About Worklog
The Forge Worklog is the public collection of development and roadmap tasks
that MySQL engineers are either in the proces of working on, or are seeking
input from the MySQL user community in how to implement a feature or extension.
Feel free to comment on any worklog item you are interested in or have experience
using. MySQL developers are always eager to hear from you! You can read more about
Worklog on the
MySQL Forge Wiki.
Dec 19, 2009 @ 16:55 (re: WL#4007: Improve binlog writing speed by using pwrite)
It isn't clear how this helps with performance. The performance problem is too many fsyncs. Doing pwrite concurrently doesn't reduce the fsync rate (it might in some cases). Using group commit does.
Also, when an XID event is written at offset 200 in the binlog, it must wait for all
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