1 min read 0 Postgres Benchmarking with Postgres PT2 gary June 28, 2019 In this example we run pgbench with a scale factor of 1000 which equates to a database size of around…
2 min read 0 Postgres Benchmarking with Postgres PT1 gary June 28, 2019 In this example, we use Postgres and the pgbench workload generator to drive some load in a virtual machine. Assume…
2 min read 0 Nutanix Install a bitnami image to Nutanix AHV cluster. gary June 28, 2019 One of the nice things about using public cloud is the ability to use pre-canned application virtual appliances created by…
1 min read 0 Storage Performance Paper: A Nine year study of filesystem and storage benchmarking gary May 6, 2019 A 2007 paper, that still has lots to say on the subject of benchmarking storage and filesystems. Primarily aimed at…
2 min read 0 Postgres Performance gains for postgres on Linux with hugepages gary March 7, 2019 For this experiment I am using Postgres v11 on Linux 3.10 kernel. The goal was to see what gains can…
2 min read 0 Nutanix Nutanix AES: Performance By Example PT2 gary December 18, 2018 How to improve large DB read performance by 2X Nutanix AOS 5.10 ships with a feature called Autonomous Extent Store…
2 min read 0 Nutanix Nutanix AES: Performance By Example. gary December 17, 2018 How to reduce database restore time by 50% During .Next 2018 in London, Nutanix announced performance improvements in the core-datapath…
2 min read 0 Nutanix How scalable is my Nutanix cluster really? gary November 20, 2018 In a previous post I showed a chart which plots concurrency [X-axis] against throughput (IOPS) on the Y-Axis. Here is that…
1 min read 0 X-Ray Nutanix Working with fio “distribution /pereto” parameter gary November 12, 2018 The fio Pareto parameter allows us to create a workload, which references a very large dataset, but specify a hotspot…
3 min read 0 Nutanix You are here. The art of HCI performance testing gary November 9, 2018 At some point potential Hyper-converged infrastructure (HCI) users want to know – “How fast does this thing go?”. The real…
3 min read 0 X-Ray X-Ray scenario to demonstrate Nutanix ILM behavior. gary October 25, 2018 Specifically a customer wanted to see how performance changes (and how quickly) as data moves from HDD to SSD automatically…
2 min read 0 X-Ray HCI Performance testing made easy (Part 4) gary September 27, 2018 What happens when power is lost to all nodes of a HCI Cluster? Ever wondered what happens when all power…
5 min read 0 X-Ray HCI Performance testing made easy (Part 3) gary September 17, 2018 Creating a HCI benchmark to simulate multi-tennent workloads HCI deployments are typically multi-tennant and often different nodes will…
1 min read 0 X-Ray HCI Performance testing made easy (Part 2) gary September 11, 2018 A simple benchmark for Random Reads, Random Writes, Sequential Reads, Sequential Writes.
1 min read 0 X-Ray HCI Performance testing made easy (Part 1) gary September 7, 2018 How to create a customized performance test using X-ray.
2 min read 0 Storage Performance Storage Bus Speeds 2018 gary April 8, 2018 Storage bus speeds with example storage endpoints. Bus Lanes End-Point Theoretical Bandwidth (MB/s) Note SAS-3 1 HBA <-> Single SATA…
4 min read 0 Nutanix Detecting and correcting hardware errors using Nutanix Filesystem. gary March 15, 2018 It’s good to detect corrupted data. It’s even better to transparently repair that data and return the correct data to…
4 min read 0 Miscellaneous Meltdown, speculative execution and side-channels explainer. gary January 23, 2018 There are a lot of explanations for the current Meltdown/Spectre crisis but many did not do a good job of…
1 min read 0 Miscellaneous Simple statistics for performance analysts. gary January 18, 2018 As performance analysts we often have to summarize large amounts of data in order to make engineering decisions or understand…