>> BTW, is there any reliable way to know a standby is promoting to
>> primary?
> 
> You can know that from the server log. But there is no way to do that
> via SQL, I think.

Ok. It seems I need to patch PostgreSQL.
--
Tatsuo Ishii
SRA OSS, Inc. Japan
English: http://www.sraoss.co.jp/index_en.php
Japanese: http://www.sraoss.co.jp

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