The Netflix TechBlog

MAY 4, 2023

Replay Traffic Testing Replay traffic refers to production traffic that is cloned and forked over to a different path in the service call graph, allowing us to exercise new/updated systems in a manner that simulates actual production conditions. Also, since this logic resides on the server side, we can iterate on any required changes faster.

Traffic 339

Traffic Latency Tuning Systems 339

HammerDB

APRIL 19, 2023

Instead, focus on understanding what the workloads exercise to help us determine how to best use them to aid our performance assessment. As database performance is heavily influenced by the performance of storage, network, memory, and processors, we must understand the upper limit of these key components. Operating System: Ubuntu 22.04

Performance 54

Performance Benchmarking Cache Storage 54

All Things Distributed

OCTOBER 2, 2017

percent availability in the event of a server, a rack of servers, or an Availability Zone failure. DynamoDB automatically re-distributes your data to healthy servers to ensure there are always multiple replicas of your data without you needing to intervene. Auto Scaling is on by default for all new tables and indexes.

Internet 128

Internet Internet AWS Performance 128

SQL Performance

NOVEMBER 30, 2021

SQL Server has a cost-based optimizer that uses knowledge about the various tables involved in a query to produce what it decides is the most optimal plan in the time available to it during compilation. Whether the page is dirty or not (a dirty page has changes on it that haven’t yet been written back to durable storage). ) ; GO.

Efficiency 54

Efficiency Servers Database Cache 54

SQL Performance

OCTOBER 20, 2022

When SQL Server reads data under locking read committed isolation (the default for non-cloud offerings) and chooses row-level locking granularity, it normally only locks one row at a time. SQL Server solves this problem using lock classes. SQL Server needs to hold locks in this case to ensure the by-reference LOB pointers remain valid.

Testing 91

Testing Servers Cache Engineering 91

Brendan Gregg

JUNE 30, 2018

sounds like a homework exercise of purely academic value. Networks, PCIe busses, CPU interconnects, memory busses, and storage devices (both throughput and IOPS), all have fixed limits. In some cases, a benchmark may appear to exceed network bandwidth because it returns from a local memory cache instead of the remote target.

Benchmarking 54

Benchmarking Latency Cache Network 54

Brendan Gregg

JUNE 29, 2018

sounds like a homework exercise of purely academic value. Networks, PCIe busses, CPU interconnects, memory busses, and storage devices (both throughput and IOPS), all have fixed limits. In some cases, a benchmark may appear to exceed network bandwidth because it returns from a local memory cache instead of the remote target.

Benchmarking 40

Benchmarking Latency Cache Network 40