Brendan Gregg

AUGUST 18, 2019

For example, iostat(1), or a monitoring agent, may tell you your average disk latency, but not the distribution of this latency. For smaller environments, it can be of more use helping eliminate latency outliers. Kernel dynamic tracing of read() bytes bpftrace -e 'kretprobe:vfs_read { @bytes = lhist(retval, 0, 2000, 200) }'.

Latency 57

Latency C++ Cache Programming 57

Brendan Gregg

OCTOBER 8, 2018

Screenshot: tracing read latency for PID 181: # bpftrace -e 'kprobe:vfs_read /pid == 30153/ { @start[tid] = nsecs; } kretprobe:vfs_read /@start[tid]/ { @ns = hist(nsecs - @start[tid]); delete(@start[tid]); }'. Back then I could already tell if disks were seeking by interpreting iostat(1) output: seeing high disk latency but small I/O.

C++ 105

C++ Virtualization Programming Latency 105

Testsigma

DECEMBER 12, 2020

This kind of approach is although a victim of latency and delayed execution. No matter what kind of cloud-based tool you are using, the latency is bound to happen since there are too many requests involved in between. This leaves the developer and tester with just selecting and analyzing the website on these browsers.

Testing 53

Testing Operating System Website Infrastructure 53

SQL Server According to Bob

JANUARY 11, 2020

Books Online (BOL) References: ​​ All BOL references cited in this paper are taken from the Microsoft SQL Server 2000 Books Online site (updated to include SP3 functionality), which can be found at: [link] Click the Product Documentation link. SQL Server 2000/7.0 data pages are 8 KB in size.

Servers 40

Servers Cache Media Hardware 40

Alex Russell

APRIL 29, 2021

For heavily latency-sensitive use-cases like WebXR, this is a critical component in delivering a good experience. CSS color(). Wide gamut colour is important in creative applications. Chrome does not yet support this for CSS, but is under development for <canvas> and WebGL. Licensing concerns caused Chrome to ship WebP instead.

Media 145

Media Games Education Engineering 145

Alex Russell

JUNE 20, 2020

Consider the set of features the circa-2000 web could handle: Starting from a text-only document format in 1990, the web added features at a furious pace in the first decade, but not in a principled way. Other use-cases weren't addressable with early 2000's tech. 86 06:16 PM · Jun 21, 2020. But not every application can make the leap.

Games 64

Games Hardware Java Mobile 64

Dean Hume

APRIL 24, 2018

Electricity used by servers doubled between 2000 and 2005 (and has continued growing ever since) from 12 billion to 23 billion kilowatt hours. Without effective caching on the client, the server will see an increase in workload, more CPU usage and ultimately increased latency for the end user.

Energy 40

Energy Cache Traffic Website 40

Dean Hume

APRIL 24, 2018

Electricity used by servers doubled between 2000 and 2005 (and has continued growing ever since) from 12 billion to 23 billion kilowatt hours. Without effective caching on the client, the server will see an increase in workload, more CPU usage and ultimately increased latency for the end user.

Energy 40

Energy Cache Traffic Website 40

Dean Hume

APRIL 24, 2018

Electricity used by servers doubled between 2000 and 2005 (and has continued growing ever since) from 12 billion to 23 billion kilowatt hours. Without effective caching on the client, the server will see an increase in workload, more CPU usage and ultimately increased latency for the end user.

Energy 40

Energy Cache Traffic Website 40

The Agile Manager

JULY 29, 2007

Looking backward, over the last 10 years the IT market has absorbed the new capacity in Asia and South America, yet still we find global and national/regional IT employment is up since 2000. 1 Looking forward, all indications are that demand will continue to rise. It is possible, though, to take an objective assessment of IT capability.

Government 40

Government Open Source Latency Code 40

Brendan Gregg

OCTOBER 7, 2018

Screenshot: tracing read latency for PID 181: # bpftrace -e 'kprobe:vfs_read /pid == 30153/ { @start[tid] = nsecs; } kretprobe:vfs_read /@start[tid]/ { @ns = hist(nsecs - @start[tid]); delete(@start[tid]); }'. Back then I could already tell if disks were seeking by interpreting iostat(1) output: seeing high disk latency but small I/O.

C++ 40

C++ Virtualization Programming Latency 40

SQL Server According to Bob

JANUARY 11, 2020

The ​​ SQL Server 2000 I/O Basics ​​ document is a prerequisite to ​​ the information contained in this ​​ document. and ​​ 2000. SQL Server 2000, and SQL Server 2005. SQL Server 6. However, as explained above, the SQL Server 6.

Servers 40

Servers Cache Database Media 40

Smashing Magazine

SEPTEMBER 29, 2021

If both AVIF and WebP are not viable options, consider evaluating MozJPEG (optimize JPEG images), OxiPNG (non-photographic images), or JPEG 2000 (lossy or lossless photographic images). CDN servers are often located closer to users than origin servers and can have a shorter round-trip times (RTT), improving network latency.

Open Source 145

Open Source Speed Website Google 145

Percona

MAY 15, 2023

Let’s see the write operations with 24 and 64 threads: We get a gain of ~33% just using sharding, while for latency, we do not have a cost. sec) + -+ | count(*) | + -+ | 113 | + -+ 1 row in set (0.00 sec) + -+ | count(*) | + -+ | 287 | + -+ 1 row in set (0.01 NULL | 1 | 0 | NULL | | 0 | 100 | 2040 | ^SELECT.*FOR

Traffic 144

Traffic Scalability Database Servers 144