Brendan Gregg

JULY 2, 2021

cachestat File system cache statistics line charts. The architecture is: While the bpftrace binary is installed on all the target systems, the bpftrace tools (text files) live on a web server and are pushed out when needed. BPF didn't exist on those versions, so I used basic Ftrace capabilities that were available on Linux 3.2.

Latency 145

Latency Cache Energy Systems 145

KeyCDN

DECEMBER 8, 2022

A WordPress website comprises many parts, including web servers and their settings, different plugins, and themes. Many factors affect the speed of your WordPress website; some of them are: Your web host Server-side optimizations (PHP version, compression, caching, etc.) It is challenging to figure out why WordPress is slow.

Cache 52

Cache Website Speed Website Performance 52

SQL Performance

SEPTEMBER 25, 2019

The general idea is to cache and replay results, saving repeated executions of inner-side operators wherever possible. When a spool is able to replay cached results, this is known as a rewind. You may find it helpful to think of a spool rebind as a cache miss, and a rewind as a cache hit. Lazy Table Spool.

Performance 104

Performance Cache Servers Education 104

Smashing Magazine

MAY 25, 2021

If the web font isn’t available then, we fall back to the fallback font, but the next page navigation (or a reload of this page) will use the font — as it should have finished downloading now. It’s also trickier to handle cached fonts we already have, not to mention differences in various fallback styles.

Operating System 143

Operating System Google Website Cache 143

SQL Performance

MAY 16, 2019

Without this guarantee, SQL Server might add index rows that are not sorted correctly, which would not be good. For INSERT.SELECT , SQL Server makes its own determination whether to ensure rows are presented to the Clustered Index Insert operator in key order or not. DMLRequestSort Conditions.

Cache 67

Cache Servers Testing Storage 67

SQL Performance

OCTOBER 20, 2022

This was convenient for the demos but repeatable read isolation isn’t common in everyday use. 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.

Testing 91

Testing Servers Cache Engineering 91

Smashing Magazine

JANUARY 6, 2020

Is it worth exploring tree-shaking, scope hoisting, code-splitting, and all the fancy loading patterns with intersection observer, server push, clients hints, HTTP/2, service workers and — oh my — edge workers? It used to provide an insight into how quickly the server outputs any data. What does it mean?

Performance 145

Performance Cache Network Metrics 145

SQL Performance

JUNE 5, 2019

One of the more perplexing problems to troubleshoot in SQL Server can be those related to memory grants. SQL Server’s optimizer estimates how much memory is needed, and the query must obtain the memory grant in order to start executing. sort, hash). If it underestimates memory, then you can see spills in tempdb. million rows.

Servers 41

Servers Cache Database Metrics 41

Percona

MAY 2, 2023

During the logical backups, using client API, the data gets read from the server and returned back to the same API, which will be serialized and written into respective “ bson”, “ json” or “ csv” backup files on disk depending upon the type of backup utilities used. mongodump --host=mongodb1.example.net

Best Practices 52

Best Practices Database Storage Servers 52

SQL Performance

NOVEMBER 22, 2019

SQL Server does not support parallel inserts to a b-tree index. The total memory grant available for sorting is sufficient, but it is evenly split between parallel threads (as usual). Anyway, the point is that sometimes it is not possible for SQL Server to pass an apply outer reference as a parameter to an sTVF. FROM Production.

Servers 77

Servers Cache Database Performance 77

CSS Wizardry

MAY 19, 2020

It’s widely accepted that self-hosted fonts are the fastest option: same origin means reduced network negotiation, predictable URLs mean we can preload , self-hosted means we can set our own cache-control. The median TTFB (including request queueing, DNS, TCP, TLS, and server time) for the Google Fonts CSS file across all tests was 1406ms.

Google 364

Google Media Latency Metrics 364

SQL Performance

MAY 29, 2019

It can be activated from SQL Server 2008 to 2014 inclusive using documented trace flag 610. From SQL Server 2016 onward, FastLoadContext is enabled by default ; the trace flag is not required. For more background, see the Data Performance Loading Guide and the Tiger Team notes on the behaviour changes for SQL Server 2016.

Cache 64

Cache Testing Servers Code 64

Smashing Magazine

JANUARY 7, 2019

Is it worth exploring tree-shaking, scope hoisting, code-splitting, and all the fancy loading patterns with intersection observer, server push, clients hints, HTTP/2, service workers and — oh my — edge workers? Long FMP usually indicates JavaScript blocking the main thread, but could be related to back-end/server issues as well.

Performance 104

Performance Cache Network Metrics 104

Dynatrace

SEPTEMBER 17, 2019

Instead of presenting you with a handful of random screenshots from our demo environment I reached out to Robert, a close friend of mine, who leads a development team with the current task to re-architect and re-platform their multi-tenant SaaS-based eCommerce platform. REDIS for caching. NGINX as an API Gateway. 3 Log Analytics.

AWS 127

AWS Monitoring Ecommerce Lambda 127

Smashing Magazine

MARCH 7, 2022

That user preference is available in two (hopefully soon to be three!) This is available behind a flag in Chrome, but not yet on by default while it finishes standardization. Save Data API. Let’s have a quick recap on the Save Data API. ways: A Save-Data header is sent on each HTTP request. More after jump! How To Act Upon Save Data.

Website 103

Website Media Mobile Network 103

Brendan Gregg

JULY 2, 2021

cachestat File system cache statistics line charts 7. The architecture is: While the bpftrace binary is installed on all the target systems, the bpftrace tools (text files) live on a web server and are pushed out when needed. BPF didn't exist on those versions, so I used basic Ftrace capabilities that were available on Linux 3.2.

Open Source 40

Open Source Latency Cache Energy 40

Percona

JANUARY 4, 2023

You can locate all instruments available in your MySQL version under table setup_instruments. Stage – Instrument starting with ‘stage’ provides the execution stage of any query like reading data, sending data, altering table, checking query cache for queries, etc. For getting familiar, check the PMM demo.

Performance 98

Performance C++ Monitoring Servers 98

SQL Performance

MARCH 8, 2021

SQL Server 2014 SP2 and later produce runtime (“actual”) execution plans that can include elapsed time and CPU usage for each execution plan operator (see KB3170113 and this blog post by Pedro Lopes). SQL Server makes some timing adjustments in parallel plans to promote consistency, but they are not perfectly implemented. TheYear , CA.

Servers 95

Servers Tuning Architecture Processing 95

Smashing Magazine

OCTOBER 8, 2021

Generate your own madlibs in the demo ; Look through the final code on Github ; Get a fully-built version set up in your accounts. We can use 11ty’s new Serverless mode to build them on request using Netlify’s On-Demand Builders to cache each Madlib. Netlify then caches that page on its edge CDN for each additional call.

Serverless 77

Serverless Cache Open Source Code 77

The Netflix TechBlog

NOVEMBER 23, 2020

Introducing gnmi-gateway: a modular, distributed, and highly available service for modern network telemetry via OpenConfig and gNMI By: Colin McIntosh, Michael Costello Netflix runs its own content delivery network, Open Connect , which delivers all streaming traffic to our members. key file were created successfully: $ ls -al server.* -rw-rw-r--

Open Source 186

Open Source Network Transportation Cache 186

Smashing Magazine

JANUARY 21, 2019

An API is the communication channel for an application to load data from the server. This relationship can be expressed through an associative array (an array of key => property) on the server-side, in which each module states its name as the key attribute and its inner modules under the property modules. Large preview ).

Social Media 64

Social Media Database Media Website 64

Smashing Magazine

APRIL 29, 2021

Chrome DevTools allows you to disable modern image formats ( demo ), like WebP, AVIF or JPEG XL, to test differing fallbacks for them in the Rendering panel: Chrome DevTools allows you to test differing fallbacks for WebP, AVIF or JPEG XL in the Rendering panel. will optimize images dynamically upon request and store them in a local cache.

Media 145

Media Network Metrics Mobile 145

Smashing Magazine

AUGUST 31, 2021

This file is rendered on the server and is not re-rendered on the client. You can check a real-world implementation of this ContextAPI pattern in our demo repository. what to do while waiting for the server response. how to handle when data is not available (server error, or no data). zero-config caching layer.

Cache 103

Cache Servers Best Practices Code 103

Abhishek Tiwari

NOVEMBER 3, 2018

If you put your whole website on CDN, technically you don’t need a large number of server infrastructure and CMS licenses. They often get blindsided by vendor’s pitch and end-up making decision based on some fancy demos (see my post from 2014 on Adobe AEM ). i.e. everything you need to render your site. Decoupled CMS vs. headless CMS.

Systems 63

Systems Cache Website Network 63