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Memory management in UNIX
Oracle Tips by Burleson Consulting
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Memory management in UNIX
Most operating systems today possess what is commonly called
virtual memory. In a virtual memory configuration it is
possible to extend the existing RAM memory with the use of
special swap disk areas.
Memory management in UNIX is critical to the performance of
any Oracle database. As we may know from out Oracle Remote
DBA 101 training, the RAM regions of Oracle are designed to
improve the speed of data access by several orders of
magnitude.
In other words, RAM is more than 10,000 times faster to
access than going to a disk device for the data. Hence, we
are very concerned that our RAM memory always stays within
the actual RAM cache and is not swapped out to the swap dis.
Let’s take a close look at how this works. |
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