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тАО12-02-2003 06:03 AM
тАО12-02-2003 06:03 AM
If, I remove this driver will performance be improved or degraded?
What will be the benefit of removing the /dev/async driver?
I have a real concern about the benefits of this request.
Solved! Go to Solution.
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тАО12-02-2003 06:16 AM
тАО12-02-2003 06:16 AM
Re: /dev/async
# ls -al /dev/async
On system performance, async drivers does have the impacts especially on I/O process. I would defenitely consider checking what's the real reason behind your issue, before removing the driver from the system.
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тАО12-02-2003 06:22 AM
тАО12-02-2003 06:22 AM
Re: /dev/async
pseudo driver asyncdsk minor 0x000000 /dev/async
Also, dba MLOCK does exist in /etc/privgroup
Thanks for your advice
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тАО12-02-2003 06:28 AM
тАО12-02-2003 06:28 AM
Re: /dev/async
# mknod /dev/async c 101 0x00000?
The last digit can be:
0x000000 default
0x000001 enable immediate reporting
0x000002 flush the CPU cache after reads
0x000004 allow disks to timeout
0x000005 is a combination of 1 and 4
0x000007 is a combination of 1, 2 and 4
(Refer TKB #UPERFKBAN00000726)
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тАО12-02-2003 06:31 AM
тАО12-02-2003 06:31 AM
Solution- Mark as New
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тАО12-02-2003 08:11 AM
тАО12-02-2003 08:11 AM
Re: /dev/async
I ran the getpriv dba on the test server and the response was:
# getprivgrp dba # Test server
dba: MLOCK
# getprivgrp dba # Prod server
dba:
It turns out that the /etc/privgroup had a typo in it.
cat /etc/privgroup
dba MBLOCK
Bingo! Problem found.
Thanks for your help.
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тАО12-02-2003 08:15 AM
тАО12-02-2003 08:15 AM
Re: /dev/async
Get your DBA to describe the problem NOT what he thinks the solution will be.