reconstruct Performance

The time it takes reconstruct to perform an operation depends on the following factors:

• The kind of operation being performed and the options chosen

• Disk performance

• The number of folders when running reconstruct -m

• The number of messages when running reconstruct -r

• The overall size of the message store

• What other processes the system is running and how busy the system is

• Whether or not there is ongoing POP, IMAP, HTTP, or SMTP activity

The reconstruct -r option performs an initial consistency check; this check improves reconstruct performance depending on how many folders must be rebuilt.

The following performance was found with a system with approximately 2400 users, a message store of 85GB, and concurrent POP, IMAP, or SMTP activity on the server:

• reconstruct -m took about 1 hour

• reconstruct -r -f took about 18 hours

A reconstruct operation may take significantly less time if the server is not performing ongoing POP, IMAP, HTTP, or SMTP activity.