defunct proceses from RMAN backup

[Former Member]

Hi

I have problem as below, need your help

Issues are RMAN backups failing. Autosys auto_remote processes going defunct. These defunct processes use the resources hdisk2 and en2. This cause the system performance to crawl.

Topas was showing hdisk2 at 100% busy. At the same time en2 was showing under a very heavy load. u201Cen2u201D is the backup interface and with no backup running it was still under heavy load.

This leads to a check of defunct processes as listed below:

orarpd 331960 3534890 2 0:00 <defunct>

orarpd 360624 3641546 5 0:00 <defunct>

orarpd 426140 618624 4 0:00 <defunct>

orarpd 438330 467108 4 0:00 <defunct>

orarpd 540878 696564 2 0:00 <defunct>

rpdadm 581696 631010 83 0:00 <defunct>

orarpd 639176 4444346 6 0:00 <defunct>

orarpd 725096 626924 6 0:00 <defunct>

orarpd 807096 4169896 5 0:00 <defunct>

orarpd 1487048 4145364 1 0:00 <defunct>

orarpd 1691776 2953224 6 0:00 <defunct>

orarpd 2211918 610378 13 0:00 <defunct>

orarpd 2601054 753874 5 0:00 <defunct>

orarpd 2883838 675940 14 0:00 <defunct>

akolenk 2949206 3272764 1 19:16:11 pts/0 0:00 grep defunct

orarpd 3109098 3387404 3 0:00 <defunct>

orarpd 3125314 2642144 7 0:00 <defunct>

orarpd 3162148 434250 4 0:00 <defunct>

orarpd 3289100 3403978 3 0:00 <defunct>

orarpd 3608790 2945128 6 0:00 <defunct>

After the server was rebooted two days back and hdisk2 and en2 returned to normal. During a hot backup yesterday morning hdisk2 was averaging 70% and while today it was 100% again.

Please let me know if you have any thoughts on the issue

Al Mamun

[Former Member · Accepted solution]

Two ideas about that:

Check your hardware for possible issues. Maybe contact your hardware vendor.

Check all parts of the hardware involved, for example also SAN switches, if there are any.

Check Unix kernel parameters.

You didn't tell us which kind of Unix. But there should be SAP notes with recommendations.

And look for suspicious entries in Unix log files.

regards