December 4, 2008 09:45pm pst

1. Sembee 183,501
2. kieran_b 137,862
3. mass2612 69,024
4. tigermatt 67,575
5. jar3817 59,827
6. rid 58,932
7. Chris-Dent 58,180
8. rakeshmig... 57,833
9. LeeDerby... 53,412
10. peakpeak 45,525
11. grblades 40,912
12. fishadr 39,954
13. LegendZM 38,780
14. cshepfam 38,198
15. war1 37,480
16. isaman07 36,670
17. mattee76 35,948
18. TechSoEasy 34,150
19. abhaigh 33,950
20. Network... 30,450
21. Richard_... 29,932
22. nfmartins 29,775
23. ATIG 28,689
24. bevhost 27,509
25. Paka 27,168

1. Sembee 601,525
2. kieran_b 137,862
3. rakeshmig... 123,806
4. tigermatt 105,239
5. ATIG 100,318
6. mass2612 100,074
7. rid 80,682
8. grblades 76,922
9. LeeDerby... 70,677
10. Chris-Dent 68,280
11. jar3817 67,202
12. war1 67,099
13. TechSoEasy 59,075
14. redseatec... 55,080
15. peakpeak 51,025
16. darkstar3d 50,246
17. cshepfam 45,498
18. fishadr 39,954
19. czcdct 38,939
20. LegendZM 38,780
21. mattee76 36,948
22. isaman07 36,670
23. Network... 35,798
24. patelbg2... 34,900
25. abhaigh 33,950

09.24.2008 at 08:00AM PDT, ID: 23758916

	[x] Attachment Details

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8.6

How to deal with High Cpu Load Average?

Asked by multisites in Email Servers, Linux, Web Servers

Hi:

I have a Linux Centos Server running as just an email Server (POP and SMTP). Sometimes during the day, in specific moments (not all the time) we have seen very high values for Cpu Load Average Time, around 70.x and more, and it is becoming more and more frequent. When this happens it is really difficult to send and/or read emails in the Server.

Another point: I realized that whenever it happens to this Server, Amavisd is on top and has many occurrences. So now what I need is really find out what happens to put amavisd so high on the top.

My question: when this situation occurs, is there any way, through specific Linux commands or by constructing a smart Script, to inspect it in real time and find out if an attack is happening, or identify if these are coming in great amount from any specific IP address(es), or something like this?

It would help me a lot, because if I find it out I could put the suspect IP address(es) in a black list or block them in my Firewall, etc.

Please, help me.

Mario./Start Free Trial

Keywords: How to deal with High Cpu Load Avera…

	Title
1	Centos 5 slower than Centos 4.5
2	NDR Attacks
3	Heavy CPU load on my production syst…
4	Cisco ASA5505 - ESMTP Inspection
5	centos 5 load problem
6	ip inspect rules

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20081112-EE-VQP-43 / EE_QW_2_20070628

How to deal with High Cpu Load Average?

Asked by multisites in Email Servers, Linux, Web Servers

About this solution