Lockers keeps going higher...

[Simon Matter]

> This morning mail delivery via lmtp was slowing to a crawl. When I look
> in the logs, the only unusual thing that I see are the lines:
>
> Jul 13 15:32:13 ssmail lmtpunix[24474]: [ID 366844 local6.info] DBMSG:
> 27 lockers
> Jul 15 00:00:48 ssmail lmtpunix[4411]: [ID 366844 local6.info] DBMSG:
> 148 lockers
> Jul 15 00:10:48 ssmail lmtpunix[22170]: [ID 366844 local6.info] DBMSG:
> 618 lockers
> Jul 15 00:30:49 ssmail lmtpunix[3294]: [ID 366844 local6.info] DBMSG:
> 680 lockers
> Jul 15 08:10:58 ssmail lmtpunix[4002]: [ID 366844 local6.info] DBMSG:
> 1642 lockers
>
> It just keeps going up and up. Eventually I restarted master and then
> things went back down to about 20-25 lockers and my postfix delivery
> queue emptied from about 2500 queued messages to 50 in about 3 minutes.
> Is this related, or is this just a red herring?

My suggestion would be to switch to skiplist and get rid of those
"lockers". I never heard anyone complaining after switching to skiplist.
The listarchives can tell you more about it.

Regards,
Simon