Please help me investigate a strange issue.
I have a few SLES 11 SP3 for WMWare x86_64 server where the network responsiveness is very slow is one cpu core is on full load.
The servers are running under vSphere 5.1 with 20GB ram, and have 4x2 CPU configuration. Either the vCPU nor the memory is not overcommitted.
I'am using vmxnet3 network adapter and paravirtual scsi controller. The vmware tools is uptodate, according to the vSphere version.
First I suspected to the load of the ESXi host, but the response time is slow also when I run only one VM on the host.
Please help me with some sugegstions.