Hi all, A few days back, I faced a problem where I *pg_start_backup('label') *was hang in the server forever. I stopped the process and then used *pg_start_backup('label',true) *and it worked.
Now I am trying to investigate why I need to use true as second parameter and read the doc "There is an optional second parameter of type boolean. If true, it specifies executing pg_start_backup as quickly as possible. This forces an immediate checkpoint which will cause a spike in I/O operations, slowing any concurrently executing queries." I tried to regenerate the scenario where *pg_start_backup('label') *hanged and I failed. Any idea, how can I regenerate that issue to investigate. I am using Postgresql 9.2. Thanks.