Posts in category MySQL Server
Easy MySQL: transaction isolation and...
Clients often ask what the differences are between the various InnoDB isolation levels, or what ACID means. Here are some simple explanations for those that have not yet read the manual and committed it to memory.
READ UNCOMMITTED
Every select operates without locks so you don’t get consistency and might have dirt reads, which are pot [...]
Easy MySQL: how to backup databases t...
Here’s a simple answer to a simple question. “How do I run a backup of MySQL to another machine without writing to the local server’s filesystem?” – this is especially useful if you are running out of space on the local server and cannot write a temporary file to the filesystem during backups.
Method one ̵ [...]
How to get colored output from ‘...
For all of those linux users out there that have moved over to, or tried out, Solaris10 or OpenSolaris because they heard the tales of how MySQL is faster on Solaris… or perhaps you wanted to learn how to use Sol10 for the great features of Zones or the ZFS filesystem? Regardless of why you’re on it you are probably wondering wh [...]
Notes for installing MySQL 5.4.2 on O...
Some notes from my recent installation of MySQL 5.4.2-beta on a PPC G5 box running OSX 10.5.8. Hopefully these notes will save someone a bit of time when they begin the “I want to make my mac a development box” process. I’m not going to cover installing/configuring Apache and PHP since the web is full of those articles alr [...]
Another solution to an error
install_driver(mysql) failed: Can't load '/usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi/auto/DBD/mysql/mysql.so' for module DBD::mysql: /usr/lib64/libmysqlclient.so.15: version `libmysqlclient_15' not found (required by /usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi/auto/DBD/mysql/mysql.so) at /usr/lib64/perl5/ [...]
A quick rundown of per-thread buffers
I saw something interesting today when helping out someone on the #mysql IRC channel. It was a cnf file that was designed to destroy a server. Before I get into the why-not, here are the goods:
...snip...
read_buffer = 128M
join_buffer = 128M
key_buffer = 512M
max_allowed_packet = 200M
thread_stack [...]
Seeking volunteer test machines for M...
Monolith: MySQL server monitoring. I only have servers that run Redhat/Debian/Ubuntu Linux x86 and x86_64. I don’t have machines to test MySQL monitoring for the following OSes. Perhaps you would like to be a test candidate for the new version of Monolith? If so, let me know and you’ll be on the list, as well as get beta testing [...]
Update: OSS MySQL Monitoring Solution
Progress on the Open Source enterprise grade MySQL monitoring system; the schema for Monolith version 2 has been designed. Due to the many suggestions for features and the interest it has received I’ve put this on the front burner. That said, here is some more info on the next steps I’ll be taking.
Monitored servers will use a [...]
Request: What do you want in a OpenSo...
What would you like to see in a free enterprise-grade monitoring system for your daily MySQL needs?I’m rewriting Monolith – MySQL DBA Console from the ground up. This will be version 2 and I would like to get some input from the global MySQL community.So far I am going with the following; comment with any improvements/additions. [...]
MySQL and DNS woes?
A quick solution to a common problem: your MySQL server has thousands of connections, some or most are not persistent. Unless you say otherwise, MySQL will check connections hostnames against the system DNS server. While this is generally not a problem with low traffic, when you are dealing with many concurrent connections you are not only [...]
