On 12/15/2014 08:51 PM, Simon Riggs wrote:
Currently, WALReceiver writes and fsyncs data it receives. Clearly,
while we are waiting for an fsync we aren't doing any other useful
work.
Following patch starts WALWriter during recovery and makes it
responsible for fsyncing data, allowing WALReceiver to progress other
useful actions.
What other useful actions can WAL receiver do while it's waiting? It
doesn't do much else than receive WAL, and fsync it to disk.
- Heikki
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