Justin Pryzby <pryzby@xxxxxxxxxxxxx> writes: > On Thu, Mar 08, 2018 at 01:57:06PM -0500, Tom Lane wrote: >> PID 20488 is evidently waiting for PID 6471 to finish its transaction. >> What's that one doing? > Um, I thought I had kept track of all two pids but looks not.. > query | SELECT pg_export_snapshot(); pg_export_snapshot doesn't block for other transactions, though. Further down, you have output that confirms that: > 6471 | idle in transaction | psql | SELECT pg_export_snapshot(); That SELECT is the most recently completed command, not the current one. So now the question is what the connected application is waiting for before committing. regards, tom lane
