<transcript><audio_310>are ready to commit I the first transaction will come it wait for that page to come back the other transaction cannot come till the page comes back so now you're blocking transactions from tens of milliseconds which is an eternity you still have a pretty slow system much</transcript><transcript><audio_311>better than the no steel force uh policy that we had but can we make it better so most systems for high performance will do something called group commit which is a very simple idea is that I'm going</transcript><transcript><audio_312>to batch up the Comets that are coming together I'm going to pick an interval like 5 milliseconds or something like that is pretty common and even though a transaction is ready to commit like T1 comes in creates its stuff in the uh buffer pool here it's in the right ahead</transcript><transcript><audio_313>buffer pool now I'm not showing the data buffer pool right remainder of this uh class will only care about the right ahead log buffer pole okay or the log manager buffer pole this comes in starts to go and that</transcript> are ready to commit I the first transaction will come it wait for that page to come back the other transaction cannot come till the page comes back so now you're blocking transactions from tens of milliseconds which is an eternity you still have a pretty slow system much better than the no steel force uh policy that we had but can we make it better so most systems for high performance will do something called group commit which is a very simple idea is that I'm going to batch up the Comets that are coming together I'm going to pick an interval like 5 milliseconds or something like that is pretty common and even though a transaction is ready to commit like T1 comes in creates its stuff in the uh buffer pool here it's in the right ahead buffer pool now I'm not showing the data buffer pool right remainder of this uh class will only care about the right ahead log buffer pole okay or the log manager buffer pole this comes in starts to go and that
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