[a-guhan]

Issue #31 .

Even though snapshot minting has an interval Env configured, it is not being used properly because establishing the consistent LSN for snapshot in standby is dependent on running txns record from primary, so usually it is taking around 15 seconds for minter to acquire a snapshot, which result in heavy engine work to apply all the WAL buffered in recent queue.

1. We can have a dedicated connection to master for a configured (default 5 seconds) to execute the pg_log_standby_snapshot() function which writes the txn record in WAL which can be consumed by standby and quickly consistent LSN for the snapshot can be established.
2. Currently after reading the initial results from storage we apply all the buffered WAL in liner time, we can improve it by indexing with table.

[a-guhan]