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formula about the number of WAL files - Mailing list pgsql-docs

From Fujii Masao
Subject formula about the number of WAL files
Date
Msg-id AANLkTik0sqru9oMZeTL4vnFkAaDYZB=-Meonv9gnroiu@mail.gmail.com
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Responses Re: formula about the number of WAL files  (Simon Riggs <simon@2ndQuadrant.com>)
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Hi,

----------------
29.4. WAL Configuration

There will always be at least one WAL segment file, and will normally not
be more than (2 + checkpoint_completion_target) * checkpoint_segments + 1
or checkpoint_segments + wal_keep_segments + 1 files.
----------------

The above formula is wrong. The correct is

    (2 + checkpoint_completion_target) * checkpoint_segments +
wal_keep_segments + 1

The attached patch fixes this fault.

Regards,

--
Fujii Masao
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center
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