TOMCAT is getting "eating" my server

TOMCAT is getting "eating" my server... or it is my imagination ???
This processes takes lot of time as you can see "8672m" and "5255m".. and it is used by only two sites with JSP DBs.. what can I do to reduce the amount of cpu and memory consumed ?

Code:

top -c
 19:38:27  up 7 days, 20:53,  1 user,  load average: 2,26, 2,37, 2,44
234 processes: 231 sleeping, 3 running, 0 zombie, 0 stopped
CPU states:  cpu    user    nice  system    irq  softirq  iowait    idle
           total   44,1%    0,0%   10,3%   0,0%     0,0%    1,3%   44,0%
           cpu00   48,9%    0,0%   31,4%   0,0%     0,3%    0,3%   18,8%
           cpu01   18,1%    0,0%    9,1%   0,0%     0,0%    4,9%   67,7%
           cpu02   43,4%    0,0%    0,3%   0,0%     0,0%    0,0%   56,1%
           cpu03   66,2%    0,0%    0,3%   0,0%     0,0%    0,0%   33,3%
Mem:  2055244k av, 1644976k used,  410268k free,       0k shrd,   87816k buff
                    972908k actv,  307560k in_d,   24432k in_c
Swap: 2048276k av,  129808k used, 1918468k free                  979876k cached

  PID USER     PRI  NI  SIZE  RSS SHARE STAT %CPU %MEM   TIME CPU COMMAND
 3045 tomcat    25   0 28656 1144   572 R    24,8  0,0  8672m   3 jsvc.exec -user tomcat -cp ./bootstrap.jar -Djava.endorsed
 2871 tomcat    25   0 28656 1144   572 R    24,7  0,0  5255m   0 jsvc.exec -user tomcat -cp ./bootstrap.jar -Djava.endorsed
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