Comparing Indexing Speed + ZFS question

[Aki Tuomi]

On 18.04.2018 09:21, Qmail wrote:
> Hi, have two quick questions:
>
> I am re-indexing some large mailboxes and I wanted to get some
> opinions on these speeds. I ran a random sort command on an unindexed
> mailbox in order to get it to index. Results, for a mailbox with 10GB
> Inbox, spread in 65 000 files:
>
> 3 UID SORT (ARRIVAL) US-ASCII OR OR OR FROM "dfgfgfgf" SUBJECT
> "dfgfgfgf" TO "dfgfgfgf" CC "dfgfgfgf"
> a03 select INBOX
> * SORT
> 3 OK Sort completed (2455.549 + 0.122 + 1.477 secs).
>
> Index cache file at the end was 31MB in size: 30756376 Apr 18 02:14
> dovecot.index.cache
>
> Is that normal, slow or fast ?
>
>
> Second question is, how can I speed this up ? I store messages using
> Director over NFS , on top of ZFS. From what I've read it would be
> fairly safe to disable mail_fsync but I don't think that would help
> much with the indexing speed. Any other tips ?
>
>
>
>

Did you try running it twice?

Aki
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