Percona

JUNE 22, 2023

A monitoring tool like Percona Monitoring and Management (PMM) is a popular choice among open source options for effectively monitoring MySQL performance. This includes metrics such as query execution time, the number of queries executed per second, and the utilization of query cache and adaptive hash index.

Performance 102

Performance Monitoring Traffic Database 102

Brendan Gregg

FEBRUARY 28, 2023

My personal opinion is that I don't see a widespread need for more capacity given horizontal scaling and servers that can already exceed 1 Tbyte of DRAM; bandwidth is also helpful, but I'd be concerned about the increased latency for adding a hop to more memory. Ford, et al., “TCP

Performance 52

Performance Latency Cache Virtualization 52

Brendan Gregg

JULY 2, 2021

opensnoop Files opened table. biolatency Disk I/O latency histogram heat map. cachestat File system cache statistics line charts. runqlat CPU scheduler latency heat map. execsnoop New processes (via exec(2)) table. ext4slower Slow filesystem I/O table. biosnoop Disk I/O per-event details table, offset heat map.

Latency 145

Latency Cache Energy Systems 145

Brendan Gregg

AUGUST 18, 2019

bpftrace is a new open source tracer for Linux for analyzing production performance problems and troubleshooting software. For example, iostat(1), or a monitoring agent, may tell you your average disk latency, but not the distribution of this latency. Block I/O latency as a histogram. 1 /* 2 * biolatency.bt

Latency 68

Latency C++ Cache Programming 68

Scalegrid

MARCH 28, 2024

Key Takeaways Redis offers complex data structures and additional features for versatile data handling, while Memcached excels in simplicity with a fast, multi-threaded architecture for basic caching needs. Redis is better suited for complex data models, and Memcached is better suited for high-throughput, string-based caching scenarios.

Cache 130

Cache Storage Scalability Architecture 130

The Morning Paper

FEBRUARY 23, 2020

Caching of query results on the other hand, looks like a good business model, at large enough scale these might amount to pretty much the same thing). How’s that going to work given what we know about the throughput and latency of blockchains, and the associated mining costs?" An embodiment for structured data for IoT.

Blockchain 94

Blockchain Internet Internet IoT 94

CSS - Tricks

JULY 25, 2019

Cache-Headers missing? Lighthouse is an open source project run by a dedicated team from Google Chrome. Estimated Input Latency. Estimated Input Latency. Service workers that will cache the bytecode result of a parsed and compiled script. After that, it’ll be mitigated by cache. Speed Index.

Google 71

Google Engineering Speed Mobile 71

The Morning Paper

MARCH 10, 2020

The tracing, replay, and analysis tools developed for this work are released in open source as part of the latest RocksDB release , and the new benchmark is now part of the db_bench benchmarking tool. All cache read misses and all writes go through UDB servers, with SQL queries being converted into RocksDB queries.

Benchmarking 59

Benchmarking Storage Cache Open Source 59

Brendan Gregg

JULY 2, 2021

If you're using an open source monitoring platform, first check if it already has a BPF agent. opensnoop Files opened table 3. biolatency Disk I/O latency histogram heat map 5. cachestat File system cache statistics line charts 7. runqlat CPU scheduler latency heat map 10.

Open Source 40

Open Source Latency Cache Energy 40

The Morning Paper

NOVEMBER 5, 2019

Ceph is a widely-used, open-source distributed file system that followed this convention [of building on top of a local file system] for a decade. To avoid any consistency overheads on object writes it writes data directly to raw disk , so there is only one cache flush fora data write. Taking it to the next level.

Storage 64

Storage Systems Hardware Efficiency 64

Dynatrace

MAY 13, 2022

Apache Cassandra is an open-source, distributed, NoSQL database. With the Dynatrace Data Explorer, you can easily analyze metrics, such as client read/write latency by Cassandra nodes and disk space usage by keyspaces. You can also analyze table metrics, such as cache hits and misses.

Azure 236

Azure Latency Metrics Infrastructure 236

The Symphonia

MAY 22, 2018

I was a little restricted in my thinking the first time around and I’ve come to see FaaS as something not quite stateless, since caching state in a Lambda instance that might stick around for 5 hours is a perfectly reasonable idea. I also rewrote the section on Startup Latency since Cold Starts are one of the big “FUD” areas of Serverless.

Serverless 40

Serverless Architecture Lambda Azure 40

The Morning Paper

MAY 12, 2019

An open-source benchmark suite for microservices and their hardware-software implications for cloud & edge systems Gan et al., It’s a pretty impressive effort to pull together and make available in open source (not yet available as I write this) such a suite, and I’m sure explains much of the long list of 24 authors on this paper.

Open Source 61

Open Source Hardware Benchmarking Systems 61

Percona

JULY 17, 2023

Not really open source : Even the MongoDB Community version is not open source; it’s source-available and is under the SSPL license (introduced by MongoDB itself). Organizations have access to the source code, allowing them to make changes and enhancements as needed. Couchbase — No.

Open Source 74

Open Source Database Scalability Software 74

Smashing Magazine

AUGUST 3, 2023

For Performance Monitoring Many of you reading this may already be familiar with Next.js, but it is a popular open-source JavaScript framework that allows us to monitor our website’s performance in real-time. It also opens up the possibility for more effective use of caching strategies, potentially enhancing load times further.

Performance 74

Performance Cache Traffic Metrics 74

Percona

APRIL 7, 2023

Here’s how the same test performed when running Percona Distribution for PostgreSQL 14 on these same servers: Queries: reads Queries: writes Queries: other Queries: total Transactions Latency (95th) MySQL (A) 1584986 1645000 245322 3475308 122277 20137.61 MySQL (B) 2517529 2610323 389048 5516900 194140 11523.48

Tuning 133

Tuning Cache Servers Benchmarking 133

The Netflix TechBlog

JULY 12, 2019

The Tech Hollow , an OSS technology we released a few years ago, has been best described as a total high-density near cache : Total : The entire dataset is cached on each node?—?there there is no eviction policy, and there are no cache misses. Near : the cache exists in RAM on any instance which requires access to the dataset.

Cache 183

Cache Architecture Latency Engineering 183

Percona

MARCH 23, 2023

By caching hot datasets, indexes, and ongoing changes, InnoDB can provide faster response times and utilize disk IO in a much more optimal way. Factors that can affect the amount of RAM needed by a database server include the total size of the database, the number of concurrent users, and the complexity of the database queries.

Performance 123

Performance Hardware Tuning Storage 123

All Things Distributed

NOVEMBER 21, 2017

Redis's microsecond latency has made it a de facto choice for caching. Four years ago, as part of our AWS fast data journey, we introduced Amazon ElastiCache for Redis , a fully managed, in-memory data store that operates at microsecond latency. TB of in-memory capacity in a single cluster. Atomic slot migration.

Games 113

Games Retail Latency Education 113

The Morning Paper

OCTOBER 26, 2020

It’s limited by the laws of physics in terms of end-to-end latency. The emergence of edge computing has raised new challenges for big data systems… In recent years a number of distributed streaming systems have been built via either open source or industry effort (e.g. Emphasis mine ). Emphasis mine ).

Cloud 104

Cloud Big Data Latency Architecture 104

The Netflix TechBlog

DECEMBER 17, 2019

Therefore, dumps are needed to capture the full state of a source. There are several open source CDC projects, often using the same underlying libraries, database APIs, and protocols. We want to support these systems as a source so that they can provide their data for further consumption.

Database 197

Database Traffic Transportation Open Source 197

The Netflix TechBlog

DECEMBER 17, 2019

Therefore, dumps are needed to capture the full state of a source. There are several open source CDC projects, often using the same underlying libraries, database APIs, and protocols. We want to support these systems as a source so that they can provide their data for further consumption.

Database 212

Database Traffic Transportation Open Source 212

Smashing Magazine

AUGUST 20, 2021

It was a battle of not only proprietary vs open source but also static vs dynamic. You could create and update blog posts, all content was straight HTML — open-source WYSIWYG editors weren’t available at the time, and Markdown didn’t come about until 2004. We can see all the bones of modern Jamstack CMSs here.

Ecommerce 139

Ecommerce Website Government Internet 139

All Things Distributed

OCTOBER 12, 2016

Three years ago, as part of our AWS Fast Data journey we introduced Amazon ElastiCache for Redis , a fully managed in-memory data store that operates at sub-millisecond latency. While caching continues to be a dominant use of ElastiCache for Redis, we see customers increasingly use it as an in-memory NoSQL database.

Scalability 131

Scalability Analytics Cache AWS 131

Abhishek Tiwari

NOVEMBER 3, 2018

Cost is one of the key reasons why most government organisations, mid to large sized business, and publisher prefer open source CMS options such as WordPress and Drupal. In addition, open source CMS solutions also struggle with blotted plugin ecosystem. Eventually, we decided to move them to Jekyll.

Systems 63

Systems Cache Website Network 63

Percona

MAY 2, 2023

Also, we will take a look at our open-source backup utility custom-built to help avoid costs and proprietary software – Percona Backup for MongoDB or PBM. We will be discussing these two backup options, how to proceed with them, and which one suits better depending on requirements and environment setup.

Best Practices 52

Best Practices Database Storage Servers 52

Percona

APRIL 17, 2023

The CFQ works well for many general use cases but lacks latency guarantees. The deadline excels at latency-sensitive use cases ( like databases ), and noop is closer to no schedule at all. Make sure the drives are mounted with noatime and also if the drives are behind a RAID controller with appropriate battery-backed cache.

Best Practices 52

Best Practices Design Tuning Database 52

Alex Russell

APRIL 29, 2021

Apple Corporate is at fault, not Open Source engineers or the line managers who support them. For heavily latency-sensitive use-cases like WebXR, this is a critical component in delivering a good experience. An extension to Service Workers that enables browsers to present users with cached content when offline.

Media 145

Media Games Education Engineering 145

Percona

MAY 15, 2023

In the MySQL open source ecosystem, we have only two consolidated ways to perform sharding — Vitess and ProxySQL. One example could be using an RDBMS for most of the Online transaction processing ( OLTP) data shared by country and having the products as distributed memory cache with a different technology.

Traffic 121

Traffic Scalability Database Servers 121

Enprowess

SEPTEMBER 7, 2021

is a server-side, open-source, JavaScript runtime environment that allows developers to write JavaScript on the client and the server-side. Open-source: Large ecosystem for the open-source library. is a JavaScript-based free and open-source framework. supports an open-source community.

Open Source 52

Open Source Virtualization Programming Servers 52

Smashing Magazine

AUGUST 22, 2021

Because we are dealing with network protocols here, we will mainly look at network aspects, of which two are most important: latency and bandwidth. Latency can be roughly defined as the time it takes to send a packet from point A (say, the client) to point B (the server). Two-way latency is often called round-trip time (RTT).

Performance 105

Performance Network Latency Servers 105

Smashing Magazine

SEPTEMBER 6, 2021

This approach was touted to be better for fine-grained caching because each subresource could be cached individually and the full bundle didn’t need to be redownloaded if one of them changed. Finally, not inlining resources has an added latency cost because the file needs to be requested. Large preview ).

Network 104

Network Servers Cache Traffic 104

Smashing Magazine

JANUARY 11, 2021

Build Optimizations JavaScript modules, module/nomodule pattern, tree-shaking, code-splitting, scope-hoisting, Webpack, differential serving, web worker, WebAssembly, JavaScript bundles, React, SPA, partial hydration, import on interaction, 3rd-parties, cache. There are many tools allowing you to achieve that: SiteSpeed.io Large preview ).

Performance 145

Performance Cache Media Metrics 145

Smashing Magazine

JANUARY 6, 2020

dashboard (open source), SpeedCurve and Calibre are just a few of them, and you can find more tools on perf.rocks. Estimated Input Latency tells us if we are hitting that threshold, and ideally, it should be below 50ms. Large preview ). There are many tools allowing you to achieve that: SiteSpeed.io

Performance 145

Performance Cache Network Metrics 145

Smashing Magazine

JANUARY 7, 2019

dashboard (open source), SpeedCurve and Calibre are just a few of them, and you can find more tools on perf.rocks. Estimated Input Latency tells us if we are hitting that threshold, and ideally, it should be below 50ms. There are many tools allowing you to achieve that: SiteSpeed.io Assets Optimizations.

Performance 103

Performance Cache Metrics Network 103