Introduce configurable PULL_BATCH_COUNT and DELTA_COUNT #57
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On tables with high volume workloads,
having the ability to tune PULL_BATCH_COUNT
and DELTA_COUNT is nice for faster catchup and swap.
The default values are 1000 and 20 respectively. Which means,
in one pass pg-osc will replay 1000 rows and if the count is <20
then it will perform the swap and replay.
By introducing new cli flags (
--pull-batch-count
,--delta-count
),these figures can be tuned further
Fixes: #21