Due to continuous development and improvement, Percona Server for MySQL incorporates a number of improvements related to binary log handling and replication. This results in replication specifics, distinguishing it from MySQL Server. Temporary tables and mixed logging format Summary of the fix: As soon as some statement involving temporary tables was met when using a mixed binlog format, MySQL […]
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In this blog, I will provide answers to the Q & A for the Performance Schema for MySQL Troubleshooting webinar. First, I want to thank everybody for attending my March 1, 2018, webinar. The recording and slides for the webinar are available here. Below is the list of your questions that I was unable to answer […]
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In this blog post, we’ll look at using ProxySQL and VIRTUAL columns to solve object-relational mapping (ORM) issues. There are a lot of web frameworks all around. Programmers and web designers are using them to develop and deploy any website and web application. Just to cite some of the most famous names: Drupal, Ruby on […]
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In this post, I’ll discuss the fix for lp:1704195 (migrated to PS-2503), which prevents ANALYZE TABLE from blocking all subsequent queries on the same table. In November 2017, Percona released a fix for lp:1704195 (migrated to PS-2503), created by Laurynas Biveinis. The fix, included with Percona Server for MySQL since versions 5.6.38-83.0 and 5.7.20-18, stops ANALYZE TABLE from invalidating query and […]
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In this post, we’ll look at the MySQL 8.0 innodb_dedicated_server variable. MySQL 8.0 introduces a new variable called innodb_dedicated_server. When enabled, it auto tunes innodb_buffer_pool_size, innodb_log_file_size and innodb_flush_method at startup (if these variables are not explicitly defined in my.cnf). The new MySQL 8.0 variable automatically sizes the following variables based on the RAM size of […]
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From time to time I see pattern matching queries with conditions that look like this: “where fieldname like ‘%something%’ “. MySQL cannot use indexes for these kinds of queries, which means it has to do a table scan every single time. (That’s really only half true — there are the FullText indexes. In another blog […]
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In this blog post, we’ll look at how you can verify query performance using ProxySQL. In the previous blog post, I showed you how many information can you get from the “stats.stats_mysql_query_digest” table in ProxySQL. I also mentioned you could even collect and graph these metrics. I will show you this is not just theory, it […]
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In this blog, I will provide answers to the Q & A for the Basic Internal Troubleshooting Tools for MySQL Server webinar. First, I want to thank everybody for attending my February 15, 2018, webinar on troubleshooting tools for MySQL. The recording and slides for the webinar are available here. Below is the list of […]
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In this blog post, we’ll look at how to turn on binlog encryption in Percona Server for MySQL. Why do I need this? As you probably know, Percona Server for MySQL’s binlog contains sensitive information. Replication uses the binlog to copy events between servers. They contain all the information from one server so that it can […]
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Percona announces the release of Percona XtraDB Cluster 5.7.21-29.26 (PXC) on March 2, 2018. Binaries are available from the downloads section or our software repositories. Percona XtraDB Cluster 5.7.21-29.26 is now the current release, based on the following: Percona Server for MySQL 5.7.21 Galera/Codership WSREP API Release 5.7.21 Galera Replication library 3.23 Starting from now, Percona […]
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