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. It helps expose memory leaks, deadlocks, caching issues, and other system issues.

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

In addition, DynamoDB Accelerator (DAX) a fully managed, highly available, in-memory cache further speeds up DynamoDB response times from milliseconds to microseconds and can continue to do so at millions of requests per second. Auto Scaling is on by default for all new tables and indexes.

Internet 128

Internet Internet AWS Performance 128

The Morning Paper

DECEMBER 8, 2019

The beauty of persistent memory is that we can use memory layouts for persistent data (with some considerations for volatile caches etc. This is left as an exercise for the application developer at present. in front of that memory , as we saw last week). In particular, it’s goodbye to the POSIX interface. What about security?

Hardware 56

Hardware Programming Media Storage 56

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

SQL Performance

NOVEMBER 30, 2021

Whether the page is dirty or not (a dirty page has changes on it that haven’t yet been written back to durable storage). The last time the page was referenced (used by the lazy writer to help implement the least-recently-used algorithm that creates free space when needed). The memory location of the 8KB page in the buffer pool.

Efficiency 54

Efficiency Servers Database Cache 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