topic Swapfile or Pagefile? in Operating System - OpenVMS

Swapfile or Pagefile?

Jorge Cocomess — Sat, 08 Apr 2006 00:27:30 GMT

Greetings,

I would like to know how you can install additional swapfiles spread across numerous SANs disks. This is what my sysgen displayed after I executed these commands, SWAPFILCNT & PAGFILCNT;

Is this normal if I don't see positive value?

SYSGEN> SHO SWPFILCNT
Parameter Name Current Default Min. Max. Unit Dynamic
-------------- ------- ------- ------- ------- ---- -------
SWPFILCNT 0 0 0 0 Obsolete
SYSGEN> SHO PAGFILCNT
Parameter Name Current Default Min. Max. Unit Dynamic
-------------- ------- ------- ------- ------- ---- -------
PAGFILCNT 0 0 0 0 Obsolete
SYSGEN>

Please help!

Thank you in advance.

J

Re: Swapfile or Pagefile?

Sameer_Nirmal — Sat, 08 Apr 2006 01:41:50 GMT

Hi Jorge,

SWPFILCNT & PAGFILCNT system parameters are not used in OpenVMS Alpha and IA64. Hence they are being shown obsolete.

However, OpenVMS Alpha and IA64 supports maximum of 254 page and or swap files on a system.

Refer following document (chapter 2) for procedure to install additional swap, page files. Using AUTOGEN is recommended method.

http://h71000.www7.hp.com/doc/82FINAL/aa-pv5nj-tk/aa-pv5nj-tk.PDF?jumpid=reg_R1002_USEN

Re: Swapfile or Pagefile?

Volker Halle — Sat, 08 Apr 2006 02:26:48 GMT

Jorge,

as already has been said, PAGFILCNT and SWPFILCNT have become obsolete with OpenVMS Alpha V7.3 or higher (and OpenVMS I64), with an internal limit of 254 for the total sum of installed page and swap files.

Page and swap files can be created with SYSGEN> CREATE dev:filename.SYS/SIZE=xxx or by using AUTOGEN, see chapter 16.16 in:

http://h71000.www7.hp.com/doc/73final/6017/6017pro_073.html#create_page_swap

You need to install secondary page and swap files during startup, preferred method is to use SYS$MANAGER:SYPAGSWPFILES.COM - you need to mount the disk before installing the files (see chapter 5.2.3 in above document)

Volker.