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Improve comment about why sleep is used by pg_standby to handle 'copy' 

file size problem.
This commit is contained in:
Bruce Momjian 2008-12-15 22:13:02 +00:00
parent 30c6202a2a
commit 1b92aeb93e
1 changed files with 6 additions and 7 deletions
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13
contrib/pg_standby/pg_standby.c
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@ -1,5 +1,5 @@
/*
* $PostgreSQL: pgsql/contrib/pg_standby/pg_standby.c,v 1.15 2008/12/15 21:39:25 momjian Exp $
* $PostgreSQL: pgsql/contrib/pg_standby/pg_standby.c,v 1.16 2008/12/15 22:13:02 momjian Exp $
*
*
* pg_standby.c
@ -179,12 +179,11 @@ CustomizableNextWALFileReady()
#ifdef WIN32
/*
* Windows reports that the file has the right number of bytes
* even though the file is still being copied and cannot be opened
* by pg_standby yet. So we wait for sleeptime secs before
* attempting to restore. If that is not enough, we will rely on
* the retry/holdoff mechanism. GNUWin32's cp does not have
* this problem.
* Windows 'cp' sets the final file size before the copy is
* complete, and not yet ready to be opened by pg_standby.
* So we wait for sleeptime secs before attempting to restore.
* If that is not enough, we will rely on the retry/holdoff
* mechanism. GNUWin32's cp does not have this problem.
*/
pg_usleep(sleeptime * 1000000L);
#endif