DZone

OCTOBER 9, 2023

Bloom filters are probabilistic data structures that allow for efficient testing of an element's membership in a set. Bloom, these data structures have found applications in various fields such as databases, caching, networking, and more. Since their invention in 1970 by Burton H.

Efficiency 152

Efficiency Cache Network Database 152

ACM Sigarch

DECEMBER 19, 2022

We assume a base multi-core processor four-way-issue load/store machine with 64-bit integer/address registers Rx, 128-bit (16-byte) data registers Vx, and an L1 D-cache that can do two operations per cycle, each reading or writing an aligned 16-byte memory word. Cache pollution is addressed in a section below.). Cache Underpinning.

Design 145

Design Systems Cache Network 145

CSS Wizardry

SEPTEMBER 6, 2022

Honestly, in this scenario, my advice is almost always: don’t bother trying to retrofit Critical CSS—just hash-n-cache 1 2 the living daylights out of your existing CSS bundles until you replatform and do it differently next time. In a reduced test case like this, it’s blindingly obvious that Critical CSS is a wasted effort.

Media 351

Media Cache Network Website 351

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 The throughput didn’t double but increased by 57%.

Tuning 135

Tuning Cache Servers Benchmarking 135

Dynatrace

APRIL 10, 2023

” Uninterrupted testing and multicloud observability Cluster monitoring also helped the company avoid performance issues during the A/B testing it conducted to evaluate the user experience. Such testing is critical to identifying customer shopping patterns that inform decisions about application design and user experience. .

Cloud 171

Cloud Ecommerce Performance Retail 171

Dynatrace

JANUARY 16, 2023

Of the organizations in the Kubernetes survey, 71% run databases and caches in Kubernetes, representing a +48% year-over-year increase. Together with messaging systems (+36% growth), organizations are increasingly using databases and caches to persist application workload states.

Open Source 343

Open Source Java Operating System Programming 343

Dynatrace

JANUARY 23, 2023

These include improving API traffic management and caching mechanisms to reduce server and network load, optimizing database queries, and adding additional compute resources, just to name some. While some of these are already done, such as adding additional compute, others require more development and testing.

Social Media 130

Social Media Cache Traffic Media 130

CSS Wizardry

MAY 31, 2019

Users might already have the file cached. If website-a.com links to [link] , and a user goes from there to website-b.com who also links to [link] , then the user will already have that file in their cache. Penalty: Caching. This makes it very safe and sensible to enforce a reasonably aggressive cache policy. to just 3.6s.

Cache 274

Cache Latency Infrastructure Website 274

Percona

OCTOBER 2, 2023

Caches | 12.4G 2004l# Percona Toolkit System Summary Report ###################### Date | 2023-09-25 14:43:34 UTC (local TZ: CDT -0500) Hostname | testbox Uptime | 44 min, 1 user, load average: 0.47, 0.67, 0.57 Platform | Linux Release | Ubuntu 22.04.3 LTS (jammy) Kernel | 6.2.0-33-generic virtual = 2.2G Shared | 475.0M Buffers | 3.8G

Cache 101

Cache Database Virtualization Servers 101

The Netflix TechBlog

MAY 4, 2023

This blog post will provide a detailed analysis of replay traffic testing, a versatile technique we have applied in the preliminary validation phase for multiple migration initiatives. In this testing strategy, we execute a copy (replay) of production traffic against a system’s existing and new versions to perform relevant validations.

Traffic 339

Traffic Latency Tuning Systems 339

Percona

MARCH 27, 2023

A lot of useful information can be retrieved from this schema, for example, table metadata and foreign key relations, but trying to query I_S can induce performance degradation if your server is under heavy load, as shown in the following example test. The same tests have been executed in Percona Server for MySQL 5.7

Cache 104

Cache Hardware Servers Benchmarking 104

Brendan Gregg

MARCH 16, 2024

Only in extreme circumstances does the cost (in processor time and I-cache footprint) translate to a tangible benefit - circumstances which usually resort to hand-coded assembly anyway. It shouldn't be 10%, unless it's cache effects. And for leaf routines (which never establish a frame), this is a non-issue.

Java 145

Java Cache Google Hardware 145

High Scalability

FEBRUARY 17, 2021

This article is to simply report the YCSB bench test results in detail for five NoSQL databases namely Redis, MongoDB, Couchbase, Yugabyte and BangDB and compare the result side by side. I have also used the default six test scenarios as defined by the YCSB framework. I have restricted it to 10M records for each test.

Benchmarking 308

Benchmarking Latency C++ Database 308

Scalegrid

MARCH 23, 2020

Once authentication succeeds, it checks if it already has a cached connection for this database+user combination. Once the client disconnects, Pgpool-II has to decide whether to cache the connection: If it has an empty slot, it caches it. If it does, it returns the connection to the client. Stay tuned!

Cache 264

Cache Servers Architecture Processing 264

Dynatrace

JANUARY 5, 2023

To prevent such a significant service disruption from happening again, we are taking several immediate and mid-term actions in addition to the existing rigorous automated testing process: Improve architectural design to eliminate SSO bottleneck risk.

Cache 198

Cache Monitoring Strategy Speed 198

Testsigma

JUNE 3, 2021

These are the errors that also need attention during the testing phase. We can divide the errors during software development into two sections for easy understanding: Software errors Testing errors. These errors are caught during software documentation testing. Testing errors. Software errors. User interface errors.

Software 82

Software Software Testing Hardware 82

The Netflix TechBlog

SEPTEMBER 8, 2020

This allows the app to query a list of “paths” in each HTTP request, and get specially formatted JSON (jsonGraph) that we use to cache the data and hydrate the UI. For the migration, testing was a first-class citizen. Replay Testing Enter replay testing.

Latency 233

Latency Cache Java Traffic 233

Speed Curve

JUNE 4, 2023

You may already know that SpeedCurve lets you test multiple URLs for a site across a wide selection of browsers , devices , connection types , and geolocations. You may also know that SpeedCurve lets you add synthetic scripts to your test settings , which lets you easily do things like simulate a repeat view or block a third party.

Testing 52

Testing Cache Metrics Processing 52

The Morning Paper

SEPTEMBER 24, 2020

Static analysis of Java enterprise applications: frameworks and caches, the elephants in the room , Antoniadis et al., This means for example that it can be applied to analyse source code repositories and pull requests, be used as an additional test in CI pipelines, and even give assistance in your IDE if it’s fast enough.

Java 80

Java Cache Benchmarking Programming 80

Percona

SEPTEMBER 1, 2023

Testing and Validation : Thorough testing and validation are essential when working with triggers, especially in a production environment. Changes to triggers should be carefully reviewed and tested to ensure they do not introduce unintended consequences. for i in `seq 1 1 16`; do mysql test -e "SELECT * FROM tc_test"; done.

Cache 60

Cache Database Games Healthcare 60

Dynatrace

SEPTEMBER 2, 2020

Now the application is running, let’s test it! This is what I get on my console since I have DEBUG logging enabled: And this is our service flow: And the PurePath: We can see that once the request comes in it: Gets passed to the SubredditAnalysisDetailedView (This view attempts to get the information from Redis (the cache).

Monitoring 244

Monitoring Cache Open Source Database 244

Percona

APRIL 6, 2023

Query caching Pgpool-II can cache frequently used queries in memory, reducing the load on your PostgreSQL servers and improving response times. This means that when a query is executed, pgpool-II can check the cache first to see if the results are already available rather than sending the query to the database server.

Cache 115

Cache Open Source Benchmarking Database 115

ScaleOut Software

MAY 15, 2014

Given all this, we thought it would be a good opportunity to see how we are doing relative to the competition, and in particular, relative to Microsoft’s AppFabric caching for Windows on-premise servers. Testing Scale-Up Performance. So our comments will be confined to what testing we felt was valuable and how well SOSS performed.

Cache 40

Cache Servers Network Design 40

The Netflix TechBlog

JUNE 4, 2019

Because microprocessors are so fast, computer architecture design has evolved towards adding various levels of caching between compute units and the main memory, in order to hide the latency of bringing the bits to the brains. CFS is widely used and therefore well tested and Linux machines around the world run with reasonable performance.

Cache 251

Cache Latency Airlines Logistics 251

Percona

JULY 25, 2023

After the “data dictionary” (DD) engine and DD cache are initialized on a server, the Storage Engines can ask for a table definition. Initializing a DD engine and the cache adds complexity and other server dependencies. ibd in the test directory. For example, mysql datadir/test/t1.ibd. ibd2sdi data/test/t1.ibd

Cache 85

Cache Benchmarking Servers Design 85

Percona

MAY 10, 2023

Let’s start by running a little experiment – generating heavy I/O usage on the system: sysbench --threads=8 --time=0 --max-requests=0 fileio --file-num=1 --file-total-size=10G --file-io-mode=sync --file-extra-flags=direct --file-test-mode=rndrd run CPU Usage in Percona Monitoring and Management (PMM): root@iotest:~# vmstat 10 procs --memory (..)

Cache 143

Cache Monitoring Open Source Processing 143

CSS - Tricks

APRIL 28, 2022

While CloudFront’s edge caching does offer benefits, serving your app’s resources from these multiple locations is not without a cost of its own. We’ll be changing DNS records and, depending on your web app, you may have to add some cache headers in order to prevent certain assets from ever being cached. Setting up our DNS.

Cache 79

Cache AWS Servers Traffic 79

DZone

DECEMBER 30, 2020

Below are some of the key metrics that need to be monitored during performance testing: CPU utilization. Cache hit ratio. Let's take a look at some of the causes of negative impacts on performance testing and some quick resolutions that will help smooth everything out. Heap memory utilization. Number of active/daemon threads.

Servers 133

Servers Performance Cache Performance Testing 133

Percona

NOVEMBER 1, 2023

version, like this: ANALYZE TABLE removes the table from the table definition cache, which requires a flush lock. version, like this: ANALYZE TABLE removes the table from the table definition cache, which requires a flush lock. In short, ANALYZE could lead to nasty stalls in busy production environments. addressing this problem.

Servers 98

Servers Database Cache C++ 98

Percona

APRIL 24, 2023

The more indexes, the more the requirement of memory for effective caching. Indexes need more cache than tables Due to random writes and reads, indexes need more pages to be in the cache. Cache requirements for indexes are generally much higher than associated tables. The actual impact depends on the index type.

Tuning 126

Tuning Cache Storage Database 126

Smashing Magazine

NOVEMBER 8, 2021

But then, quickly advances to contextual pricing, juggling complexity of large and frequently updated product catalog, managing continuously running multivariate tests and promotion campaigns, and serving customer-tailored dynamic recommendations. The journey, often, starts “simple” with localization. Large preview ). You need both.

Cache 135

Cache Best Practices Strategy Servers 135

Dynatrace

NOVEMBER 28, 2022

Lambda then takes a snapshot of the memory and disk state of the initialized execution environment, persists the encrypted snapshot, and caches it for low-latency access. In our internal testing of SnapStart, we noticed an improved time of 200 to 300 milliseconds in P90 when compared to Lambda On-Demand; however, your results may vary.

Lambda 225

Lambda AWS Serverless Latency 225

MachMetrics

JUNE 1, 2020

In fact, failing to run a mobile page speed test is the number 1 speed testing mistake we see our users make! We’ll show you how to run a mobile page speed test with MachMetrics.com, and how to make improvements based on your results. We encourage you to test your site out on slower connection speeds as well!

Speed 67

Speed Mobile Testing Google 67

SQL Performance

MARCH 29, 2022

Simple parameterization has a number of quirks in this area, which can result in more parameterized plans being cached than expected, or finding different results compared with the unparameterized version. Reputation = 252552 ; These statements result in six cached plans, three Adhoc and three Prepared : Different guessed types.

Cache 90

Cache Servers Database Testing 90

KeyCDN

DECEMBER 8, 2022

Many factors affect the speed of your WordPress website; some of them are: Your web host Server-side optimizations (PHP version, compression, caching, etc.) Page loading speed test Before conducting any further tests, a website owner must determine at what speed his website loads. So let's discuss the process one step at a time.

Cache 52

Cache Website Speed Website Performance 52

The Netflix TechBlog

NOVEMBER 3, 2022

We introduce a caching mechanism in the API gateway layer, allowing us to offload processing from singleton leader elected controllers without giving up strict data consistency and guarantees clients observe. The cache is kept in sync with the current leader process. How do I know that my cache is up to date? of the data.

Cache 224

Cache Latency Traffic Systems 224

IO River

NOVEMBER 2, 2023

They cache static content and enable lightning-fast delivery around the globe.This symbiosis reduces server load, boosts loading times, and ensures efficient content distribution. Content Delivery Networks (CDNs), web browsers, and proxy servers can store static files in their caches.

Cache 52

Cache Social Media Website Performance Website 52