search for: topfiles_bytes

...ast few days mails would pile up in the Postfix Queue, waiting to be delivered using the lmtp transport into dovecot. So dovecot was being slow, but why? After all, nothing changed. After reading some articles on stackoverflow I found a way of finding out which file gets the most IO: % sysdig -c topfiles_bytes; This command quickly pointed to ~/mdbox/mailboxes/INBOX/dbox-Mails/dovecot.index.tmp That file was written excessively. I then put ~/mdbox/mailboxes/INBOX/dbox-Mails/ into tmpfs and alas, the queue would drain quickly. But why is that? Why would the index file be updated so often? This is dov...

...Postfix Queue, waiting to be delivered using the > lmtp transport into dovecot. > > So dovecot was being slow, but why? After all, nothing changed. > > After reading some articles on stackoverflow I found a way of finding > out which file gets the most IO: > > % sysdig -c topfiles_bytes; > > This command quickly pointed to ~/mdbox/mailboxes/INBOX/dbox-Mails/dovecot.index.tmp > That file was written excessively. Was it one user's dovecot.index.tmp or for a lot of users? This means that dovecot.index is being rewritten, which should happen only once in a while, but n...