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+Process Tracing
+===============
+
+If a Dovecot's process hangs or is just really slow, the best way to debug it
+is to see what it's really doing. Typically you'd be looking into imap or pop3
+processes.
+
+Linux
+-----
+
+---%<-------------------------------------------------------------------------
+strace -tt -o log -p <process pid>
+---%<-------------------------------------------------------------------------
+
+BSDs, OS X <= 10.4
+------------------
+
+---%<-------------------------------------------------------------------------
+# enable process tracing
+ktrace -f log -p <process pid>
+# do whatever makes it break, then stop the process tracing:
+ktrace -C
+# and see what it's done:
+kdump -T -f log
+---%<-------------------------------------------------------------------------
+
+OS X >= 10.5
+------------
+
+---%<-------------------------------------------------------------------------
+dtruss -p <process id>
+---%<-------------------------------------------------------------------------
+
+Solaris
+-------
+
+---%<-------------------------------------------------------------------------
+truss -d -r0 -w1 -o log -p <process pid>
+---%<-------------------------------------------------------------------------
+
+'-r0' and '-w1' cause all IMAP input/output to be logged. '-d' adds timestamps
+to the log.
+
+(This file was created from the wiki on 2019-06-19 12:42)