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Displaying posts with tag: percona monitoring plugins (reset)
Inexpensive SSDs for Database Workloads

The cost of SSDs has been dropping rapidly, and at the time of this writing, 2.5-drives have reached the 1TB capacity mark.  You can actually get inexpensive drives for as little as 60 cents per GB. Even inexpensive SSDs can perform tens of thousands of IOPs and come with 1.5M – 2M hous MTBF and a 5-year warranty: check out the Intel SC S3500 specs as an example. There is however one important factor you need to take into account when considering  SSDs as opposed to conventional hard drives – Write Endurance.

Many of us have heard about SSDs having limits in terms of how many writes SSDs can handle, many however assume this is what is already accounted for in the warranty period and so if the hard drives claim to have sequential write speed of 450MB/sec and a warranty of 5 years we expect …

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Percona Monitoring Plugins 1.0.4 release: Now with Galera graphs

Percona is glad to announce the release of Percona Monitoring Plugins 1.0.4. The components are designed to integrate seamlessly with widely deployed solutions such as Nagios and Cacti, and are delivered in the form of templates, plugins, and scripts.

Changelog:

* Added Galera/MySQL Monitoring Template for Cacti
* Added “Disk Read/Write Time per IO Request (ms)” graph
* Added “MySQL InnoDB Buffer Pool Efficiency” graph
* Switched ss_get_mysql_stats.php to PHP MySQLi extension and made it working with SSL (bug 1193097)
* Added user info to the max_duration check of pmp-check-mysql-innodb plugin (bug 1185513)
* ss_get_mysql_stats.php default values for ‘$status’ array were null instead of 0 (bug 1070268)
* Introduction of innodb_read_views_memory overrode the InnoDB total memory allocated …

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Percona Monitoring Plugins fix: Query Response Time

After switching from the Better Cacti Templates to the Percona Monitoring Plugins we suffered from the Query Response Time and the Query Time Histogram not graphing at all.

It took me a while to figure out why our new instance wasn’t graphing: the response time query was performing and the script was picking up its values. Also the rrd files were created but for some bizarre reason all values were set to “NaN”, in rrd/cacti terms: Not a Number. If you search on that subject you will come across a lot of (forum) postings stating you need to change your graph type to “GAUGE” or change the MIN/MAX values for your data templates. Strange as this was already set to a minimum of 0 and a maximum of an unsigned 64 bit integer.

After running the …

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