<transcript><audio_205>transaction on the same page as where a is that was updated by transaction T1 so now two transactions have made changes to the same page and remember we move stuff from the buffer pool to the disk in pages right so now this page has two different things from two different</transcript><transcript><audio_206>transactions T2 commits what do we do at this point if we said we can flush that page to dis to ensure that p2's changes are durable uh we will also carry along with</transcript><transcript><audio_207>us A's changes and A's outcome is uh T's outcome to a is not yet known we don't know what's going to happen because if we flush all of that to disk ultimately T2 could abort and we need to go unwind the changes that made it to disk okay so</transcript> transaction on the same page as where a is that was updated by transaction T1 so now two transactions have made changes to the same page and remember we move stuff from the buffer pool to the disk in pages right so now this page has two different things from two different transactions T2 commits what do we do at this point if we said we can flush that page to dis to ensure that p2's changes are durable uh we will also carry along with us A's changes and A's outcome is uh T's outcome to a is not yet known we don't know what's going to happen because if we flush all of that to disk ultimately T2 could abort and we need to go unwind the changes that made it to disk okay so
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