VMware vSphere Client could not connect to vCenter version 5.1.0

Recently we had an issue, where we were unable to connect to one of our VMware ESXi vCenter’s (v5.1.0) with vSphere Client. Everything worked, all virtual machines were up, except vCenter. Digging deeper, the log files revealed the following: 2014-09-19T09:01:09.494+03:00 [02156 warning ‘Default’] [VdbStatement] SQL execution failed: cleanup_events_tasks_proc 2014-09-19T09:01:09.494+03:00 [02156 warning ‘Default’] [VdbStatement] Execution elapsed […]

Context switch can be 3 times slower in virtual environment such as VMware ESX

Tsuna analyzes how match time it takes to make a context switch. All analyzed chips are Multi-core Intel CPUs. OS / scheduler used – standard Linux Kernel. Results: depends on what we call a context switch (theoretical / real world) and what we measure is: 1000 ns – 4500 ns (up to 45000 ns – […]

vmrun – Error: You do not have access rights to this file

VMware vmrun command is very powerful feature of VMware Workstation and ESX server to automate things in virtual machines. Configuring automated script for Windows 2008 Server and Windows 2008 R2 was easy task. Everything went as expected. However the same script failed on Windows Vista and Windows 7 with the following two errors: for vmrun […]