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AIX Frequently Asked Questions and Debugging Tips for CommandCentral Storage (r1.18)
Details:
How do I display process information on an AIX host?
/usr/bin/topas -P

How do I display available and configured swap space on an AIX host?
/usr/sbin/swap -l and /usr/sbin/swap -s:

Example Output:
# uname -a
AIX hal-ibmp610-1 2 5 0007B76A4C00
# /usr/sbin/swap -l
device              maj,min        total       free
/dev/hd6              10,  2       512MB       508MB
#
# /usr/sbin/swap -s
allocated  =    131072 blocks    used  =   770 blocks      free  =    130302 blocks

How do I display system errors on an AIX host?
/usr/bin/errpt -a

How do I determine the amount of paging space on an AIX host?
lsps

Other utilities:
svmon
vmstat

How do I capture and examine core files on an AIX host?
/usr/bin/errpt prints the stack traces written into AIX system logs.

errpt -aJ CORE_DUMP > /tmp/coreInfo.out

errpt can be used to capture the complete system logs too:

errpt -a > /tmp/syslogs.out

/usr/bin/snapcore can be used to collect a core and all the associated files, so that we have chance of getting a better stack on our in-house machines:

snapcore /var/VRTSccs/VRTShal/data/process/ApplicationExplorers/core /opt/VRTSccs/VRTShal/bin/wrap/halrun

Note: the /opt/VRTSccs/VRTShal/bin/halrun is a shell-script wrapper file which invokes the actual binary /opt/VRTSccs/VRTShal/bin/wrap/halrun. You must specify the actual binary, not the wrapper script.

To analyze the snapcore image:
tar extract it on an AIX host,
cd into the "snapcore" directory that the tarfile extraction created, and
run the following dbx command, including parameters (the name of the core will be different, i.e., not core.052808):

root@spcibm8:/nkapling/snapcore> dbx -p /opt=./opt:/usr=./usr opt/VRTShal/bin/wrap/halrun core.052808
Type 'help' for help.
[using memory image in core.052808]
reading symbolic information ...warning: "/usr/lib/libC.a(shrcore.o)" has changed since core creation
warning: "/usr/lib/libC.a(ansicore_32.o)" has changed since core creation
warning:  is newer than ./opt/VRTShal/lib/librmm_xml_t.a

warning: Unable to access address 0x2f2f6d86 from core
pthreaded.c, 6076: PTHDB_CALLBACK (callback failed)

Segmentation fault in strcpy.strcpy [./opt/VRTShal/lib/liboraexp.so] at 0x31deabec
0x31deabec (strcpy+0x8c) 94e50004        stwu   r7,0x4(r5)
(dbx) where
strcpy.strcpy() at 0x31deabec
oraDiscover.strcpyFPcPCc(0x339b7040, 0x339b6840), line 64 in "string.h"
unnamed block in getInstanceStatus(instance_t*)(instance = 0x2d586d78), line 730 in "oraDiscover.cpp"
getInstanceStatus(instance_t*)(instance = 0x2d586d78), line 730 in "oraDiscover.cpp"

/usr/bin/procstack displays the stack backtrace of an executing process.

procstack <PID>

procstack is available in 5.2 and 5.3 machines, but it works only on running processes (i.e., it accepts a PID) and not on cores.


Products Applied:
 CommandCentral Storage 5.0, 5.0 MP1, 5.0 MP1 RP1, 5.0 MP1 RP2, 5.0 MP1 RP3, 5.1
Last Updated: January 23 2009 10:54 PM GMT
Expires on: 12-14-2018
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Subjects:
 AIX
   Information Development: Troubleshooting
CommandCentral Storage
   Admin Tools/Utilities: Cli, Diagnostics

Languages:
 English (US)

Operating Systems:
AIX

5.2, 5.3