Re: pg_receivexlog and feedback message
| От | Fujii Masao |
|---|---|
| Тема | Re: pg_receivexlog and feedback message |
| Дата | |
| Msg-id | CAHGQGwGhd=XXhtze4fmBNE5-RKS7c0-u6ck7RUwcMHVPpCWXEw@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: pg_receivexlog and feedback message (Magnus Hagander <magnus@hagander.net>) |
| Ответы |
Re: pg_receivexlog and feedback message
|
| Список | pgsql-hackers |
On Sun, Jun 10, 2012 at 7:55 PM, Magnus Hagander <magnus@hagander.net> wrote:
> How about this?
+ /*
+ * Set flushed position to the last byte in the previous
+ * file. Per above we know that xrecoff%XLOG_SEG_SIZE=0
+ */
+ flushedpos = blockpos;
+ if (flushedpos.xrecoff == 0)
+ {
+ flushedpos.xlogid--;
+ flushedpos.xrecoff = XLogFileSize-1;
+ }
+ else
+ flushedpos.xrecoff--;
flushedpos.xrecoff doesn't need to be decremented by one.
If xrecoff % XLOG_SEG_SIZE = 0, the position should be the last
byte of previous (i.e., flushed) WAL file.
Regards,
--
Fujii Masao
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