dovecot - Aug 2021 - [OT] Re: What kind of search response time are you setting with solr full text search?

> I'm inclined to believe the problem is not that high up the food
> chain. Because when I query IMAP on a single folder over telnet
> following the instructions found here:
> https://doc.dovecot.org/configuration_manual/fts/solr/, imap reports
> that it's taking 3 to 4 seconds to return results:
> 
> a search text "maynez"
> a OK Search completed (3.386 + 0.001 + 0.250 secs).
> 
> This particular search returns a few hundred results.
> 
> The speed of the query changed depending on whether a lot of results
> are returned. So if I search on a nonsensical word like "zyzzix",
imap
> reports results nearly instantaneously:
> 
> a search text "zyzzix"
> a OK Search completed (0.012 + 0.000 + 0.006 secs).
I just did a quick test. I did a search over imap over telnet with fts 
plugins turned off and with them turned on.

The search time was no better with it on than off.

So I'm thinking I got something misconfigured somewhere. It seems IMAP 
may not be using solr to fetch results. But this would be odd since I 
definitely do see a big improvements in times with fts plugins turned on 
when using roundcube.

> The search time was no better with it on than off.
> 
> So I'm thinking I got something misconfigured somewhere. It seems IMAP
> may not be using solr to fetch results. But this would be odd since I
> definitely do see a big improvements in times with fts plugins turned
> on when using roundcube.
OK, I'm finally getting somewhere. Found this lead here: 
https://dovecot.org/pipermail/dovecot/2012-February/081514.html

"doveadm fts optimize" throws an error:

doveadm(root): Error: Couldn't drop privileges: User is missing UID (see 
mail_uid setting)


Checking /var/log/mail.err, I see a ton of these entries:

83353 Aug 25 14:53:22 email dovecot:
imap(s)<26536><gJ1Iw2bKKLh/AAAB>:
Error: fts_solr: received invalid uid '
83354 Aug 25 14:53:22 email dovecot: imap: Error: '
83355 Aug 25 14:58:05 email dovecot:
imap(s)<26637><Awma1GbKprh/AAAB>:
Error: fts_solr: received invalid uid '
83356 Aug 25 14:58:05 email dovecot: imap: Error: '
83357 Aug 25 15:26:58 email dovecot:
imap(s)<27217><TF0qOGfKort/AAAB>:
Error: fts_solr: received invalid uid '
83358 Aug 25 15:26:58 email dovecot: imap: Error: '
83359 Aug 25 15:27:11 email dovecot:
imap(s)<27217><TF0qOGfKort/AAAB>:
Error: fts_solr: received invalid uid '
83360 Aug 25 15:27:11 email dovecot: imap: Error: '
83361 Aug 25 15:27:36 email dovecot:
imap(s)<27217><TF0qOGfKort/AAAB>:
Error: fts_solr: received invalid uid '
83362 Aug 25 15:27:36 email dovecot: imap: Error: '

I think this will be nailed once I figure out this issue.