high ping latency correlation with high server activity

Hello,

I got a situation that some servers in our network (connected with giga
switch) have sometimes high latency peaks more than 10ms that usually at <1
or =1 ms latency.
those servers are intensive memory,cpu,disk ,network about 30 to 40 %
average usage.
my question ,is there any correlation with those component to the fact that
network monitoring shows sometimes high latency?.
Thanks