Comments on: Identifying shared memory segment users using lsof http://blog.tanelpoder.com/2009/01/22/identifying-shared-memory-segment-users-using-lsof/?utm_source=rss&utm_medium=rss&utm_campaign=identifying-shared-memory-segment-users-using-lsof Oracle, Exadata, Performance, Troubleshooting - Mobile Life and Productivity. Wed, 08 Feb 2012 08:03:50 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: jc nars http://blog.tanelpoder.com/2009/01/22/identifying-shared-memory-segment-users-using-lsof/comment-page-1/#comment-9988 jc nars Fri, 16 Dec 2011 14:39:26 +0000 http://blog.tanelpoder.com/?p=192#comment-9988 Hi Tanel, Thanks much. Following the note "Retrieve deleted files on Unix / Linux using File Descriptors [ID 444749.1]" we did a: head -100 /proc/16927/fd/44 > /tmp/file1 Basically we had wanted to upload to Support the first few lines of the huge file...but after a few mins, the space was back in the filesystem ! I thank you again for taking time to respond to the blog comment. Hi Tanel,
Thanks much. Following the note “Retrieve deleted files on Unix / Linux using File Descriptors [ID 444749.1]” we did a:
head -100 /proc/16927/fd/44 > /tmp/file1

Basically we had wanted to upload to Support the first few lines of the huge file…but after a few mins, the space was back in the filesystem !

I thank you again for taking time to respond to the blog comment.

]]> By: Tanel Poder http://blog.tanelpoder.com/2009/01/22/identifying-shared-memory-segment-users-using-lsof/comment-page-1/#comment-9968 Tanel Poder Fri, 16 Dec 2011 08:20:48 +0000 http://blog.tanelpoder.com/?p=192#comment-9968 <a href="#comment-9958" rel="nofollow">@jc nars</a> But yes, the next time I'd just truncate the file with "> filename.trc" ... or make sure such traces aren't dumped at all... @jc nars

But yes, the next time I’d just truncate the file with “> filename.trc” … or make sure such traces aren’t dumped at all…

]]> By: Tanel Poder http://blog.tanelpoder.com/2009/01/22/identifying-shared-memory-segment-users-using-lsof/comment-page-1/#comment-9967 Tanel Poder Fri, 16 Dec 2011 08:19:18 +0000 http://blog.tanelpoder.com/?p=192#comment-9967 <a href="#comment-9958" rel="nofollow">@jc nars</a> What you can also do is to identify SMON's spid (16927) and then: 1) ORADEBUG SETOSPID 16927 2) ORADEBUG CLOSE_TRACE As this is SMON, I'm not too comfortable sending oradebug commands to it (wouldn't want to crash it by any chance! :) but you can use this as your last option instead of restarting the instance (But do this at your own risk! :) @jc nars

What you can also do is to identify SMON’s spid (16927) and then:

1) ORADEBUG SETOSPID 16927
2) ORADEBUG CLOSE_TRACE

As this is SMON, I’m not too comfortable sending oradebug commands to it (wouldn’t want to crash it by any chance! :) but you can use this as your last option instead of restarting the instance (But do this at your own risk! :)

]]> By: jc nars http://blog.tanelpoder.com/2009/01/22/identifying-shared-memory-segment-users-using-lsof/comment-page-1/#comment-9958 jc nars Fri, 16 Dec 2011 05:11:26 +0000 http://blog.tanelpoder.com/?p=192#comment-9958 Hi Tanel, How do u do...one of the background processes SMON ran up a HUUUUUUUUUUGE trace file that just left 5% free space. And, the rookie dba rm-ed the file...instead of doing something like echo ''> bigtracefile. This is in the first node of Exadata X2. Oracle Support says no other option other than to kill SMON to free up the filesystem ! I will be hanged if I request a bounce...as we just moved from V1 to X2 2 months back. Any 'unsupported' tricks you guys at Enkitec know of?!! Thanks P.S.: lsof -p 16927 | egrep '^COMMAND|trc|trm' COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME oracle 16927 oracle 44w REG 253,2 48599035904 12880302 /u01/app/oracle/diag/rdbms/edaprd/edaprd1/trace/edaprd1_smon_16927.trc (deleted) oracle 16927 oracle 45w REG 253,2 3661829175 12880303 /u01/app/oracle/diag/rdbms/edaprd/edaprd1/trace/edaprd1_smon_16927.trm (deleted) Hi Tanel,
How do u do…one of the background processes SMON ran up a HUUUUUUUUUUGE trace file that just left 5% free space. And, the rookie dba rm-ed the file…instead of doing something like echo ”> bigtracefile.

This is in the first node of Exadata X2.
Oracle Support says no other option other than to kill SMON to free up the filesystem !
I will be hanged if I request a bounce…as we just moved from V1 to X2 2 months back.

Any ‘unsupported’ tricks you guys at Enkitec know of?!!
Thanks

P.S.:
lsof -p 16927 | egrep ‘^COMMAND|trc|trm’
COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME
oracle 16927 oracle 44w REG 253,2 48599035904 12880302 /u01/app/oracle/diag/rdbms/edaprd/edaprd1/trace/edaprd1_smon_16927.trc (deleted)
oracle 16927 oracle 45w REG 253,2 3661829175 12880303 /u01/app/oracle/diag/rdbms/edaprd/edaprd1/trace/edaprd1_smon_16927.trm (deleted)

]]> By: Nayyar Ahmad http://blog.tanelpoder.com/2009/01/22/identifying-shared-memory-segment-users-using-lsof/comment-page-1/#comment-886 Nayyar Ahmad Fri, 30 Jan 2009 09:45:39 +0000 http://blog.tanelpoder.com/?p=192#comment-886 Hi, i am using Solaris 9, when i ran ipcs -ma command there were several output line, though Solaris does't mention STATUS column, how can i investigate in this situation ? Hi,

i am using Solaris 9, when i ran ipcs -ma command there were several output line, though Solaris does’t mention STATUS column, how can i investigate in this situation ?

]]> By: Tanel Poder http://blog.tanelpoder.com/2009/01/22/identifying-shared-memory-segment-users-using-lsof/comment-page-1/#comment-851 Tanel Poder Fri, 23 Jan 2009 11:50:19 +0000 http://blog.tanelpoder.com/?p=192#comment-851 Thanks Chen :) Python was reading some interesting stuff out of there ;) But I've had cases where an Oracle server process fails to die during shutdown and keeps being attached to SGA... Thanks Chen :)

Python was reading some interesting stuff out of there ;)

But I’ve had cases where an Oracle server process fails to die during shutdown and keeps being attached to SGA…

]]> By: Chen Shapira http://blog.tanelpoder.com/2009/01/22/identifying-shared-memory-segment-users-using-lsof/comment-page-1/#comment-849 Chen Shapira Fri, 23 Jan 2009 02:11:21 +0000 http://blog.tanelpoder.com/?p=192#comment-849 Very cool demo. What was python doing in your SGA? Very cool demo. What was python doing in your SGA?

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