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Size and number of luns for the database (500GB or 1TB)

aitorit0May 28 2018 — edited Jun 18 2018

Hi cracks,

We would like to move our production database to ASM (8,5TB)...

what is more preferable, luns of 1 TB (16) or luns of 500GB (32)?

thanks
This post has been answered by aitorit0 on Jun 5 2018
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843829
Hi,

Sun's JVM runs very well on multi-thread/core/chip systems and provides several mechanisms to scale well in such environments (for example Thread Local Allocation Buffers (TLABs), parallel gargabe collection threads etc.). Java threads are 1:1 mapped to operating system threads. There are lots of options that allow you to configure the JVM wrt number of gc threads and so on, although the defaults should in most cases work well. There is a lot information available at http://java.sun.com/docs/performance/index.html and some (quite outdated) information about threading at http://java.sun.com/docs/hotspot/threads/threads.html.

Nick.
843829
Hi nicolasmichael,
Thanks for the prompt reply,
From your post i understand that JVM's should support threading on multi core and multi CPU systems. However there is still one unknown in my equation.
Does Sun JVM support Native threads on Windows ? and Solaris ?
This is important because if Sun JVM does not support Native Threads then Green threads can only run on one CPU and using a multi core/processor system is a waste.

Also I know that IBM's VM has support for Native threads on Linux.

Thanks.
rishabh2u wrote:
Does Sun JVM support Native threads on Windows ? and Solaris ?
This is important because if Sun JVM does not support Native Threads then Green threads can only run on one CPU and using a multi core/processor system is a waste.
The Sun VM no longer has green threads. Last Sun VM that had those I believe was 1.2.

Green threads only existed on Solaris.
843829
So basically you are saying that Sun VM has ONLY NATIVE THREADS for ALL the operating systems ?
Thanks.
843829
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Locked on Jul 3 2018
Added on May 28 2018
#automatic-storage-management, #performance-availability
18 comments
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