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Building Netflix’s Distributed Tracing Infrastructure

The Netflix TechBlog

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.

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The Speed of Time

Brendan Gregg

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
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KeyCDN Launches POP in Romania

KeyCDN

The next closest active POP location to Bucharest was Istanbul which was still almost 900km away; this distance adds up in terms of latency. Alternatively, If you would like to request a POP in a certain location or a new feature please let us know on our feature requests community page and stay tuned for more exciting announcements.

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Updated Azure SQL Database Tier Options

SQL Performance

Microsoft took that idea and built a new compute tier called Azure SQL Database serverless, which became generally available in November 2019. This works well for many SQL Server workloads, however, there have been use cases for a lower CPU latency and higher clock speed for CPU-heavy workloads and a need for higher memory per vCore.

Azure 55
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How to maximize CPU performance for PostgreSQL 12.0 benchmarks on Linux

HammerDB

rc3-custom #1 SMP Mon Aug 12 14:07:33 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux Welcome to Ubuntu 19.04 (GNU/Linux 5.3.0-rc3-custom It is always accepted that there may be options to tune the stored procedures or postgresql.conf for some gains, however this does impact the core argument around database scalability). rc3-custom x86_64).

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The Speed of Time

Brendan Gregg

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 40
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The Netflix Cosmos Platform

The Netflix TechBlog

It supports both high throughput services that consume hundreds of thousands of CPUs at a time, and latency-sensitive workloads where humans are waiting for the results of a computation. The subsystems all communicate with each other asynchronously via Timestone, a high-scale, low-latency priority queuing system. Warm capacity.