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тАО11-30-2001 09:45 AM
тАО11-30-2001 09:45 AM
Oracle 8.1.6 and HP-UX 11.0 32 bits
I installed Oracle 8.1.6 Enterprise Edition on a K100 and a K200 both running hp-ux 11.0.
My problem is that applications running against the instances on the K100 runs about 10 times faster than on the K200 which has double the CPUs (2 vs 1) and double the memory (512M vs 256M). Both have the same patches installed. The K200 had Oracle 7.3.4 installed which was running fine. I've traced everything I could think of without any luck. I know this is not much to go with but any hint on how seemingly identical machines would react so differently with Oracle 8.1.6.
Thank you
Richard.
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тАО11-30-2001 09:52 AM
тАО11-30-2001 09:52 AM
Re: Oracle 8.1.6 and HP-UX 11.0 32 bits
512MB is very small for an Oracle server but I think your problem is that you used one of those stupid Tuned Parameter Sets that sets timeslice to 1 rather than 10. That will kill you every time. Also, make sure that your max_dbc_pct is not set to the default 50%.
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тАО11-30-2001 10:15 AM
тАО11-30-2001 10:15 AM
Re: Oracle 8.1.6 and HP-UX 11.0 32 bits
What I did was to verify that my tnsnames.ora file has an alternate entry like this...
[name]=
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS=
(PROTOCOL=IPC)
(KEY=name)
)
(ADDRESS =
(COMMUNITY = nnnnnnnnn)
(PROTOCOL = TCP)
(HOST = nnn.nnn.nnn.nnn)
(PORT = nnnnn)
)
)
(CONNECT_DATA =
(SID = name)
)
)
The IPC entry is required for local connections. We recently modified our config and our Oracle applications run 50% faster!
There is a "bigbrother" script in lsof that you can run to see real time network connections. Grab this script, and make a connection to your database locally. You can see exactly which protocol you are using.
Hope this helps.
Tony
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тАО11-30-2001 11:43 AM
тАО11-30-2001 11:43 AM
Re: Oracle 8.1.6 and HP-UX 11.0 32 bits
Suggest you look into the kernel parameters on the two servers and see if you can match them.
Hope this helps.
Regds
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тАО12-03-2001 08:16 AM
тАО12-03-2001 08:16 AM
Re: Oracle 8.1.6 and HP-UX 11.0 32 bits
A. Clay : I know 512M is very small but the system on which the database is faster is on a K100 with 256M. As for the timeslice it is set at 10. dbc_max_pct is set at 5 on both machines.
Anthony : I use both TCP and IPC like you suggest.
Sanjay : I had done that but did it again just in case. Both are identical except for some of them.
They are :
K200 K100
eqmemsize 15 30
ksi_alloc_max 4256 2208
maxswapchunks 384 256
nclist 1124 612
ncsize 1788 1500
nfile 1371 910
nflocks 350 400
ninode 764 476
nkthread 947 499
nproc 532 276
shmseg 60 120
Here is some new info on my problem.
I traced the application on both databases. I get an elapsed time of 30 seconds for all the sql statements executed on my K200 database and 4 seconds for the same statements on my K100 database.....
Hope to get more feedback...thank you.
Richard.
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тАО12-03-2001 01:34 PM
тАО12-03-2001 01:34 PM
Re: Oracle 8.1.6 and HP-UX 11.0 32 bits
Ignore this comment if you have already verified.
Tony