Attachment 18354 Details for Bug 29600 – Patch 2/2: (fax) add metalogd buffering information

[patch] Patch 2/2: (fax) add metalogd buffering information

faq.diff-add_metalog_buffering (text/plain), 1.53 KB, created by Sven Vermeulen (RETIRED) on 2003-09-26 02:25:09 UTC

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Creator: Sven Vermeulen (RETIRED)

Created: 2003-09-26 02:25:09 UTC

Size: 1.53 KB

patch

obsolete

>--- ../cvs/htdocs/doc/en/faq.xml	2003-09-25 17:42:42.000000000 +0200
>+++ faq.xml	2003-09-26 11:20:22.000000000 +0200
>@@ -94,6 +94,7 @@
> <ul>
> <li><uri link="#doc_chap6_sect1">ReiserFS and filesystem corruption issues -- how to fix'em, etc</uri></li>
> <li><uri link="#doc_chap6_sect2">How to I view the timestamps in /var/log/syslog.d, etc. on a pre-1.0_rc5 Gentoo system? </uri></li>
>+<li><uri link="#doc_chap6_sect3">Metalogd doesn't log in real time!</uri></li>
> </ul>
> </body>
> </section>
>@@ -749,6 +750,31 @@
> 
> </body>
>         </section>
>+  <section>
>+  <title>Metalogd doesn't log in real time!</title>
>+  <body>
>+  
>+<p>
>+Metalog flushes output to the disk in blocks, so messages aren't immediately 
>+recorded into the system logs.  If you are trying to debug a daemon, this 
>+performance-enhancing behavior is less than helpful.  When your Gentoo Linux 
>+system is up and running, you can send metalog a USR1 signal to temporarily 
>+turn off this message buffering (meaning that <c>tail -f 
>+<path>/var/log/everything/current</path></c> will now work in real time, as 
>+expected) and a USR2 signal to turn buffering back on again. If you want to 
>+disable buffering permanently, you can change METALOG_OPTS="-B" to 
>+METALOG_OPTS="-B -s" in <path>/etc/conf.d/metalog</path>. 
>+</p>
>+
>+<pre caption="Turning metalog buffering on/off">
>+<codenote>To turn the buffering off:</codenote>
>+# <i>killall -USR1 metalog</i>
>+<codenote>To turn the buffering back on:</codenote>
>+# <i>killall -USR2 metalog</i>
>+</pre>
>+
>+  </body>
>+  </section>
> </chapter>
> 
> <chapter>

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