Sendmail will use by default a single mail queue. This is what most users will need, and if you don’t have any special requirement you will not care about this. Still for high traffic mail servers it might be useful to split the queue over several directories, as thousands of files in a single directory will become a performance penalty at some point and also processing the queue sequentially will become very slow. This post will show how we can implement multiple mail queues with modern sendmail versions.

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I just stumbled across this interesting mysql tuning script called MySQLTuner. Don’t see this (or any other similar script) as the magical tool that will optimize your mysel server… There is no such thing, because there are so many different applications and each will require its specific database tunings.
Still, mysqltuner can be very useful tool in many cases, like for ex:

• it gives a quick overview on your running mysql configuration and some common sense recommendations.
• i really liked how it computes the total amount of memory needed for the current configuration (assuming all global buffers will be used and the maximum number of threads being connected).
• very simple usage: you just have to download and run it.

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