Ever wondered what it takes to debug performance issues on a VMware stack? How do you figure out if the performance issue is in your virtual machine, or the network layer, or the storage layer, or the hypervisor layer?
Here’s a handy tutorial that showcases a systematic approach for troubleshooting performance using tools like Esxtop, vSCSI stats and Net stats on a VMware stack. The tutorial also talks about some very useful optimizations and performance best practices.
Thanks to Ramprasad K. S. for putting together the slides based on his vast experience dealing with customer issues. Thanks also to Ramprasad and Sai Inabattini for presenting this at the CMG India 2nd Annual conference in Bangalore in November 2015, which was received very well.
VMware vCenter Server 6.0 brings significant improvements over previous vCenter server versions with respect to cluster size and performance. vCenter Server 6.0 supports up to 64 ESXi Hosts and 8000 VMs in a single cluster. A new white paper, ” VMware vCenter Server 6.0 Cluster Performance “, describes the improvements along several dimensions:
- VMware vCenter 6.0 can support more hosts and more VMs in a cluster.
- VMware vCenter 6.0 can support higher operational throughput in a cluster.
- VMware vCenter 6.0 can support higher operational throughput with ESXi 6.0 hosts.
- VMware vCenter 6.0 VCSA can support higher operational throughput in a cluster, compared to vCenter Server on Windows.
Here is a chart from the white paper summarizing one of the key improvements: operational throughput in a cluster:
vCenter Server 6.0 Cluster Performance Improvement
VMware® vCenter database stores meta data on the state of
a VMware vSphere environment and is a key component of vCenter performance.
We recently ran performance micro-benchmarks on a vCenter
4.0 database with Microsoft SQL Server 2008 and published a Performance white
This paper presents the performance results of the
micro-benchmarks and provides best practices information for configuring a vCenter 4.0 database. The paper also provides
information for sizing the server you use to host the vCenter database based on
these performance results. The examples and performance data presented in this
study are specific to Microsoft SQL Server and the paper assumes that you have
a working knowledge of SQL Server.