Hi There,
I set up my app to run over night and see what happened to its RAM
and noticed something strange when I came in this morning.
All night there was 0 active sessions ( expected ) but the RAM would
fluctuate between 47 MEG and 50 MEG over a period of a couple of
minutes. I then went to the page, thus creating a new session and the
RAM used dropped by 6 MEG. Another couple of sessions and it dropped
a bit further, with finally after 7 session it was down by 10 MEG.
So before i go any further with my testing and questions for you guys
I thought I should get my code double checked in regards to how Im
reading this RAM
So heres a grab of the output this moring just before and after I
made my sessions
08:32:16,257 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Total
Mem : 63.0 MG
08:32:16,257 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Free
Mem : 14.0 MG
08:32:16,257 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Used :
49.0 MG
08:32:16,257 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Active
Sessions : 0
08:32:31,257 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Total
Mem : 63.0 MG
08:32:31,257 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Free
Mem : 14.0 MG
08:32:31,257 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Used :
49.0 MG
08:32:31,257 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Active
Sessions : 0
08:32:42,901 OFF [WorkerThread3] (Log.NSLogOut:1546 appendln) -
Session Created : 9KSkQ9FaSsLnfpoyzVpWug
08:32:46,256 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Total
Mem : 63.0 MG
08:32:46,257 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Free
Mem : 20.0 MG
08:32:46,257 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Used :
43.0 MG
08:32:46,257 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Active
Sessions : 1
08:33:00,405 OFF [WorkerThread3] (Log.NSLogOut:1546 appendln) -
Session Created : jxj7Lo4ui5vGB836bESL5w
08:33:01,256 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Total
Mem : 63.0 MG
08:33:01,257 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Free
Mem : 22.0 MG
08:33:01,257 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Used :
41.0 MG
08:33:01,257 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Active
Sessions : 2
08:33:04,739 OFF [WorkerThread3] (Log.NSLogOut:1546 appendln) -
Session Created : 1xt5mbejacNB80hFeXzaog
08:33:10,279 OFF [WorkerThread3] (Log.NSLogOut:1546 appendln) -
Session Created : zOPs95bCrNNtFpKqEBpfKM
08:33:14,493 OFF [WorkerThread3] (Log.NSLogOut:1546 appendln) -
Session Created : COs82ecQ3hiUZbxiwCnfOg
08:33:16,256 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Total
Mem : 63.0 MG
08:33:16,256 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Free
Mem : 25.0 MG
08:33:16,256 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Used :
38.0 MG
08:33:16,257 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Active
Sessions : 5
08:33:16,863 OFF [WorkerThread3] (Log.NSLogOut:1546 appendln) -
Session Created : ZyG7CBSnsBd8diFi3l5Vf0
08:33:29,397 OFF [WorkerThread3] (Log.NSLogOut:1546 appendln) -
Session Created : 7xi2ClgCGHCbDoSSt4bUJw
08:33:31,256 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Total
Mem : 63.0 MG
08:33:31,256 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Free
Mem : 25.0 MG
08:33:31,256 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Used :
38.0 MG
08:33:31,256 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Active
Sessions : 7
08:33:46,256 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Total
Mem : 63.0 MG
08:33:46,256 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Free
Mem : 25.0 MG
08:33:46,256 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Used :
38.0 MG
08:33:46,256 OFF [Timer-1] (Log.NSLogOut:1546 appendln) - Active
Sessions : 7
And heres the code, it set on a timer to run every 15 seconds. Im I
doing this correctly ?
public class MemoryWatch extends TimerTask
{
public RISApplication app;
public MemoryWatch(RISApplication newApp) {
app = newApp;
}
public void run()
{
try
{
Runtime runtime = Runtime.getRuntime();
long totalMem = runtime.totalMemory();
long freeMem = runtime.freeMemory();
double difference = new Double(((totalMem/1024)/1024) - ((freeMem/
1024)/1024)).doubleValue();
NSLog.out.appendln("Total Mem : " + new Double(((totalMem/1024)/
1024)).doubleValue() + " MG");
NSLog.out.appendln("Free Mem : " + new Double(((freeMem/1024)/
1024)).doubleValue() + " MG");
NSLog.out.appendln("Used : " + difference + " MG");
NSLog.out.appendln("Active Sessions : " +
app.activeSessionsCount());
}
catch(Exception e)
{
NSLog.out.appendln("Error occured during the Memory
Watch");
}
}
}
Owen McKerrow
WebMaster, emlab
Ph : +61 02 4221 5517
http://emlab.uow.edu.au
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - -
'The test of a first-rate intelligence is the ability to hold two
opposed ideas in the mind at the same time and still be able to
function.'
-F.Scott Fitzgerald,
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