What is vhand and why such high Disk IO

[Rick Dallow]

On a 16cpu V-class which experienced 100% disk utilization, Glance - Process List indicated
vhand Disk IO of 445/0.2

I'll have to confirm with the remote site but I believe this box has 16-32GB memory.

Any suggestions?

[harry d brown jr]

vhand is your paging process. Check your memory utilization, you could be going to virtual swap.

[Santosh Nair_1]

Sounds like you're running into a memory issue...check your swap utilization. Also, this URL might provide some addtional reading:

http://www.dutchworks.nl/htbin/hpsysadmin?h=3&dn=50812&q=vxfsd&fh

-Santosh

[James R. Ferguson]

Rick:

If you would really like to delve into memory management (or perhaps just understand a bit more about 'vhand'), have a look at the "HP-UX Memory Management White Paper (version 1.4)":

http://docs.hp.com/cgi-bin/otsearch/getfile?id=/hpux/onlinedocs/os/11i/mem_mgt.html&searchterms=vhand&queryid=20011009-142553

If you wish, the section specifically on 'vhand' is here:

http://docs.hp.com//hpux/onlinedocs/os/11i/mem_mgt.html#vhand,%20the%20pageout%20daemon

Regards!

...JRF...