Thursday, September 16, 2010

How to savecore in solaris

usually if the system is experiencing panic, then the investigation which is conducted from the coredump, but sometimes not coredump file is created .. follows the steps to be able to make the coredump file

root # tail -f /var/adm/messages | grep savecore
Sep 14 11:08:58 myserver savecore: not enough space in /var/crash/myserver (2094 MB avail, 3634 MB needed)

hohoho...size in /var not enough for save this coredump..

root # df -h /tmp
swap 47G 255M 46G 1% /tmp
root # mkdir /tmp/corecore
root # cd /tmp/corecore
root # savecore -Ld .
dumping to /dev/dsk/c0t9d0s0, offset 65536, content: kernel
100% done: 282920 pages dumped, compression ratio 4.86, dump succeeded
System dump time: Tue Sep 14 13:38:16 2010
Constructing namelist ./unix.0
Constructing corefile ./vmcore.0
100% done: 282920 of 282920 pages saved
root #

savecore with option :
-L Save a crash dump of the live
running Solaris system, without actually rebooting
or altering the system in any way.
-d Disregard dump header valid flag. Force
savecore to attempt to save a crash dump
even if the header information stored on the
dump device indicates the dump has already
been saved.

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