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Understanding GCache and Record-Set Cache in Percona XtraDB Cluster

 | April 11, 2016 |  Posted In: MySQL, Percona XtraDB Cluster

In this blog, we will examine the differences between GCache and Record-Set Cache in Percona XtraDB Cluster. In Percona XtraDB Cluster (PXC), there is the concept of GCache and Record-Set cache (which can also be called transaction write-set cache). The use of these two caches is often confusing if you are running long transactions, as both of […]

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How to calculate the correct size of Percona XtraDB Cluster’s gcache

 | September 8, 2014 |  Posted In: Insight for DBAs, MySQL, Percona MySQL Support, Percona Software, Percona XtraDB Cluster

When a write query is sent to Percona XtraDB Cluster all the nodes store the writeset on a file called gcache. By default the name of that file is galera.cache and it is stored in the MySQL datadir. This is a very important file, and as usual with the most important variables in MySQL, the […]

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