Roundcube webmail slow loading

[patton]

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

[SKaero]

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.

[patton]

Hello @SKaero,

I checked dovecot logs, but can't find anything suspicious..

Here are the logs: https://www.swisstransfer.com/d/a780bb62-75cd-4f01-bee0-cfa5aef5393c

[SKaero]

You need the Roundcube imap logs since that would have the information on what command Roundcube is sending and timing for the response from the mail server.

[SKaero]

Based on the log file you sent me I didn't see any delay from the mail server but I also didn't the client try to load the Junk folder where the problem was shown in the screenshot. Did the problem occur while you captured that log?

[patton]

Thanks for your reply. I have sent you a latest imap_log.

[SKaero]

The log you sent doesn't show it loading the list of email in the sent folder. Can you check if there is a sort on the sent folder, sometime that causing the mail server response to be slow.