Could not reserve enough space for object heap

[ravs]

hi,

this virtual server is hosting few tomcats ...every now and then some tomcat will not start. and throw below errors... even though srvr got free memory at that time (mostly in cache)...to fix, i have to restart few tomcats that are high on VIRT in top o/p...

"Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine"

free -g
total used free shared buffers cached
Mem: 62 57 4 0 0 36
-/+ buffers/cache: 20 42
Swap: 3 0 3

[ravs]

any suggestion guys?

regards
rav