Re: Log rotation
От | Bruce Momjian |
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Тема | Re: Log rotation |
Дата | |
Msg-id | 200403141909.i2EJ9nT04484@candle.pha.pa.us обсуждение исходный текст |
Ответ на | Re: Log rotation (Tom Lane <tgl@sss.pgh.pa.us>) |
Ответы |
Re: Log rotation
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Список | pgsql-hackers |
Tom Lane wrote: > Bruce Momjian <pgman@candle.pha.pa.us> writes: > > What versions of syslog fsync, and where is the syslog.conf option. I > > don't see it on FreeBSD or Linux. > > It's a per-output-file option. My Linux manpage for syslogd quoth > > The - may only be used to prefix a filename if you want to omit > sync'ing the file after every write to it. > > I believe this notation is inherited from BSD. I don't see anything > about it in the HPUX man page for syslogd, though. I see no mention of that flag in Free/NetBSD, or bsdi. I do see a mention in Red Hat 9. Looking at my syslog source code, the only lines that get fsync'ed are lines from /dev/klog (kernel log messages). I think non-kernel messages use the /var/run/log socket. syslogd manual page says: Syslogd reads messages from the LOCAL domain socket /var/run/log, from an Internet domain socket specified in /etc/services,and from the special device /dev/klog (to read kernel messages). Messages received on the In- ternetand LOCAL domain sockets may be NULL terminated and may include a single trailing newline, any other non-printablecharacters are encoded into a visible representation by strvisx(3). I wonder if this fsync for PostgreSQL messages is some change made to Linux syslog. -- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610) 359-1001+ If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square, Pennsylvania19073
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