tree fe33cf6cbc78777feeead5bba33569a42b86f7ac
parent f119d4c2579e31868a81cd868606802245b62ba4
author Nicolas Lacasse <nlacasse@google.com> 1464829351 -0700
committer Nicolas Lacasse <nlacasse@google.com> 1464889264 +0000

syncbase: garbage collect commited transactions.

This CL adds function gcTransactions to the transaction manager that
cleans up all commited transactions since the last uncommited
transaction.

The gcTransactions function runs in a loop every 100ms.  We will want to
tune that parameter, and possibly optimize the gcTransaction function in
other ways, since it blocks other transaction operactions while it runs.

Change-Id: Ibb276001f501368671e276af70ded91c4243d645