On di freemem

Question

Hi all !
ecc 5.0 , oracle 9i, solaris 10.
this link ( http://s1.ipicture.ru/uploads/20120130/T6DqzpVv.png )  to free physical memory in mb statistics.
From 14 january to 29 jan.  on CI and DI servers.
used the average value memory per day
The graph shows 15 jan i restart DI and memory freed . But daily free memory decreases and does not return.
DI application server takes memory and dont returns into free memory. What do you think it's a memory leak?
I dont understand why DI takes memory and dont returns into free memory.
On CI server 15, 22, 28 jan. You can see how during the backup database stopped and freed memory
in work process you can see that CI return  into free memory but DI not (

Answer 1

Hi Andrey,
Once a workprocess allocated the portion of memory, it will not release it to the OS as a default behaviour. But, there are two options to reclaim the allocated memory, to the OS.
1) Restart the work processes: You can configure the profile parameter "rdisp/wp_auto_restart", to restart the workprocess after a time period, automatically. By doing so, because of the work process is restarted respectfully, allocated memory will be reclaimed to the OS. You can set the value as second, minute or hour.
2) Configuring the threshold value: You can configure a threshold value to reclaim the allocated memory to the OS. Please find the parameters, below;
em/blocksize_KB=Block size
es/blockdisclaimsize_KB=Size of the upper part of an EM block that is also released for the operating system
es/disclaim_threshold_MB=Threshold value to release the memory to the OS
es/disclaim_coasting_time_free=How long the system should wait after the threshold value specified by es/disclaim_threshold_MB is exceeded when a block is released before releasing the block for the OS.
es/disclaim_coasting_time_alloc= How long after the threshold value specified by es/disclaim_threshold_MB is exceeded when allocating a block that has just been paged out in the swap space this block is to be released for the OS.
>> On CI server 15, 22, 28 jan. You can see how during the backup database stopped and freed memory
in work process you can see that CI return into free memory but DI not
Regarding your second question, are you sure the DI is restarted, as well after the offline backup? This is because it seems that DI is not restarted and wait for at the "reconnect" state.
Best regards,
Orkun Gedik