Re: CheckpointStartLock starvation

Tom Lane wrote:
> Heikki Linnakangas <heikki@enterprisedb.com> writes:
>> As a proposed fix, instead of acquiring the CheckpointStartLock in 
>> RecordTransactionCommit, we set a flag in MyProc saying "commit in 
>> progress". Checkpoint will scan through the procarray and make note of 
>> any commit in progress transactions, after computing the new redo record 
>> ptr, and wait for all of them to finish before flushing clog.
> 
> What sort of "wait for finish" mechanism do you have in mind?  While
> I've always thought CheckpointStartLock is a pretty ugly solution,
> I'm not sure the above is better.

I was thinking of XactLockTableWait.

--   Heikki Linnakangas  EnterpriseDB   http://www.enterprisedb.com