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тАО12-18-2001 07:23 AM
тАО12-18-2001 07:23 AM
I'm trying to adjust the SGAs sizes in a multi instances machine enviroment, and calculating the memory requirements for it, but I don't find the 'pagesize' or system page size.
Any one helping me? Is there any other way of doing the estimate?
Solved! Go to Solution.
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тАО12-18-2001 07:26 AM
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тАО12-18-2001 07:26 AM
тАО12-18-2001 07:26 AM
Re: oracle 8i memory requirements with many instances
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тАО12-18-2001 01:01 PM
тАО12-18-2001 01:01 PM
Re: oracle 8i memory requirements with many instances
If you absolutely must use 32bit Oracle, look into memory windows to give each instance a clean, unshared area of memory. In general, large SGA's, when configured with big sort areas and file buffers) make Oracle run very fast.
Bill Hassell, sysadmin
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тАО12-18-2001 02:38 PM
тАО12-18-2001 02:38 PM
Re: oracle 8i memory requirements with many instances
i was going through the posts from the last couple of days, and I am really glad someone asked this question. I have been having problems getting a thrid database up and running. Either though I didn't post the question, I'd like to thank you all for your explanations and what I need to look at.
Thanks
MP
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тАО12-18-2001 05:16 PM
тАО12-18-2001 05:16 PM
Re: oracle 8i memory requirements with many instances
http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x1259039599eed5118ff40090279cd0f9,00.html
In general, high performance for Oracle (and Stbase and Informix...) mean gigabytes (8-12) of RAM. The kernel tuning possible with HP-UX has very little effect when compared to changes in the Oracle SGA config file. If you think in terms of 1000-2000 megs for SGA per instance, you'll be safe. Of course, this means 11.0 or higher for big RAM support.
Bill Hassell, sysadmin
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тАО12-19-2001 12:55 AM
тАО12-19-2001 12:55 AM
Re: oracle 8i memory requirements with many instances
My machine is 64-bit.
And thanks you all for answering so fast and well.
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тАО12-19-2001 07:52 AM
тАО12-19-2001 07:52 AM
Re: oracle 8i memory requirements with many instances
I called sysconf(_SC_PAGE_SIZE) from the command line:
#getconf _SC_PAGE_SIZE
4096