We are running an Oracle 8i (8.1.6.) server on NT 30-250 concurrent users
day and night since two years. It is a dedicated Compaq Proliant server,
never had any problems. Since two years the databse is running without a
single reboot.
Tamas Szecsy
-----Original Message-----
Sent: Tuesday, June 26, 2001 7:30 AM
To: Multiple recipients of list ORACLE-L
Hello Lisa...
I have been handling Oracle on NT last 6 months - and I much prefer UNIX.
Here are some things I learnt the hard way...
>> - can you run multiple instances of Oracle on one NT machine
yes u can. Another lister has replied to u about this - how one uses
"oradim80" to create "instances"/SID's
Note that the default SID can be set in the registry - so that u dont have
to do "set ORACLE_SID=XXXX" everytime
Note that there is no "oraenv" in NT
For every SID there will be 2 services in NT - one called OracleServiceURSID
and another OracleStartURSID. If u keep the latter as "start automatically"
- ur db will come up auto when NT boots up. The former is always required. U
can alter the settings by recreating the instance using oradim
>> - if so, what do I need to look out for (ie. what things are
differentthat a Unix installation)
>> - are any of the processes, etc. drastically different - ie.
security,networking, logging
Dont foreget to create the oradba group. Also Oracle runs as a single
process - there are no different shadow processes. So everything is clumped
in one. The TaskManager might show u how many threads are running in one
process (it does not break up for each app on the machine - so if only the
Oracle server is running - the figure u see should correspond to the number
of Oracle related processes)
Further note that Oracle runs as user "system" - thats an internal hidden
system mode in NT. So there might be occassions when u change permissions on
some orcale related directory and then find that oracle cant access the
files - thats cause u removed "systems" access. Just give required
permission to "system" on those files/directory
>> - what type of system requirements (ie. memory, CPU) are needed on NT
Well that depends on ur requirements. Try to configure ur NT box so that its
"dedicated" to the job of being a database server. U can find some notes on
metalink on this. Ensure that ur NT box does not double as a PDC (primary
domain controller).
Finally reboot machine as often as u can - I have found memory being
allocated and not being released. Keep LOTS of memory - I have seen the NT
box freezing and refusing connections when it no longer had memory to create
a shadown process. (only soln - crash boot the machine)
Further dont use "copy" command to do ur hotbackups - use the "ocopy"
command instead.
Thats all I can think of now..
regards,
~aslam
(PS: I had enough of NT - migrating to Solaris in a months time)
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Author: Szecsy Tamas
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