benchbase icon indicating copy to clipboard operation
benchbase copied to clipboard

aborted transactions in Wikipedia

Open timveil opened this issue 2 years ago • 1 comments

If you look at any recent run of wikipedia you will see that 3 of the procedures fail 100% of the time with "aborted" transactions. Upon further inspection i think this was unintended but i'd like to confirm.

Aborted Transactions:
com.oltpbenchmark.benchmarks.wikipedia.procedures.UpdatePage/03                  [ 4170] ******
com.oltpbenchmark.benchmarks.wikipedia.procedures.GetPageAnonymous/04            [54069] ********************************************************************************
com.oltpbenchmark.benchmarks.wikipedia.procedures.GetPageAuthenticated/05        [  585] 

The cause of this appears to be that the runner logic essentially creates new page variables when executing the above procedures instead of referencing existing pages previously created. In other words, instead of doing lookups using existing data, the code generates keys that don't already exist in the database... thus always returning 0 records. The fix here is to ensure that the above procedures get a handle on an existing page.

I have a fix completed and tested but want to open this issue for history and discussion if i'm missing something.

timveil avatar Mar 03 '22 16:03 timveil

a good example of this is here... https://github.com/cmu-db/benchbase/actions/runs/1918000781. if you look at the postgres run you see the following...

Completed Transactions:
com.oltpbenchmark.benchmarks.wikipedia.procedures.AddWatchList/01                [ 633] 
com.oltpbenchmark.benchmarks.wikipedia.procedures.RemoveWatchList/02             [ 609] 
com.oltpbenchmark.benchmarks.wikipedia.procedures.UpdatePage/03                  [   0] 
com.oltpbenchmark.benchmarks.wikipedia.procedures.GetPageAnonymous/04            [   0] 
com.oltpbenchmark.benchmarks.wikipedia.procedures.GetPageAuthenticated/05        [   0] 

Aborted Transactions:
com.oltpbenchmark.benchmarks.wikipedia.procedures.UpdatePage/03                  [ 4113] 
com.oltpbenchmark.benchmarks.wikipedia.procedures.GetPageAnonymous/04            [54020] 
com.oltpbenchmark.benchmarks.wikipedia.procedures.GetPageAuthenticated/05        [  626]

timveil avatar Mar 03 '22 16:03 timveil