Thanks for replying.
But I could't find  relation between the RequestXLogSwitch function and the 
error I met.
For perfromance purpose , I change the pg_start_backup checkpoint type from 
CHECKPOINT_WAIT to  CHECKPOINT_IMMEDIATE, does it matter?

------------------                               
Richard
2010-08-05

-------------------------------------------------------------
发件人:Tom Lane
发送日期:2010-08-05 22:04:30
收件人:Richard
抄送:pgsql-hackers
主题:Re: [HACKERS] Online backup cause boot failure, anyone know why?

"Richard" <husttrip...@vip.sina.com> writes:
> PS : I am using PG 8.3.7

I believe there's a related bug fix in 8.3.8.

BTW, -hackers is not the place for this type of question.

                        regards, tom lane

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