Memory use

[[iso-8859-1] José Angel Blanco González]

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After one or two hours of running my red hat linux 9 machine the Ram memory 
is fully ocupied, by programs and disk cache.
Then the system starts swaping and MailScanner reduces performance 
drastically.

Our systen has:
Mailscanner 4.45.4
Sendmail 8.12.8
Clamav 0.84
Spamassassin

Here is the capture for 'free' command
                    total            used            free        shared 
buffers        cached
Mem:            2840672    2812672     28000    0                126556 
2449792
-/+ buffers/cache:            236324       2604348
Swap:           1044184    77396         966788

Any idea?
Thank you very much

Jose

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