Brendan Gregg

DECEMBER 31, 2017

My last talk for 2017 was at AWS re:Invent, on "How Netflix Tunes EC2 Instances for Performance," an updated version of my [2014] talk. WARNING: These tunables were developed in late 2017, for Ubuntu Xenial instances on EC2.** Virtual Memory. Casey Rosenthal (traffic and chaos) Models of Availability. schedtool –B PID.

Tuning 61

Tuning AWS Best Practices Network 61

Brendan Gregg

DECEMBER 30, 2017

My last talk for 2017 was at AWS re:Invent, on "How Netflix Tunes EC2 Instances for Performance," an updated version of my [2014] talk. WARNING: These tunables were developed in late 2017, for Ubuntu Xenial instances on EC2.** Virtual Memory. Casey Rosenthal (traffic and chaos) Models of Availability. schedtool –B PID.

Tuning 52

Tuning AWS Best Practices Network 52

Brendan Gregg

SEPTEMBER 25, 2021

CLI tools The Cassandra systems were EC2 virtual machine (Xen) instances. Since instances of both CentOS and Ubuntu were running in parallel, I could collect flame graphs at the same time (same time-of-day traffic mix) and compare them side by side. This was much worse many years ago on Xen virtual machine guests.

Speed 126

Speed Java AWS Virtualization 126

SQL Server According to Bob

DECEMBER 18, 2018

Durability is a cornerstone of any database system and starting with SQL Server 2017 on Linux Cumulative Update 6 (CU6), SQL Server on Linux enables “Forced Flush” behavior as described in this article , improving durability on non-Fua optimized systems. “Be product: Virtual Disk. Msft Virtual Disk 1.0 Starting with the Linux 4.18

Servers 90

Servers Media Cache Storage 90

Brendan Gregg

SEPTEMBER 5, 2017

Search for recent blog posts on Linux containers, and try them out, and you'll piece together their capabilities and workings bit by bit. What happens if processes really do try to populate all that virtual memory? There's a lot about Linux containers that isn't well documented yet, especially since it's a moving target.

Virtualization 76

Virtualization AWS Engineering Hardware 76

The Symphonia

DECEMBER 6, 2017

Correspondingly, 3GB functions should see a 2x CPU performance improvement over 1.5GB Lambdas, but this is through doubling the number of cores the function has access to, rather than double the virtualized time-slices. Traffic shaping / canary deployment was pre-announced at Serverless Conf NYC in October, and this is now available.

Serverless 40

Serverless Lambda AWS Traffic 40

Percona

AUGUST 15, 2023

This blog was originally published in February 2017 and was updated in August 2023. It’s a rather new plugin build for virtual synchronous replication. wsrep patches / Galera Library This solution is virtually synchronous, which is comparable to Group Replication. and was GA’ed in MySQL 5.7.17.

Servers 52

Servers Database Availability Traffic 52