Reducing delay

Artifical delay used for synchrony simulation has been reduced.
Previously it was too large that some decisions were received before
receiving requests.

Signed-off-by: Vidhoon Viswanathan <vidhu2366@gmail.com>
Enabling read only command execution

Uses batch mode operation for update commands.
Keeping batch size as 1 makes read command processing
instantaneous.

Signed-off-by: Vidhoon Viswanathan <vidhu2366@gmail.com>