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pgrep is a sweet tool for finding processes. You can find all your mongrels, for example, without having the problems of running
ps aux | grep ruby. It’s in the
proctools package on most linux/unix operating systems. For example, on osx use
sudo port install proctools
kill -482 kills all processes in the group 482. This is great for killing all the children of a daemon like
ps shows the process group id next to the process id.
monit doesn’t have great support for figuring out what happens when a start/stop command runs. It can fail silently, for example. One (bad) way of debugging this is to add
echo to dump debugging info to a temporary file before and after these commands. Rumor has it that
god doesn’t have these problems…
- we’ve heard a rumor that
Marshal.dump(object) uses a temporary file on disk! This would be slower than it needed to be. Perhaps this is to deal with dumping objects to large to fit in RAM?