John McCalpin

FEBRUARY 17, 2025

The Multicore Era Over the past ~15 years, server processors from Intel and AMD have evolved from the early quad-core processors to the current monsters with over 50 cores per socket. The example below is for a 2005-era processor with 60 ns memory latency and 6.4 cache lines -> 5.6 cache lines -> 5.6

Latency 71

Latency Hardware Cache Systems 71

Dynatrace

DECEMBER 22, 2021

Metrics are measures of critical system values, such as CPU utilization or average write latency to persistent storage. For example, in 2005, Dynatrace introduced a distributed tracing tool that allowed developers to implement local tracing and debugging. Observability is made up of three key pillars: metrics, logs, and traces.

Artificial Intelligence 245

Artificial Intelligence Metrics Architecture DevOps 245

John McCalpin

FEBRUARY 17, 2025

The Multicore Era Over the past ~15 years, server processors from Intel and AMD have evolved from the early quad-core processors to the current monsters with over 50 cores per socket. The example below is for a 2005-era processor with 60 ns memory latency and 6.4 cache lines -> 5.6 cache lines -> 5.6

Latency 40

Latency Hardware Cache Systems 40

Brendan Gregg

AUGUST 8, 2017

The oldest change in the entire Linux repo dates back to 2005, when Linus imported Linux 2.6.12-rc2, Thankfully, I found some older linux-devel mailing list archives, rescued from server backups, often stored as tarballs of digests. It's time in some cgroup paths, but this server is not doing much disk I/O. to the load average.

Latency 111

Latency Metrics C++ Systems 111

SQL Performance

FEBRUARY 22, 2021

I would like to share a couple of recent examples that help illustrate how using deprecated SQL Server features continues to bite us. The system table sys.sysprocesses was replaced way back in SQL Server 2005 by a set of dynamic management views (DMVs), most notably sys.dm_exec_requests , sys.dm_exec_sessions , and sys.dm_exec_connections.

Latency 57

Latency Servers Monitoring Systems 57

Dean Hume

APRIL 24, 2018

As data centers and volumes of servers have grown, so has the overall amount of electricity consumed around the world. Electricity used by servers doubled between 2000 and 2005 (and has continued growing ever since) from 12 billion to 23 billion kilowatt hours. Server Power Consumption (Source: Intel Labs 2008).

Energy 40

Energy Cache Traffic Website 40

Dean Hume

APRIL 24, 2018

As data centers and volumes of servers have grown, so has the overall amount of electricity consumed around the world. Electricity used by servers doubled between 2000 and 2005 (and has continued growing ever since) from 12 billion to 23 billion kilowatt hours. Server Power Consumption (Source: Intel Labs 2008).

Energy 40

Energy Cache Traffic Website 40