RE: Failure to Release Diskspace

I believe a dismount/mount will clear it, unfortunately the db will have to be 
offline.

From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On 
Behalf Of Fowler, Kenneth R
Sent: Wednesday, September 01, 2010 1:49 PM
To: andrew.kerber@xxxxxxxxx; ian@xxxxxxxxxxxxxxxxx
Cc: Oracle-L Freelists; Fowler, Kenneth R
Subject: RE: Failure to Release Diskspace

Also a long time since I used VMS.  I do remember that one issue I sometimes 
faced is that the free block count on a disk device would sometimes not match 
up with reality (might be the issue you face).  To correct this we would use 
copy/allocate command... something like...


$ copy/allocate=nnnnnn junk.dat junk2.dat


where junk.dat was a small file and "nnnnnn" was some large number to force the 
command to fail.  This had the side effect of resetting the free block count 
for the device.


Regards,
Ken.

Business Applications, Solutions and Service Delivery (BASSD)
Database Services, Howard Street, New London, CT
Office: (860) 732-1422 | Mobile: (860) 389-3534


________________________________
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On 
Behalf Of Andrew Kerber
Sent: Wednesday, September 01, 2010 1:41 PM
To: ian@xxxxxxxxxxxxxxxxx
Cc: Oracle-L Freelists
Subject: Re: Failure to Release Diskspace
Dont you have to kill the process accessing the file before it can be resized?  
show dev/files and kill the processes that is accessing the file?  Its been a 
few years since I used VMS myself...
On Wed, Sep 1, 2010 at 12:31 PM, MacGregor, Ian A. 
<ian@xxxxxxxxxxxxxxxxx<mailto:ian@xxxxxxxxxxxxxxxxx>> wrote:
I have not touched a VMS system for 20 odd years.   One of the things I did was 
to shrink the size of the  undo tablespace from 2770 MB to 1024 MB.  When I 
issue the VMS command

show device/full  <device_name>

the number of free blocks is no different than before.  What  needs to be done 
to get the space released.


Ian MacGregor
SLAC National Accelerator Center

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Andrew W. Kerber

'If at first you dont succeed, dont take up skydiving.'

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