RE: Memory Management on RHEL4

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Seems formatting got screwed up, 
I have total of 8GB RAM, on two servers
Out put from free command, 
On Machine 1

             total       used       free     shared    buffers
cached

Mem:       8104664    8084304      20360          0       7848
64284

-/+ buffers/cache:    8012172      92492

Swap:      2031608    1001964    1029644

On Machine 2 

             total       used       free     shared    buffers
cached

Mem:       8104664    3571624    4533040          0      30568
1016700

-/+ buffers/cache:    2524356    5580308

Swap:      2031608          0    2031608


If I calculate using TOP, 

Machine 1								
PID	USER	%CPU	%MEM	TIME+	COMMAND		Memory *
8000/100	
30394	tomcat	3	22.2	9053:09:00	java		1776	
11497	tomcat	0	14.3	6770:01:00	java		1144	
29523	tomcat	0	4.3	22309:09	java		344	
32390	tomcat	0	2.6	14:58.1	java		208	
31848	tomcat	0	2.1	09:29.2	java		168	
9446	tomcat	0	1.9	23:33.6	java		152	
12880	tomcat	0	1.5	38:18.2	java		120	
21577	tomcat	0	1.2	55:10.5	java		96	
27383	root		0	0.1	00:25.2	snmpd		8	
32238	ntp		0	0.1	00:31.5	ntpd		8	
2597	hpsmh		0	0.1	00:03.7	hpsmhd	8	
5573	root		0	0	00:00.2	sshd		0	
	
4032	
Machine 2								
PID	USER	%CPU	%MEM	TIME+	COMMAND		Memory *
8000/100	
4164	tomcat	11	14.9	29:12.9	java		1192	
4256	tomcat	16	3.7	23:40.8	java		296	
4195	tomcat	5	3.2	06:04.3	java		256	
4320	tomcat	0	2.3	01:35.1	java		184	
4054	tomcat	0	2.1	00:27.3	java		168	
4227	tomcat	5	1.9	00:51.9	java		152	
4291	tomcat	0	1.9	00:58.0	java		152	
4348	tomcat	0	1.9	00:49.0	java		152	
2456	root		0	0.1	00:11.1	snmpd		8	
2765	hpsmh		0	0.1	00:00.0	hpsmhd	8	
2739	root		0	0.1	00:00.3	hpsmhd	8	
2531	ntp		0	0.1	00:00.0	ntpd		8	
3434	root		0	0.1	00:01.8	hald		8	
3910	root		0	0	00:00.1	sshd		0	
14055	root		0	0	00:00.1	sshd		0	
	
2592	

When I run this command on machine1 and machine2 

ps -eo pid,size,vsize,cmd --sort -size | head -n 25 | awk '{print $1
"\t" $2 "\t" $3 "\t" $4}' 

machine1					
PID	SZ	VSZ	CMD		
30394	2950768	3083044	/usr/java/jdk1.5.0_12/bin/java		
11497	1342440	1568004	java		
32390	600596	727888	/usr/java/jdk1.5.0_12/bin/java		
29523	561132	790028	/usr/java/jdk1.5.0_12/bin/java		
31848	529884	664404	/usr/java/jdk1.5.0_12/bin/java		
12880	525296	653620	/usr/java/jdk1.5.0_12/bin/java		
9446	510412	641028	/usr/java/jdk1.5.0_12/bin/java		
21577	508136	636456	/usr/java/jdk1.5.0_12/bin/java		
2597	293032	387356	/opt/hp/hpsmh/sbin/hpsmhd		
2943	113012	114728	hpasmd		
3015	61672	63280	cmahealthd		
3010	20696	22304	cmastdeqd		
27383	16752	101584	/usr/sbin/snmpd		
2961	10892	12620	cmapeerd		
3112	10628	13080	cmafcad		
2970	10592	12492	cmahostd		
11495	10476	15552	/usr/local/wrapper/bin/wrapper		
3243	10448	19892	dbus-daemon-1		
3110	10436	11960	cmaided		
3263	3944	17824	hald		
2573	3132	96388	/opt/hp/hpsmh/sbin/hpsmhd		
2490	1592	34996	sendmail:		
2498	1448	27788	sendmail:		
2584	940	57080	crond		
	8108356	9773396			

Machine			
PID	SZ	VSZ	CMD
4164	2120244	2251492	/usr/java/jdk1.5.0_12/bin/java
4054	1281480	1507044	java
4256	501332	730232	/usr/java/jdk1.5.0_12/bin/java
4320	490952	724420	/usr/java/jdk1.5.0_12/bin/java
4195	488836	616132	/usr/java/jdk1.5.0_12/bin/java
4227	476356	604680	/usr/java/jdk1.5.0_12/bin/java
4291	467356	597976	/usr/java/jdk1.5.0_12/bin/java
4348	465068	593392	/usr/java/jdk1.5.0_12/bin/java
2765	280936	375268	/opt/hp/hpsmh/sbin/hpsmhd
3108	113008	114724	hpasmd
3184	61804	63412	cmahealthd
3175	20696	22304	cmastdeqd
2456	16780	101612	/usr/sbin/snmpd
3128	10892	12620	cmapeerd
3276	10628	13080	cmafcad
3141	10596	12496	cmahostd
4052	10476	15552	/usr/local/wrapper/bin/wrapper
3412	10448	19892	dbus-daemon-1
3278	10436	11960	cmaided
3434	3944	17824	hald
2739	3324	96588	/opt/hp/hpsmh/sbin/hpsmhd
2551	1592	34996	sendmail:
2559	1448	27788	sendmail:
2800	1044	10260	xfs
	6859676	8575744	

Question remains, which one is right free or top, if top, then where is
my memory on machine 1, if ps -eo, then how come free does not show all
the memory used. 

-Jai


-----Original Message-----
From: redhat-list-bounces@xxxxxxxxxx
[mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Jai Rangi
Sent: Thursday, June 19, 2008 4:20 PM
To: redhat-list@xxxxxxxxxx
Subject: Memory Management on RHEL4 

Did a lot of googling without much success, and now I am here for some
help on Memory Management. 

I have total of 8GB RAM, on two servers

Out put from free command, 

On Machine 1

             total       used       free     shared    buffers
cached

Mem:       8104664    8084304      20360          0       7848
64284

-/+ buffers/cache:    8012172      92492

Swap:      2031608    1001964    1029644

 

On Machine 2 

             total       used       free     shared    buffers
cached

Mem:       8104664    3571624    4533040          0      30568
1016700

-/+ buffers/cache:    2524356    5580308

Swap:      2031608          0    2031608

When I run this command on machine1 and machine2 

ps -eo pid,size,vsize,cmd --sort -size | head -n 25 | awk '{print $1
"\t" $2 "\t" $3 "\t" $4}'

 

I get these results, 

 

machine1

 

 

 

 

 

 

Machine2  

 

 

 

 

 

PID

SZ

VSZ

CMD

 

 

 

PID

SZ

VSZ

CMD

 

 

30394

2950768

3083044

/usr/java/jdk1.5.0_12/bin/java

 

4164

2120244

2251492

/usr/java/jdk1.5.0_12/bin/java

11497

1342440

1568004

java

 

 

 

4054

1281480

1507044

java

 

 

32390

600596

727888

/usr/java/jdk1.5.0_12/bin/java

 

4256

501332

730232

/usr/java/jdk1.5.0_12/bin/java

29523

561132

790028

/usr/java/jdk1.5.0_12/bin/java

 

4320

490952

724420

/usr/java/jdk1.5.0_12/bin/java

31848

529884

664404

/usr/java/jdk1.5.0_12/bin/java

 

4195

488836

616132

/usr/java/jdk1.5.0_12/bin/java

12880

525296

653620

/usr/java/jdk1.5.0_12/bin/java

 

4227

476356

604680

/usr/java/jdk1.5.0_12/bin/java

9446

510412

641028

/usr/java/jdk1.5.0_12/bin/java

 

4291

467356

597976

/usr/java/jdk1.5.0_12/bin/java

21577

508136

636456

/usr/java/jdk1.5.0_12/bin/java

 

4348

465068

593392

/usr/java/jdk1.5.0_12/bin/java

2597

293032

387356

/opt/hp/hpsmh/sbin/hpsmhd

 

2765

280936

375268

/opt/hp/hpsmh/sbin/hpsmhd

2943

113012

114728

hpasmd

 

 

 

3108

113008

114724

hpasmd

 

 

3015

61672

63280

cmahealthd

 

 

3184

61804

63412

cmahealthd

 

3010

20696

22304

cmastdeqd

 

 

3175

20696

22304

cmastdeqd

 

27383

16752

101584

/usr/sbin/snmpd

 

 

2456

16780

101612

/usr/sbin/snmpd

 

2961

10892

12620

cmapeerd

 

 

 

3128

10892

12620

cmapeerd

 

 

3112

10628

13080

cmafcad

 

 

 

3276

10628

13080

cmafcad

 

 

2970

10592

12492

cmahostd

 

 

 

3141

10596

12496

cmahostd

 

 

11495

10476

15552

/usr/local/wrapper/bin/wrapper

 

4052

10476

15552

/usr/local/wrapper/bin/wrapper

3243

10448

19892

dbus-daemon-1

 

 

3412

10448

19892

dbus-daemon-1

 

3110

10436

11960

cmaided

 

 

 

3278

10436

11960

cmaided

 

 

3263

3944

17824

hald

 

 

 

3434

3944

17824

hald

 

 

2573

3132

96388

/opt/hp/hpsmh/sbin/hpsmhd

 

2739

3324

96588

/opt/hp/hpsmh/sbin/hpsmhd

2490

1592

34996

sendmail:

 

 

 

2551

1592

34996

sendmail:

 

 

2498

1448

27788

sendmail:

 

 

 

2559

1448

27788

sendmail:

 

 

2584

940

57080

crond

 

 

 

2800

1044

10260

xfs

 

 

Total

8108356

 

 

 

 

 

Total

6859676

 

 

 

 

 

 

1.	Why the total on Machine 2 is not same as Memory used, 
2.	On machine 1, what is using 1 GB from SWAP.

 

Thank you,

 


Jai Rangi

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