Revision 208 of mycheckpoint, a MySQL monitoring solution, has been released. New and updated in this revision: Aggregation tables: aggregated data makes for fast reports on previously slow queries. Enhanced charting: interactive charts now present time stamps dynamically (see demo); "Zoom in" charts are available (see demo) on mycheckpoint's HTTP server. RPM distribution: a "noarch" [...]
Here's a few thoughts on current status and further possibilities for Facebook's Online Schema Change (OSC) tool. I've had these thoughts for months now, pondering over improving oak-online-alter-table but haven't got around to implement them nor even write them down. Better late than never. The tool has some limitations. Some cannot be lifted, some could. [...]
Revision 190 of mycheckpoint, a MySQL monitoring solution, has been released. New and updated in this revision: HTTP server: mycheckpoint can now act as a web server. Point your browser and start browsing through HTML reports. See mock up demo. Interactive charts: HTML line charts are now interactive, presenting with accurate data as you move [...]
This HOWTO discusses two (unrelated) issues with mylvmbackup: The minimal privileges required to take MySQL backups with mylvmbackup. Making (non compressed) file system copy of one's data files. Minimal privileges Some just give mylvmbackup the root account, which is far too permissive. We now consider what the minimal requirements of mylvmbackup are. The queries mylvmbackup [...]
Following up on Matt Reid's simple python, mysql connection and iteration, I would like to share one of my own, which is the base for mycheckpoint & openark kit scripts. It is oriented to provide with clean access to the data: the user is not expected to handle cursors and connections. Result sets are returned [...]
LVM uses copy-on-write to implement snapshots. Whenever you're writing data to some page, LVM copies the original page (the way it looked like when the snapshot was taken) to the snapshot volume. The snapshot volume must be large enough to accommodate all pages written to for the duration of the snapshot's lifetime. In other words, [...]
Revision 132 of mycheckpoint has been released. New and updated in this revision: Custom monitoring: monitoring & charting for user defined queries HTML reports for custom monitoring Process list dump upon alert notifications Custom monitoring & charts Custom monitoring allows the user to supply with a query, the results of which will be monitored. That [...]
I'm further developing a general log hook, which can stream queries from the general log. A particular direction I'm taking is to filter queries by their type of actions. For example, the tool (oak-hook-general-log) can be instructed to only stream out those queries which involve creation of a temporary table; or those which cause for [...]
I'm seeking input on a new openark kit utility I've started to implement. The tool, oak-hook-general-log, will hook up to a MySQL (>= 5.1) server, and stream the general log into standard output. It looks like this: bash$ python src/oak/oak-hook-general-log.py --socket=/tmp/mysql.sock --user=root 2010-03-21 10:18:42 root[root] @ localhost [] 79 1 Query SELECT COUNT(*) FROM City [...]
In response to Mark Callaghan's post mk-schema-change. I apologize for not commenting on the post itself, I do not hold a Facebook account. Anyway this is a long write, so it may as well deserve a post of its own. Some of the work Mark is describing already exists under openark kit's oak-online-alter-table. Allow me [...]