Biping MENG wrote:
Unsolved problems:
Actually I ran the "readwrite" series of sysbenches as well. But
encountered errors at concurrency level of 2048. So the result is not
complete for "readwrite".
Don't run readwrites on InnoDB with concurrency levels greater than
1024. There is a hard limit of 1024 transactions in the concurrent lock
graph currently and deadlocks and undefined behaviour are known to occur
when concurrency exceeds 1024. This is a known issue that Oracle (or
maybe Percona?) has developed a beta solution for and hopefully will
find its way into the next plugin version, at which point Drizzle will
of course pull in the improvements.
Cheers!
jay
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