Brendan Gregg

SEPTEMBER 5, 2021

(The other colors are yellow for C++, and red for other user-level code.) The ZFS Adapative Replacement Cache (ARC) is the main memory cache for the file system. The default size is 128 Kbytes, and people shouldn't be tuning below 8 Kbytes. The ARC contains lists of cached buffers for different memory types.

Cache 40

Cache Cloud Java Tuning 40

The Netflix TechBlog

OCTOBER 18, 2019

a) Standardized Logging from the treatment services, b) Real-time stream processing over Apache Flink for member activity joins, and c) an Apache Spark client for attribution and reward computation. In particular, he talked about the misattribution potential in a complex microservice architecture where often intermediary results are cached.

Infrastructure 126

Infrastructure Metrics Architecture Efficiency 126

The Netflix TechBlog

OCTOBER 18, 2019

a) Standardized Logging from the treatment services, b) Real-time stream processing over Apache Flink for member activity joins, and c) an Apache Spark client for attribution and reward computation. In particular, he talked about the misattribution potential in a complex microservice architecture where often intermediary results are cached.

Infrastructure 100

Infrastructure Metrics Architecture Efficiency 100

The Netflix TechBlog

JULY 1, 2019

In a previous post , we described how our TV application consists of a C++ SDK installed natively on the device, an updatable JavaScript user interface (UI) layer, and a custom rendering layer known as Gibbon. Our UI runs on top of a custom rendering engine which uses what we call a “surface cache” to optimize our use of graphics memory.

Cache 166

Cache Design Testing Development 166

Brendan Gregg

FEBRUARY 9, 2018

In this post I'll look at the Linux kernel page table isolation (KPTI) patches that workaround Meltdown: what overheads to expect, and ways to tune them. Cache Access Pattern Depending on the memory access pattern and working set size, an additional 1% to 10% overhead can occur at a certain syscall rate. and 4.14.12

Performance 75

Performance Benchmarking Cache Tuning 75

Brendan Gregg

FEBRUARY 8, 2018

In this post I'll look at the Linux kernel page table isolation (KPTI) patches that workaround Meltdown: what overheads to expect, and ways to tune them. Cache Access Pattern Depending on the memory access pattern and working set size, an additional 1% to 10% overhead can occur at a certain syscall rate. and 4.14.12

Performance 40

Performance Benchmarking Cache Tuning 40

HammerDB

NOVEMBER 5, 2018

If you are new to running Oracle, SQL Server, MySQL and PostgreSQL TPC-C workloads with HammerDB and have needed to investigate I/O performance the chances are that you have experienced waits on writing to the Redo, Transaction Log or WAL depending on the database you are testing. A good example of how tuning is an iterative process.

Benchmarking 40

Benchmarking Database C++ Virtualization 40

Percona

JANUARY 17, 2019

Aurora Parallel Query response time (for queries which can not use indexes) can be 5x-10x better compared to the non-parallel fully cached operations. The second and third run used the cached data. It does not use any cache (ie: innodb buffer pool) either. This query is 100% cached. Test data and versions.

Cache 46

Cache C++ AWS Airlines 46

Smashing Magazine

AUGUST 9, 2021

However, many other devices are sitting between the client and the server that also have their own TCP code on board (examples include firewalls, load balancers, routers, caching servers, proxies, etc.). For example, if we have files A, B, and C, we would have three TCP connections. For HTTP/1.1, Large preview ).

Transportation 145

Transportation Internet Internet Network 145

Smashing Magazine

JUNE 26, 2020

As the letter d is used for two adjacent areas, the item placed using that letter will occupy both: body { grid-template-areas: "a b c" "d d e" "f g h"; }. CSS transforms are ideal tools for fine-tuning the size and position of elements within grids’ constraints. They’re also useful for adding unusual touches to a design.

Design 95

Design Media C++ Energy 95

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. As such, a micro-optimization is, again, how you probably need to fine-tune things on a low level to really benefit from it.

Network 105

Network Servers Cache Traffic 105

Smashing Magazine

AUGUST 22, 2021

As such, tuning congestion logic is usually only done by a select few developers, and evolution is slow. Some examples of the latter are heavily cached websites, as well as single-page apps that periodically fetch small updates via APIs and other protocols such as DNS-over-QUIC. This multiplexing can happen in many different ways.

Performance 106

Performance Network Latency Servers 106

SQL Server According to Bob

JANUARY 11, 2020

Character POS ASCII Value Formula Value A 1 65 67 C 2 67 69 Checksum 136 Comparing ​​ the checksum values indicates ​​ that the values do not match and ​​ damage ​​ has occurred to the data.

Servers 40

Servers Cache Database Media 40

High Scalability

NOVEMBER 25, 2019

Edge caching. In general, Egnyte connect architecture shards and caches data at different levels based on: Amount of data. Nginx for disk based caching. We use different types of caching techniques depending on the problem statements. Disk based caching. Hybrid Sync. On prem data processing. Offline access.

Architecture 52

Architecture Cache Azure Storage 52