Re: Latest version of Hot Standby patch

Simon Riggs wrote:
> On Wed, 2009-01-07 at 15:43 +0200, Heikki Linnakangas wrote:
>> When there's no xids in the procarray, couldn't we just use 
>> latestCompletedXid instead of calling ReadNewTransactionId()?
> 
> latestCompletedXid is protected by ProcArrayLock so not much difference
> between those two.

The big difference is that we're already holding ProcArrayLock. You 
could read the value of latestCompletedXid before releasing 
ProcArrayLock, and wouldn't need the retry logic.

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