vhand

[Sandip Ghosh]

What does the vhand process do?

Thanks in advance
Sandip

[harry d brown jr · Accepted solution]

paging

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

live free or die
harry

[Ian Dennison_1]

"The vhand process is responsible for Management of Memory Availability" (taken from the HP-UX Memory Management whitepaper).

In brief, it is responsible for freeing up memory by paging it out.

If you would to learn more, look for the Whitepaper on the forums here.

Cheers, Ian Dennison

[Helen French]

Hi,

Check this out:

http://www.docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/5965-4641/5965-4641_top.html&con=/hpux/onlinedocs/5965-4641/00/00/11-con.html&toc=/hpux/onlinedocs/5965-4641/00/00/11-toc.html&searchterms=vhand&queryid=20020213-072921

HTH,
Shiju

[Sanjay_6]

Hi Sandip,

"vhand" is the swapper process that handles the normal paging mechanism. It is the "swapper", the process that swap pages to and from between swap and memory.

hope this helps.

Regds

[Patrick Wallek]

If you are seeing vhand useing a lot of CPU time, then you are not going to get much done on your machine. vhand is the process that controls swapping of pages from memory to the swap area on disk. If it is using lots of CPU then you are doing lots of swapping and it is time for more RAM for this machine.

[James George_1]

vhand daemon handles the paging requirements and memory clearence. It decides when to page and takes care of the memory by clearing its references. It depends on couple of factors ..sorry don't remeber anything now.

Rgds / James

[harry d brown jr]

Sandip,

If it's consuming a lot of cpu, look at this:

http://us-support3.external.hp.com/cki/bin/doc.pl/screen=ckiDisplayDocument?docId=200000043976223
live free or die
harry

[Sanjay_6]

Hi Sandip,

If you see "vhand" consuming a lot of system time, you should reduce the value of the kernel parameters, dbc_min_pct and dbc_max_pct Your dbc_max_pct was probably set at the default value of 50%, so it is consuming half of your RAM over time, thus slowing performance and using memory.

Hope this helps.

Regds

[Marcin Wicinski]

Hi,
vhand process is responsible for performing paging tasks.

[Helen French]

Hi,

Also, Check this out:

http://www.docs.hp.com//hpux/onlinedocs/os/11i/mem_mgt.html#pregion elements used by vhand

HTH,
Shiju

[Sandip Ghosh]

Hi All,

Thanks everybody for your replies.

Sandip