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Swap issue

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Operating Systems Solaris Swap issue
# 1  
Old 01-27-2010
Swap issue
hi all,

yesterday, on one of the SunFire4800 system, there was a strange issue seen.

Code:
# df -h
Filesystem             size   used  avail capacity  Mounted on
/dev/md/dsk/d0     4.7G   554M   4.1G    12%    /
/proc                   0K     0K     0K     0%    /proc
mnttab                 0K     0K     0K     0%    /etc/mnttab
fd                        0K     0K     0K     0%    /dev/fd
/dev/md/dsk/d10    20G   2.5G    17G    13%    /var
swap                   100M   104K   94M     79%    /var/run
swap                   167M   229M   100M    3%    /tmp
#


swap -l was saying


Code:
#swap  -l 
swapfile             dev  swaplo blocks   free
/dev/md/dsk/d5      85,5      16 10033520 10033520


in dmesg, below given logs were appearing:


Code:
Jan 26 12:42:07 marx tmpfs: [ID 518458 kern.warning] WARNING: /tmp: File system full, swap space limit exceeded
Jan 26 12:42:07 marx RemLog[2124]: [ID 370514 user.error] marxw_app error handler: pid(2124) log_id(0AE73C01.003C) Problem with temporary log file <No space lef
t on device>
Jan 26 12:42:47 marx tmpfs: [ID 518458 kern.warning] WARNING: /tmp: File system full, swap space limit exceeded
Jan 26 12:42:47 marx RemLog[2124]: [ID 370514 user.error] marxw_app error handler: pid(2124) log_id(0AE73C01.003D) Problem with temporary log file <No space lef
t on device>
Jan 26 12:42:47 marx tmpfs: [ID 518458 kern.warning] WARNING: /tmp: File system full, swap space limit exceeded
Jan 26 12:42:47 marx RemLog[2124]: [ID 370514 user.error] marxw_app error handler: pid(2124) log_id(0AE73C01.003D) Problem with temporary log file <No space lef
t on device>
Jan 26 12:43:03 marx tmpfs: [ID 518458 kern.warning] WARNING: /tmp: File system full, swap space limit exceeded
Jan 26 12:43:03 marx RemLog[2124]: [ID 370514 user.error] marxw_app error handler: pid(2124) log_id(0AE73C01.003E) Problem with temporary log file <No space lef
t on device>
Jan 26 12:43:04 marx tmpfs: [ID 518458 kern.warning] WARNING: /tmp: File system full, swap space limit exceeded
Jan 26 12:43:04 marx RemLog[2124]: [ID 370514 user.error] marxw_app error handler: pid(2124) log_id(0AE73C01.003E) Problem with temporary log file <No space lef


what I had to do is to reset the OS using 'init 6' and then the system is back in normal state.

Now the question:

in normal state, the system's 'df -h' show swap space around 10G like below:


Code:
# df -h
Filesystem             size   used  avail capacity  Mounted on
/dev/md/dsk/d0         4.7G   344M   4.3G     8%    /
/dev/md/dsk/d15         13G   3.2G    10G    25%    /usr
/proc                    0K     0K     0K     0%    /proc
mnttab                   0K     0K     0K     0%    /etc/mnttab
fd                       0K     0K     0K     0%    /dev/fd
/dev/md/dsk/d10         20G   4.7G    15G    24%    /var
swap                   9.7G   104K   9.7G     1%    /var/run
swap                   9.7G   7.7M   9.7G     1%    /tmp



in prstat nothing was show abnormal but no new process was forkable, no process could be started.

any idea where this swap had gone..
Last edited by pludi; 01-27-2010 at 09:44 AM.. Reason: code tags, please...
# 2  
Old 01-27-2010
During the point of time, some application process might be using it heavily.
but one strange thing.. how come the 2 outputs are so different? are they from different servers? How come the /usr is not mounted in first output? was your system in single user mode or anything?? confusing..
# 3  
Old 01-30-2010
Lightbulb
Hi busyboy,

Since this is a SunFire4800, you can start by checking out the SC (system controller) logs.

Is this platform standard single domain or dual domain, setup?

Have you made any changes to your system, added hardware, or changed system settings?

Any new applications installed?

Is your system currently running the latest OS kernel Patch & is the platform firmware up to the latest reccommended OBP level.(open boot prom)

I hope this is of help or a useful pointer.


Jnike
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