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Showing entries 1 to 4

Displaying posts with tag: dim_STAT (reset)

MySQL Performance: Collecting stats from your workload
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Pretty often I was asked by many people about solutions I'm using while analyzing MySQL performance issues and generating various graphs presented in my reports and blog posts.. - Well, I've always used and continue to use dim_STAT - the tool I'm developing myself since 15 years now, and which is freely available on this site :-) The tool is mainly collecting any kind of stats from the system and applications, and then giving you a way to analyze them live or later via web interface - nothing new now days, but well, I have my habits, like to play with collected data and want to know exactly what I'm …

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MySQL Performance: Improving Stability
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Huge performance improvement was came with MySQL 5.5.4, and looking on the following picture it's very easy to see why:

It's a one hour Read+Write dbSTRESS workload with 32 sessions running non-stop on 16 cores server. The left part of the picture corresponds to MySQL 5.1 activity, and the right one to MySQL 5.5.4. The first graph represents TPS levels, and the second one - the mutex waits observed during each test.

Even without going in details you may see how dramatically were reduced mutex waits! And I would say one of the greatest InnoDB features was a compact presentation of the "show innodb mutex" output which gave the way to monitor …

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New features in dim_STAT v.8.5 for InnoDB Monitoring
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Last week the new version 8.5 of dim_STAT was shipped. Along with other new features, there is a new Add-On was introduced since this version: innodbMUTEX. The data collecting by this Add-On are based on the "show engine innodb mutex" output. And it's not only able to scan the "standard" output, but also the "extended" output as well (by extended I mean if with debug options or with a little bit of hacking you'll force InnoDB to print other mutex wait values - they are already present within a code, but by default enabled only for debugging currently). For example in my case I wanted to analyze if in every case a mutex having the highest number of waits/sec will …

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Performance Trainings & Conferences in Kiev
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Last week I've participated in several Performance Conferences and Trainings in Kiev. Events mainly were dedicated to the latest improvements within MySQL performance, as well Solaris and Oracle tuning / performance analyzing and best practices. The week was very hot :-) but I've enjoyed every day discussing with creative and smart people! People hungry on knowledge and ready to stay 2 hours more overnight outpassing all allowed timing - it was a real pleasure to share all I know! :-))

So, I'd like to thank all participants! As well Sun@Kiev and …

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Showing entries 1 to 4

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