection then the Aleph processes will not be able to open (in Sun they are called files or descriptors)
- Article last edited: 2/25/2014