This commit improves major feature of GTM/GTM-Proxy, including

1) Correction of transaction bacukp to GTM-Standby.  Now it backs up
transaction handle and GXID, not proxy message from client.

2) Backup is written before response is	flushed	to the client.

3) Backup is optimizes so that no response will be written back
   from the standby if not needed.

4) Backup can be done synchronously or asynchronously. 	 In synchronous
   backup, each	message	flush to the client will be associated with
   synchronization of the message to the standby.

Also, one bug fix is included to make tcp_keepalives work to monitor
the client connection. 	 Server	connection monitoring will be included
in later patches.

0 files changed, 0 insertions, 0 deletions