Tag: Performance
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Balanced Memory Configuration for ESXi Servers
Background ESXi servers are fundamental infrastructure. The underly hardware performance has a butterfly effect on the upper layer virtual machines and applications. Since there is less than 10% performance overhead on the virtualization layer. So it’s valuable to get full performance on the hardware layer. Memory is a big player in hardware performance tuning. Balanced…
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Network Latency on Virtual Machine
Slight network latency may cause application problem on sensitive virtual machines. Even the network responding time is just 3 or 7 ms. There is a way to improve the stability of responding latency – Enable RSS on NIC. Network traffic is handled by single CPU core when RSS is disabled. Enable it will distribute the…
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FC Traffic Drops After IOM Reset/Reseat/Cable Pull or UCS Upgrade
I just found a Cisco KB descripts a firmware issue may impact to ESXi FC storage performance. Please have a look whether your Cisco UCS system firmware is 2.1(2a), 2.1(2c), or 2.1(2d).