Originally Posted by james_in_denver
When your system get's to 100% cpu, what does the "top" command show you is using the most memory/CPU ???
Well, when i restart my linux box, he work fine and without problem with normal cpu, but when my memory usage at nearly 100%, so the CPU get's to alternating between 0 and 100%, and the server´s performance goes to down, see my "top" command 3 hours after the boot:
11:07:53 up 3:34, 1 user, load average: 0.10, 0.17, 0.13
172 processes: 171 sleeping, 1 running, 0 zombie, 0 stopped
CPU states:cpu user nice system irq softirq iowait idle
total 0.0% 0.0% 0.0% 33.3% 33.2% 33.4% 0.0%
Mem: 1032756k av, 522520k used, 510236k free, 0k shrd, 72132k buff
162528k active, 291036k inactive
Swap: 522104k av, 0k used, 522104k free 172688k cached
In this case, the CPU get´s 100%, but he back to work normal. When the memory usage is 100% teh CPU is alternating full time, between 0 and 100%, and the all perfomance down. and some client´s loses the connection with the server, see the message from outlook:
Task 'mail.xxxxx.com.br - Sending' reported error (0x80042109) : 'Outlook is unable to connect to your outgoing (SMTP) e-mail server. If you continue to receive this message, contact your server administrator or Internet service provider (ISP).'
Task 'mail.xxxxx.com.br - Receiving' reported error (0x800CCC0F) : 'The connection to the server was interrupted. If this problem continues, contact your server administrator or Internet service provider (ISP).'