Hi,
as we know there are 3 steps in XA transaction committing
1, prepare step
2, write binary log
3, commit step in engines
all these steps need a fsync(). Group commit strategy can make a group of
transactions durable with one fsync() at step 2 and step 3, which can lead to
dramatic performance enchance.
But in step 1, each transaction still do its own fsync(). so why not make
several transactions durable whith one fsync() in prepare step just like step 2
and 3, which I think can improve performanc further more ?
Thanks
2014-08-04
nanyi607rao
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