At Percona we provide services both Onsite - visiting the customers and Remote - logging in to their systems or communicating via email,phone,instant messaging.
We believe both approaches have their benefits and drawbacks and mixing them right way allows you to get your problems solved most efficient way.
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For the last couple of months, we’ve been quietly developing a MySQL protocol parser for Maatkit. It isn’t an implementation of the protocol: it’s an observer of the protocol. This lets us gather queries from servers that don’t have a slow query log enabled, at very high time resolution.
With this new functionality, it becomes possible for mk-query-digest to stand on the sidelines and watch queries fly by over TCP. It is only an observer on the sidelines: it is NOT a man in the middle like mysql-proxy, so it has basically zero impact on the running server (tcpdump is very efficient) and zero impact on the query latency. There are some unique challenges to watching an entire server’s traffic, but we’ve found ways to solve those. Some of them are harder than others, such as making sense of a conversation when you start listening in the middle. In general, it’s working very well. We can gather just about every bit of information about queries that mysql-proxy can, making this a viable way to monitor servers without the disadvantages of a proxy. In theory, we can gather ALL the same information, but in practice we are going for the 95% case.
Dear community,
The release 0.8 of the opensource backup tool for InnoDB and XtraDB is available for download.
Key features:
tar4ibd is made to be sure that read of InnoDB page is consistent. Before we had some complains what in stream mode some pages are getting corrupted, and we suspect tar can do read of pages in time when they changed. So we patches libtar to make read consistent.
Export is added to support moving .ibd tablespaces between servers.
The list of other features in the release includes:
Fixed bugs:
The binary packages for RHEL4,5, Debian, FreeBSD as well as source code of the XtraBackup is available on http://www.percona.com/mysql/xtrabackup/0.8/.
The project lives on Launchpad : https://launchpad.net/percona-xtrabackup and you can report bug to Launchpad bug system:
https://launchpad.net/percona-xtrabackup/+filebug. The documentation is available on our Wiki.
For general questions use our Pecona-discussions group, and for development question Percona-dev group.
For support, commercial and sponsorship inquiries contact Percona.
As you see MySQL is doing great in InnoDB performance improvements, so we decided to concentrate more on additional InnoDB features, which will make difference.
Beside ideas I put before http://www.mysqlperformanceblog.com/2009/03/30/my-hot-list-for-next-innodb-features/ (and one of them - moving InnoDB tables between servers are currently under development), we have few mores:
- Stick some InnoDB tables / indexes in buffer pool, or set priority for InnoDB tables. That means tables with bigger priority will be have more chances to stay in buffer pool then tables with lower priority. Link to blueprint https://blueprints.launchpad.net/percona-patches/+spec/lru-priority-patch
- Separate LRU list into several lists, and in this way it will allow us to emulate several buffer pool, with features to keep different tables in different buffer pools and also to decrease contention on buffer pool. Link https://blueprints.launchpad.net/percona-patches/+spec/multiple-lru-patch
- We are looking to include Waffle Grid into XtraDB releases with some additional features like caching buffer pool on SSD.
If ideas are interesting for you and you want to support them, contact us
With the growing adoption of Google’s User Statistics Patch**, the need for supporting scripts has become clear. To that end, we’ve created check-unused-keys, a Perl script to provide a nicer interface than directly querying the INFORMATION_SCHEMA database.
I have not got a chance to have a standard session on Velocity Conference this year, However I’m hosting the BOF. Bring your flash, IO Performance, and general performance stories and questions if you have any.
I also plan to attend the conference afternoon on Monday and mid day on Tuesday.
I will co-present in webinar on Performance Challenges and Solutions for IO Bound Workloads in MySQL. My part of the presentation will be speaking about why switching from CPU bound workload to IO bound is such an important event, how to prepare to it as well as how to keep your application performance good as the data growths.
The Brian’s portion of webinar will focus on the Schooner offering as example of flash based appliance - one of solutions I mention in my presentation.
It should be interesting whenever you’re interested in Schooner appliance offerings, flash or scaling MySQL in General.
You can follow this url to register.
Today marks the official launch of Percona.tv. We’ll be uploading technical screencasts, conference video, and anything else cool we can think up. If you’ve got ideas or requests, let us know and we’ll do our best to accommodate!
It is a known fact that ext3 is not the most efficient file system out there and for example file removals can be painfully slow and cause a lot of random I/O. However, as it turns out, it can sometimes have a much more severe impact on the MySQL performance that it would seem. When or why?
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