一早就收到兄弟伙发的QQ信息，关于aix中oracle内存计算的内容
The RSS number is equal to the sum of the number of working-segment pages in memory times 4 and
the code-segment pages in memory times 4.
The TRS number is equal to just the code-segment pages in memory times 4.
Please note that an AIX memory page is 4096 bytes, which is why the number of memory pages must be multiplied by 4 to get the value for
RSS and TRS (which are each reported in kilobytes). For example, if the actual memory used by the code-segment was 2 pages
( 2 pages * 4096 byte page size = 8192 bytes), then the TRS value would be reported as 8 ( 2 {number of pages} * 4 = 8 {kilobytes} ).
Since RSS includes both working-segment and code-segment pages, if we subtract TRS, which is just the code-segment pages, from RSS, we are
left with only the working-segment pages, or private memory. In the example above, the oracle pmon background process is using...
13904 (RSS) - 13512 (TRS) = 392
392 * 1024 = 401408 bytes
The correct amount of memory used by the pmon background process is 392k (401408 bytes), not 34 MB as reported by the "ps -lf" command.
The value of TRS will be approximately the same for all oracle background processes, since all of these processes are just different
invocations of the same $ORACLE_HOME/bin/oracle executable.
来自于AIX: Determining Oracle Memory Usage On AIX [ID 123754.1]
根据以上内容自己写了一条命令来查看
ps vx|grep ora|grep -v grep|awk '{sum+=($7-$10)};end{print sum/1024 "mb"}'
得到只是oracle消耗的私有内存的总量，不包含SGA等
查看每个oracle进程占用的私有内存：
ps vx|grep ora|awk '{print $1,($7-$10)/1024}'|sort -n -k2
