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PostgreSQL Connection Pooling: Part 4 – PgBouncer vs. Pgpool-II

Scalegrid

In our final post, we will put them head-to-head in a detailed feature comparison and compare the results of PgBouncer vs. Pgpool-II performance for your PostgreSQL hosting ! PgBouncer provides a virtual database that reports various useful statistics. Performance Testing. Throughput Benchmark. Part 2 – PgBouncer.

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AMD EPYC Processors in Azure Virtual Machines

SQL Performance

Back on December 5, 2017, Microsoft announced that they were using AMD EPYC 7551 processors in their storage-optimized Lv2-Series virtual machines. The AMD EPYC 7551 processor has slightly lower single-threaded CPU performance when compared to the older 2.3 Figure 1: CPU-Z Benchmark Results for LS16v2.

Azure 42
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HammerDB v4.8 New Features : Viewing your Benchmark results with the HammerDB Web Service

HammerDB

Turning Jobs Off and On Of course one of the most important aspects is to be able to disable the functionality. We can now see the list of Jobs we generated with autopilot, that they all ran successfully, and also pinpoint the highest performance. In HammerDB v4.7 Copy Code Copied Use a different Browser C:Program FilesHammerDB-4.8>hammerdbws

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What programming languages does HammerDB use and why does it matter?

HammerDB

HammerDB is a load testing and benchmarking application for relational databases. On high-performance multi-core systems all the supported databases can return performance in the many millions of transactions per minute. Basic Benchmarking Concepts. To benchmark a database we introduce the concept of a Virtual User.

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A MyRocks Use Case

Percona

The use case is the TPC-C benchmark but executed not on a high-end server but on a lower-spec virtual machine that is I/O limited like for example, with AWS EBS volumes. I decided to use a virtual machine with two CPU cores, four GB of memory, and storage limited to a maximum of 1000 IOPs of 16KB. MyRocks Vs InnoDB.

Storage 56
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A look behind the scenes of AWS Lambda and our new Lambda monitoring extension

Dynatrace

Of course, this requires a VM that provides rock-solid isolation, and in AWS Lambda, this is the Firecracker microVM. In this case, as the provisioning life cycle diagram shows, the worker node has to be provisioned with the given Lambda function, which does, of course, take some time. The virtual CPU is turned off.

Lambda 215
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The Return of the Frame Pointers

Brendan Gregg

I'm sure this delivered large performance improvements and I wouldn't try arguing against it. While that Java change led to discovering countless performance wins in application code, libc was still breaking some portion of the samples (as pictured in the example at the top of this post) and preventing off-CPU flame graphs.

Java 145