SQL Performance

SEPTEMBER 17, 2019

For years SSRS was bundled with the installation of SQL Server, which helped add to some of the confusion around licensing and support for the product, so beginning with SSRS 2017, the installation package for Reporting Services is a separate download. Tuning Options. Tuning SSRS is much like any other application.

Tuning 67

Tuning Servers Database Best Practices 67

Brendan Gregg

MAY 16, 2017

A latency outlier issue that happened every 15 minutes. For Linux, I've also done tuning, kernel analysis, [gdb], testing of [hist triggers], testing of some perf patches, and contributed a few trivial patches of my own. html [The PMCs of EC2]: /blog/2017-05-04/the-pmcs-of-ec2.html Java core dump analysis for a crashing JVM. -

Java 75

Java Entertainment Engineering Scalability 75

Brendan Gregg

SEPTEMBER 5, 2017

Here's some output from my zfsdist tool, in bcc/BPF, which measures ZFS latency as a histogram on Linux: # zfsdist. Tracing ZFS operation latency. Both Xen and KVM have had many performance and security improvements, and workloads can now be tuned to run at almost bare metal speeds (say, a 3% loss or less). Hit Ctrl-C to end. ^C

Virtualization 76

Virtualization AWS Engineering Hardware 76

The Netflix TechBlog

OCTOBER 19, 2020

If we had an ID for each streaming session then distributed tracing could easily reconstruct session failure by providing service topology, retry and error tags, and latency measurements for all service calls. Our engineering teams tuned their services for performance after factoring in increased resource utilization due to tracing.

Infrastructure 233

Infrastructure Transportation Storage Open Source 233

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. The change was obvious in the production graphs, showing a drop in write latencies: Once tested more broadly, it showed the write latencies dropped by 43%, delivering slightly better performance than on CentOS.

Speed 126

Speed Java AWS Virtualization 126

KeyCDN

JANUARY 31, 2019

The next closest active POP location to Bucharest was Istanbul which was still almost 900km away; this distance adds up in terms of latency. As for Romania, it covers an area of over 238,000 square kilometers and as of 2017 had a population of almost 20 million. In 2017, the average speed was 21.33Mb/s ranking them 18th in the world.

Internet 48

Internet Internet Ecommerce Speed 48

KeyCDN

OCTOBER 24, 2018

Although both countries are relatively close to one another, they are separated by a distance of approximately 500km, which adds up in terms of latency. According to Wikipedia , the average connection speed in Q1 of 2017 was 20.5Mbps. This is a massive increase from year 2000 when only 37.2% of the population were Internet users.

Internet 48

Internet Internet Speed Network 48