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10 Newer Entries Showing entries 61 to 70 of 17105 10 Older Entries

Displaying posts with tag: mysql (reset)

Linkbench for MySQL & MongoDB with a cached database
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I used linkbench for MySQL and MongoDB to understand OLTP performance on an interesting workload. Here I post results for a cached database and in a few days I will have more results for a database larger than RAM. The summary is that MySQL is a lot faster than MongoDB even when using the same storage engine (RocksDB). I don't know all of the reasons for this and it is possible I made a mistake because this is the first time I have run linkbenchX for MongoDB. …

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TOI wsrep_RSU_method in PXC 5.6.24 and up
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I noticed that in the latest release of Percona XtraDB Cluster (PXC), the behavior of wsrep_RSU_method changed somewhat.  Prior to this release, the variable was GLOBAL only, meaning to use it you would:

mysql> set GLOBAL wsrep_RSU_method='RSU';
mysql> ALTER TABLE ...
mysql> set GLOBAL wsrep_RSU_method='TOI';

This had the (possibly negative) side-effect that ALL DDL’s issued on this node would be affected by the setting while in RSU mode.

So, in this latest release, this …

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Deploy TwinDB agent using Chef on your MySQL fleet
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We are big fans of automation which is also one of the reasons why we started TwinDB. We want to remove the pain around manual redundant jobs and automate them so that you can focus on what is important for your business.

Why Chef?

Awesome Chef

Chef is a great example of how automation can be successfully applied to infrastructure such that your infrastructure becomes easily deployable, manageable, testable and well documented. Whenever, I talk about the benefits of using Chef, I greatly highlight how writing Chef cookbooks …

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Log Buffer #430: A Carnival of the Vanities for DBAs
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This Log Buffer Edition cuts through the crowd and picks some of the outstanding blog posts from Oracle, SQL Server and MySQL.


Oracle:

  • Continuous Delivery (CD) is a software engineering approach in which teams keep producing valuable software in short cycles and ensure that the software can be reliably released at any time.
  • Query existing HBase tables with SQL using Apache Phoenix. …

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MariaDB 10.0.20 Overview and Highlights
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MariaDB 10.0.20 was recently released, and is available for download here:

https://downloads.mariadb.org/mariadb/10.0.20/

This is the eleventh GA release of MariaDB 10.0, and 21st overall release of MariaDB 10.0.

There were no major functionality changes, but there was one security fix, 6 crashing bugs fixed, some general upstream fixes, and quite a few bug fixes, so let me cover the highlights:

  • Security Fix: Client command line option –ssl-verify-server-cert (and MYSQL_OPT_SSL_VERIFY_SERVER_CERT option of the client API) …
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MySQL Enterprise Audit – parsing audit information from log files, inserting into MySQL table
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The MySQL Enterprise Audit plug-in is part of the MySQL Enterprise Edition (available through a paid license). Basically, Enterprise Audit tracks everything that is happening on your MySQL server, and can be used to protect/detect the misuse of information, and to meet popular compliance regulations including HIPAA, …

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Percona Server 5.5.44-37.3 is now available
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Percona is glad to announce the release of Percona Server 5.5.44-37.3 on July 1, 2015. Based on MySQL 5.5.44, including all the bug fixes in it, Percona Server 5.5.44-37.3 is now the current stable release in the 5.5 series.


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Percona Server 5.6.25-73.0 is now available
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Percona is glad to announce the release of Percona Server 5.6.25-73.0 on July 1, 2015. Download the latest version from the Percona web site or from the Percona Software Repositories.

Based on …

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Using Cgroups to Limit MySQL and MongoDB memory usage
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Quite often, especially for benchmarks, I am trying to limit available memory for a database server (usually for MySQL, but recently for MongoDB also). This is usually needed to test database performance in scenarios with different memory limits. I have physical servers with the usually high amount of memory (128GB or more), but I am interested to see how a database server will perform, say if only 16GB of memory is available.

And while InnoDB usually respects the setting of innodb_buffer_pool_size in O_DIRECT mode (OS cache is not being used in this case), more engines (TokuDB for MySQL, MMAP, WiredTiger, RocksDB for MongoDB) …

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Monitoring MySQL Database Backups
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It’s important to monitor the (database) backups after you set-it-up. In this post we will answer a few how to monitor MySQL Database backups solutions – monitoring methods. We should see suggestions for: Monitoring Holland MySQL Backup Monitoring mysqldump backups Monitoring Xtrabackup using log Monitoring Backups using Nagios Usually we can have our backup script […]

10 Newer Entries Showing entries 61 to 70 of 17105 10 Older Entries

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