Siddharth Shah wrote:
>    I am not using wall based replication ? I no not have frequent & long
> transaction , need of checkpoints
> Just want to get what data resides in pg_xlog that it takes 16MB without
> any transactions.

The files are created 16MB long, it is faster to overwrite that than to
keep extending a shorter file. Since the WAL is written to with every
transaction it needs to be fast.

-- 
  Richard Huxton
  Archonet Ltd

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