Monthly Archives - February 2019

Percona XtraDB Cluster 5.6.43-28.32 Is Now Available

Percona XtraDB Cluster 5.7

Percona is glad to announce the release of Percona XtraDB Cluster 5.6.43-28.32 on February 28, 2019. Binaries are available from the downloads section or from our software repositories.
This release of Percona XtraDB Cluster includes the support of Ubuntu 18.10 (Cosmic Cuttlefish). Percona XtraDB Cluster 5.6.43-28.32 is now the current release, based on the following:

Percona Server 5.6.43-84.3
Codership WSREP API release 5.6.42
Codership Galera library 3.25

All […]

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Percona XtraDB Cluster 5.7.25-31.35 Is Now Available

Percona XtraDB Cluster 5.7

Percona is glad to announce the release of Percona XtraDB Cluster 5.7.25-31.35 on February 28, 2018. Binaries are available from the downloads section or from our software repositories.
This release of Percona XtraDB Cluster includes the support of Ubuntu 18.10 (Cosmic Cuttlefish). Percona XtraDB Cluster 5.7.25-31.35 is now the current release, based on the following:

Percona Server for MySQL […]

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Percona Server for MongoDB 4.0.6-3 Is Now Available

Percona Server for MongoDB

Percona announces the release of Percona Server for MongoDB 4.0.6-3 on February 28, 2019. Download the latest version from the Percona website or the Percona software repositories.
Percona Server for MongoDB is an enhanced, open source, and highly-scalable database that is a fully-compatible, drop-in replacement for MongoDB 4.0 Community Edition. It supports MongoDB 4.0 protocols and drivers.
Percona Server for MongoDB extends the […]

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MySQL 8.0 Bug 94394, Fixed!

MySQL optimizer bugs

Last week I came across a bug in MySQL 8.0, which meant that the absence of mysql.user leads to auto-apply of –skip-grant-tables (#94394) would leave MySQL running in an undesirable state. My colleague Sveta Smirnova blogged about the issue and it also caught the interest of Valeriy Kravchuk in Fun with Bugs #80 – […]

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Charset and Collation Settings Impact on MySQL Performance

MySQL 8.0 utf8mb4

Following my post MySQL 8 is not always faster than MySQL 5.7, this time I decided to test very simple read-only CPU intensive workloads, when all data fits memory. In this workload there is NO IO operations, only memory and CPU operations.
My Testing Setup
Environment specification

Release | Ubuntu 18.04 LTS (bionic)
Kernel | 4.15.0-20-generic
Processors | physical […]

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