Dear all,
I am experiencing a severe performance issue with Roundcube webmail v1.6.16 on a specific cPanel account. When users log in, the inbox folder (and occasionally other folders) takes anywhere from 2 to 4 minutes to load.
The cPanel account has plenty of room to breathe, so I don't believe it's a standard resource starvation issue. Here are the CloudLinux LVE limits and current usage details for this account:
- CPU: 2 Cores
- RAM: 4 GB
- Entry Processes (EP): 70
- Number of Processes (NPROC): 200
- I/O Usage: 20 Mb/s
- IOPS: 2024
- Disk Space: 150 GB allocated (currently at ~50% usage)
Email Account Limits: All accounts are set to Unlimited storage.
Any help or direction on which logs to tail would be greatly appreciated!
Best regards
The most likely source of the delay is the the mail server. If you have access to the root of the server you could enable imap_debug in the Roundcube config and see what commands are being sent to the mail server and the time its taking to respond.