If you read about slave-readahead in my previous post on accellerating MySQL Replication, and if you got to the state of actually trying it out, then you really should download the 1.1 version that I just made available. Version 1.0 really was a pre-Alpha, and it had some memory allocation issues, as well as a simple multi-threading issue from my side, which had a really annying side-effect, mainly making the progrem not work at all in many circumstances.
The new version, 1.1, is in much better shape, really. I have run it for a while now, and except for the fact that it seems to do a better job, it also doesn't crash or consume enormous amount of memory after a while.
/Karlsson
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