Sander Smeenk:
> On this system, mailq is called quite often to keep track of the queue.
> Since the mailq calls are done asynchronous two calls might come in
> within the same second. I had a few 'showq -t unix -u -c' procs running,
> killed them, and now it's fast again. Next time i'll try and see if they
> give any usefull strace output.
If you run mailq commands in parallel, then everything will get
very slow with disk seek operations unless you have an SSD drive.
It is like running multple "find" commands. Don't do that.
As a safety feature, the number of showq processes is intentionally
limited in master.cf. Now you know why.
Wietse
