--On 16 November 2018 13:52 +1100 ellie timoney <el...@fastmail.com> wrote:
Since you've recently upgraded from 2.3 to 2.5, it might be a good
opportunity to migrate your Cyrus databases to one of the other database
backends such as twoskip or skiplist? It looks like the problems you are
having are specifically in the berkeley backend so I think they should be
resolved just by switching to other backends. The 'cvt_cyrusdb' tool is
able to convert database formats, and you'll also want to update your
various foo_db settings in imapd.conf to specify your new database format.
Hi,
Thanks for the reply - we recently moved from 2.5.3 I think it was to
2.5.12 - i.e. within 2.5.x.
As far as I'm aware - all our DB's are already twoskip - certainly running
"files" against anything ending in '.db' returns "Cyrus twoskip DB" - the
only ones that don't, are the files in the 'db' directory - these return as
a mix of 'binary' or 'Applesoft BASIC' and other weirdness - as 'file'
doesn't know what they are - I don't either, all I know is after the 'db5'
PANIC messages - shutting down, then clearing out __db.001, __db.002,
__db.003 and 'skipstamp' and restarting appears to fix the problem for a
while.
If you need to stick with Berkeley DB for some reason, the info-cyrus
list might have active subscribers that use this database and might be
able to provide guidance (though I'm not directly aware of any)
Hehe, no we don't need to stick with Berkeley DB - and, as I said - as far
as I'm aware, we're entirely twoskip based.
Using Google I was able to find one other reference to 'DBERROR db5:
pthread suspend failed: Invalid argument' - again, DB compatibility was
mentioned (and apparently ruled out) - leaving a question over, maybe it's
a bug?
I could really do with someone confirming the files in 'db/' - are 'fine as
they are' (i.e. should not return a file type of 'twoskip' etc.) - and any
other suggestions for what might be causing this - or any way of getting
some more debug info.
We have two IMAP servers on identical hardware - only the one that's
heavily loaded encounters this issue (so far).
Regards,
-Karl
