Memory Management on RHEL4

[Jai Rangi]

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