High load and delays

I have noticed that the server has been slow in some periods of the day, it took until recently to restart. Today I managed to get into the shell and got some information that possibly be paramount to solving the problem.

Now:

On WHM
Load Averages: 5.21 1.79 0.99

root@whm01 [~]# top
10326 root 20 0 76940 17m 4672 R 100.0 0.2 0:11.62 whostmgr10
10323 root 20 0 76936 17m 4672 R 94.7 0.2 0:11.17 whostmgr10
10327 root 20 0 76940 17m 4672 R 92.7 0.2 0:10.18 whostmgr10


root@whm01 [~]# free -m
total used free shared buffers cached
Mem: 7870 6421 1448 0 348 4608
-/+ buffers/cache: 1464 6405
Swap: 2046 20 2026



[Removed - Too Many References to actual domain names]