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Displaying posts with tag: percona server (reset)
Percona Server 5.5.48-37.8 is now available


Percona is glad to announce the release of Percona Server 5.5.48-37.8 on March 4, 2016. Based on MySQL 5.5.48, including all the bug fixes in it, Percona Server 5.5.48-37.8 is now the current stable release in the 5.5 series.

Percona Server is open-source and free. Details of the release can be found in the 5.5.48-37.8 milestone on Launchpad. Downloads are available here and from the …

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Exploring Metadata Locks with gdb - Studying Simple Case on Percona Server 5.7

I had forgotten the topic of studying metadata locks with gdb for quite a some time. Now that I've upgraded to Percona Server 5.7 and enjoy the remaining of my last free day as an independent MySQL Support Engineer doing nothing but some blogging, I think it's time to get back to gdb interactive sessions and try to answer the question I've got from customer back in Percona but had no chance to answer.

In a bit rewritten way, it sounded as follows:
"Do ALTER TABLE ... STATS_AUTO_RECALC=1" and the reverse ALTER
TABLE...STATS_AUTO_RECALC=default block select, update, delete, and insert on the table?
"There are two ways to answer this question. First, we can just try to …

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On Upgrades to Percona Server 5.7 GA: Ubuntu 14.04 Case

After upgrading Percona Server 5.6.28 (and "full stack" of Percona software) to 5.7.10-3 GA on CentOS 6 and building it from Git Source on Fedora Core 23 yesterday, I've decided to spend some time upgrading Percona Server on my netbook that plays a role of "home build/test/VMs server" and runs under Ubuntu 14.04:
openxs@ao756:~$ uname -a
Linux ao756 3.13.0-77-generic #121-Ubuntu SMP Wed Jan 20 10:50:42 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
openxs@ao756:~$ cat /etc/issue
Ubuntu 14.04.4 LTS \n \lIt had the following set of Percona packages (as a result of some tests with Percona XtraDB Cluster I had to use sometime while working there) and mysqld process running after OS …

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Percona Server 5.7.10-3 GA is now available

Percona is glad to announce the first GA release of Percona Server 5.7.10-3 on February 23, 2016. Download the latest version from the Percona web site or from the Percona Software Repositories.

Based on MySQL 5.7.10, including all the bug fixes in it, Percona Server 5.7.10-3 is the current GA release in the Percona Server 5.7 series. All of Percona’s software is open-source …

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Percona Server 5.7.10-2 second RC available

Percona is glad to announce the second release candidate of Percona Server 5.7.10-2 on February 8, 2016. Download the latest version from the Percona web site or from the Percona Software Repositories.

Based on MySQL 5.7.10, including all the bug fixes in it, Percona Server 5.7.10-2 is the current Release Candidate release in the Percona Server 5.7 series. All of Percona’s …

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Measuring Percona Server Docker CPU/network overhead

Now that we have our Percona Server Docker images, I wanted to measure the performance overhead when we run the database in the container. Since Docker promises to use a lightweight container, in theory there should be very light overhead. We need to verify that claim, however. In this post I will show the numbers for CPU and network intensive workloads, and later I will take a look at IO.

For the CPU-bound load, I will use a sysbench OLTP read-only workload with data fitting into memory (so there is no IO performed, and the execution path only goes through the network and CPU).

My server is 24 cores (including hyper-threads), with Intel(R) Xeon(R) CPU E5-2643 v2 @ …

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Experimental Percona Docker images for Percona Server

Docker is incredibly popular tool for deploying software, so we decided to provide a Percona Docker image for both Percona Server MySQL and Percona Server for MongoDB.

We want to create an easy way to try our products.

There are actually some images available from https://hub.docker.com/_/percona/, but these images are provided by Docker itself, not from Percona.

In our images, we provide all the varieties of storage engines available in Percona Server (MySQL/MongoDB).

Our images are available from https://hub.docker.com/r/percona/.

The simplest way to get going is to run the following:

docker run --name ps -e MYSQL_ROOT_PASSWORD=secret -d …
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Percona Server 5.6.28-76.1 is now available

Percona is glad to announce the release of Percona Server 5.6.28-76.1 on January 12, 2016. Download the latest version from the Percona web site or from the Percona Software Repositories.

Based on MySQL 5.6.28, including all the bug fixes in it, Percona Server 5.6.28-76.1 is the current GA release in the Percona Server 5.6 series. Percona Server is open-source and free – …

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Percona Server 5.5.47-37.7 is now available


Percona is glad to announce the release of Percona Server 5.5.47-37.7 on January 12, 2016. Based on MySQL 5.5.47, including all the bug fixes in it, Percona Server 5.5.47-37.7 is now the current stable release in the 5.5 series.

Percona Server is open-source and free. Details of the release can be found in the 5.5.47-37.7 milestone on Launchpad. Downloads are available …

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Exploring Metadata Locks with gdb - Double Checking the Initial Results

Some results in my initial post in this series led me to questions that I'll try to answer here. First of all, I noted that SELECT from a single table ended up with just one metadata lock request:

(gdb) b MDL_request::init
Breakpoint 1 at 0x648f13: file /usr/src/debug/percona-server-5.6.27-76.0/sql/mdl.cc, line 1266.
Breakpoint 2 at 0x648e70: file /usr/src/debug/percona-server-5.6.27-76.0/sql/mdl.cc, line 1245.
warning: Multiple breakpoints were set.
Use the "delete" command to delete unwanted breakpoints.
(gdb) c
Continuing.
[Switching to Thread 0x7ff224c9f700 (LWP 2017)]

Breakpoint 2, MDL_request::init (this=0x7ff1fbe425a8,
    mdl_namespace=MDL_key::TABLE, db_arg=0x7ff1fbe421c8 "test",

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