Brendan Gregg

MAY 8, 2021

It seemed to have several set speeds, and when pushing hard it would try a faster speed for a couple of seconds, then a faster one, until it found the fastest it could operate (presumably it tries faster speeds until it begins to get sector-ECC errors). The latencies here look like they are a mix of normal speed (~1.9

Performance 142

Performance Latency Speed Systems 142

Percona

OCTOBER 2, 2023

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 33-generic Architecture | CPU = 64-bit, OS = 64-bit Threading | NPTL 2.35

Cache 101

Cache Database Virtualization Servers 101

Testsigma

AUGUST 12, 2021

Some of the other crucial reasons for us to test our web app are security, speed, and we’ve got to constantly update it to ensure it’s responsive across older devices and browsers. On BrowserStack, we can also choose a resolution that we’d like to test on, for instance, 800×600 to 2048×1536. Source: StatCounter.

Testing 102

Testing Testing Tools Mobile Cloud 102

Percona

AUGUST 29, 2018

cat /proc/meminfo | grep -i huge AnonHugePages: 0 kB ShmemHugePages: 0 kB HugePages_Total: 88 HugePages_Free: 88 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB Now set the parameter huge_pages “on” in $PGDATA/postgresql.conf and restart the server. $

Tuning 57

Tuning Database Servers Processing 57

Brendan Gregg

MAY 8, 2021

It seemed to have several set speeds, and when pushing hard it would try a faster speed for a couple of seconds, then a faster one, until it found the fastest it could operate (presumably it tries faster speeds until it begins to get sector-ECC errors). The latencies here look like they are a mix of normal speed (~1.9

Performance 40

Performance Latency Speed Systems 40

Brendan Gregg

MAY 8, 2021

It seemed to have several set speeds, and when pushing hard it would try a faster speed for a couple of seconds, then a faster one, until it found the fastest it could operate (presumably it tries faster speeds until it begins to get sector-ECC errors). The latencies here look like they are a mix of normal speed (~1.9

Performance 40

Performance Latency Speed Systems 40

Percona

AUGUST 29, 2023

Columnar storage of tables can compress data, speeding up scans and supporting fast projections, both on regular and distributed tables. The distributed query engine can route and parallelize SELECT, DML, and other operations on distributed tables across the cluster. citus_columnar | 11.1-1 1 citus | 11.1-1 citus_columnar | 11.1-1

C++ 81

C++ Database Storage Testing 81