Re: Wrong statistics for size of XLOG_SWITCH during pg_waldump.

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От movead.li@highgo.ca
Тема Re: Wrong statistics for size of XLOG_SWITCH during pg_waldump.
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Msg-id 2020101209463463842666@highgo.ca
обсуждение исходный текст
Ответ на Wrong statistics for size of XLOG_SWITCH during pg_waldump.  ("movead.li@highgo.ca" <movead.li@highgo.ca>)
Ответы Re: Wrong statistics for size of XLOG_SWITCH during pg_waldump.
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Thanks for reply.

>If you wish to add more information about a XLOG_SWITCH record, I
>don't think that changing the signature of XLogDumpRecordLen() is
>adapted because the record length of this record is defined as
>Horiguchi-san mentioned upthread, and the meaning of junk_len is
>confusing here.  It seems to me that any extra information should be
>added to xlog_desc() where there should be an extra code path for
>(info == XLOG_SWITCH).  XLogReaderState should have all the
>information you are lookng for.
We have two places to use the 'junk_len', one is when we show the 
detail record information, another is when we statistics the percent
of all kind of wal record kinds(by --stat=record). The second place
will not run the xlog_desc(), so it's not a good chance to do the thing.

I am still can not understand why it can't adapted to change the
signature of XLogDumpRecordLen(), maybe we can add a new function
to caculate the 'junk_len' and rename the 'junk_len' as 'skiped_size' or
'switched_size'?


Regards,
Highgo Software (Canada/China/Pakistan)
URL : www.highgo.ca
EMAIL: mailto:movead(dot)li(at)highgo(dot)ca

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