Questions tagged [performance]
Questions about server hardware and software performance, or network performance.
3,186
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Server's Disk Queue Length is high, but Disk Bytes/sec is lower than it's capable of
I have an environment running SQL Server on a Windows VMWare platform using a SAN with SSDs set up in RAID 6, and using Veeam for server backups and LiteSpeed for SQL Server backups.
I've had a ...
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45
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Linux Server is slow on running some commands
I have a Linux server and ubuntu 20.04 is installed on it. Kernel version is 5.4.0-163-generic. 24 cores and 32GB RAM.
I have database running on this server which is working without any issue. ...
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25
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Pin point performance issue in the past
I experienced a decrease of performance on my server and I was wondering if there is a possibility to lookback in time on a rhel8 machine. Where I can pinpoint which process claimed a lot of resources ...
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33
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command took very much longer to run from script than in CLI
In an AWS EC2 serverm, OS: amzn2-ami-kernel-5.10 x86_64
Trying to diagnose an issue of a slow running cron script, identified a single line of command that took more than an hour to run, everyday.
...
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2
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40
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Slowdown in Apache with HTTP/2 when Requesting Small Thumbnails (60KB) via Reverse Proxy to HTTP/1.1 Backend
I am currently running an Apache server with HTTP/2 enabled as a reverse proxy for my web application. I have noticed a significant slowdown when requesting a large number of small thumbnails (each ...
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1
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55
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Disk saturated by mariadb on CentOS 7, blocks everything
For the past few days I have been having a problem with a webserver running CentOS 7. Every 13-14 minutes some operation (which I identified with mariadb using iostat) seems to completely saturate the ...
3
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58
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Reading from software RAID in parallel is slower than it "should" be, given other benchmarks
Note:
I have seen some somewhat similar questions here, but:
none of them concern reading many files in parallel, and
most are 10+ years old and concern no-longer-relevant hardware and kernel ...
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128
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Mellanox ConnectX-7 - Unable to get more than 250 Gbit/s
I have several machines with ConnectX-7 Infiniband cards and they're plugged into an Nvidia QM9700 switch. I've confirmed 400 Gbit NDR at both ends (ibstat on the host and in the console on the ...
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46
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Inconsistent Clickhouse database query performance
Folks,
Clickhouse Server version: 22.8.21 (have tried a variety of 22.x and 23.x versions as supported by clickhouse-backup to restore my data with for testing, none seemed to improve the query ...
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92
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Does reverse proxying the WebSockets servers make sense from scaling perspective?
I have reverse proxy and multiple WebSocket servers behind it. I'm confused whether it makes any sense from scaling perspective, because I see it like that:
The WebSocket server A has 30,000 active ...
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31
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What happens on the server when a multimedia file gets downloading/playing?
I have a video-based website. It gets slow when about 1k concurrent users watch/download a video.
I'm trying to debug it to see what resource is weak to increase it. I executed htop command to see ...
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3
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857
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Unexpected poor performance with NVMe drives on an X9DR3-F
I am experiencing what seems like uncharacteristically low performance from an NVMe SSD stripe in a server. The hardware is as follows:
Motherboard: X9DR3-F
CPU: Dual E5-2650v2
RAM: 128GB DDR3-1333 ...
- 379
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1
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26
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SAS channel speed and multiple disk setup
I have the following setup and looking for recommendations on the 2 connection options:
1x SAS Controller in HBA mode with 2x SAS Ports
2 SAS cables with 4 SAS connectors each
4x HDs with 6GB/s SAS ...
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71
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Http outperformed Http2 ,why, please help me to figure out?
I'm currently conducting performance testing on my NGINX web server container and I'm encountering some unexpected results. My tests show that HTTP performance is outperforming HTTP/2, despite SSL and ...
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61
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How to determine nginx/HTTPS encryption is my bottleneck?
I'm using a Digital Ocean droplet (like an EC2 host), it's Ubuntu 22.10, and running a node.js application. However, and this may be a bad idea, I'm running nginx on the same host and the application ...
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116
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Why MACsec can not reach more than 2Gbits/s?
i am configuring macsec and i have discovered that, when using this protocol to send/received data, the bitrate is so low.
I am using it over a 10Gb network adaptor, using iperf3 it almost reach that ...
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99
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Apache creates ~3x as many threads as MaxRequestWorkers
I'm hosting a non-profit community wiki for the upcoming video game Baldur's Gate 3. Since it looks like the game is likely to have millions of players, we started worrying about server capacity.
I'm ...
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2
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574
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Test network transfer speeds with rsync from a server with limited storage
I want to test transfer speeds from server A to server B, but server A has limited disk space (<50GB) and because the network speeds are fast within the same data center, transferring 50 GB may be ...
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59
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How to figure out what makes a Linux workstation slow?
We have this ThinkPad X240, 8GiB of RAM, an i5 4300U, and a Toshiba SATA SSD. The machine is running Linux Mint 20.3.
The user complains that it is very slow. Mostly when the browser is open and ...
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1
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3k
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Understanding EBSByteBalance% in AWS RDS gp3 volumes
I am troubleshooting an AWS RDS Postgres instance that has been restarted by AWS several times in the last few days, very likely due to resource constraints. It's a testing DB that usually doesn't do ...
- 513
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76
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Performance for static files (HTML, CSS and JS) of PHP Server - CDN vs NGINX
Without going too much into detail to avoid that this question becomes opinion-based; so talking from a purely technical perspective: When you currently have a PHP-Apache setup, both PHP and Apache ...
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33
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Is there a system/computational overhead when using AccuracySec=1s in systemd timers
systemd timers by default have 1 minute accuracy, however it is easy to change that with AccuracySec parameter in the timer definition.
I can't find any information related to whether setting accuracy ...
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206
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LVM Thin pool performance with NVMe
I have 24 Samsung PM1733 7.68 TB and a server platform Gigabyte R282-Z94 with 2x 7702 64cores AMD EPYC. OS: Oracle Linux 8.6, 5.4.17-2136.311.6.el8uek.x86_64
I need this server for testing so I have ...
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2
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116
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Prefetched Small File Cache
First, my use case: On my Linux-based server I am getting unsatisfactory disk IO performance for small files, and am limited to the approximately 100 IOPS that a 7200rpm HDD will support. This is of ...
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2
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401
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nginx and php-fpm waiting for server too long
I am using docker to mount nginx and a PHP-FPM using Phalcon Framework and React as the front end
`upstream fastcgi_backend {
server bfy-%APP_VERSION_UID%_buildify-php-fpm_1:90%FPM_PORT_PREFIX%;
}
...
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answers
71
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performance issue when linux(ubuntu) work as router with ip_forwarding enable
I'm running a test with this topo: tester---(port1)ubuntu_linux(port2)----tester. I enabled ip_forwarding in ubuntu_linux by : echo 1 > /proc/sys/net/ipv4/ip_forward
The tester is trying to find ...
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470
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MAMP Websites taking more than 20-25 secs to load, but sometimes
I'm using MAMP Pro on my Mac (Monterrey) and since a couple weeks I've been having a strange problem. After several tests I've been unable to find out where the problem is, but this is what happens.
...
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91
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CentOS getting unusable slow over time running at Hyper-V
I run TWiki 6.1 on a CentOS Stream 9-virtual machine hosted in Hyper-V at Windows10. VMs hostanme is "twiki"
System ran for over a year now without any problems but since some weeks its not ...
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100
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Slow MySQL 5.7 on Windows Server 2019
MySQL 5.7 standard install with standard my.cnf (server) one table 20mb size
Dell R210II Windows Server 2019 Xeon 1230 v2 16gb ram
1 queries executed, 1 success, 0 errors, 0 warnings
Query: CALL ...
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1
answer
530
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Determine QEMU KVM overhead?
My guest OS shows about 5 percent CPU usage, but my host machine shows the QEMU process taking about 25 percent.
I'm trying to understand where this difference comes from, as I am using KVM ...
- 265
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2
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971
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Windows File server heavy cpu usage - Render Farm with many clients reading data at once
I have a windows file sever with Dual Xeon E5-2650v4 cpus. They are 14 core each so 28 cores total.
The network interface is a Mellanox Connectx3 40gbs.
The disk drives in the server are 7.68TB Sata ...
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108
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Slow server performance due to Google Bot and Ahrefs Bot
I have a VPS server with 64 CPU cores and 128 GB RAM running on Debian. I have noticed that Google Bot from IP address 66.249.66.0/24 and Ahrefs Bot from IP addresses 54.36.148.0/24 and 54.36.149.0/24 ...
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270
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PHP-fpm consuming most memory
My Memory and swap memory is being used mostly by php-fpm which results in slow response from server. below is the output of top command. Kindly suggest
Also my php-fpm conf file settings are as ...
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29
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Why does boot time and workload performance degrade after launching a large number of T2 instances on AWS?
I'm running a swarm of T2 instances on AWS, each with an average lifespan of 5 minutes. I start an instance, do some workload, and then terminate it. I'm using my own AMI on a GP2 volume.
After ...
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43
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Connect to a remote video feed over Internet
I need to connect to a remote video feed over the Internet.
The camera system has a http interface that is normally accessed through a LAN where you've hooked up both the camera and a laptop to the ...
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69
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iometer does not display raw partition
I'm trying to test the performance of my external USB drive. I have two partitions on it. One is formatted as exFAT whereas the other is a RAW windows partition.
I am at a loss about using IOMeter to ...
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250
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Workday integration task failed
I am trying to run a studio integration that was built in the past - so don't have access to the studio files etc. On running the integration - the following error is encountered.
"Integration ...
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296
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Interpret Iperf3 results for bidirectional UDP Test
I am trying to make sense of the raw logs of an iperf3 UDP bidIrectional test.
Here are the iperf3 client logs:
[ ID][Role] Interval Transfer Bitrate Jitter Lost/Total ...
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49
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Does Laravel tend to be much more slower than Node JS?
Does Laravel tend to be much more slower than Node JS? Or is it just me that doesn't know that Laravel have certain limiter or anything when runs in local machine (even though using production ...
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206
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Poor server performance on Linux Ubuntu 20.04 with PHP-FPM, MySQL, and Redis Server installed
My client’s server has recently started having performance issues. The single website hosted on the server loads very slowly. It is built with WordPress using a custom theme. There are a minimum ...
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83
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Nginx performance issues
I made a website using React and connected to Strapi. But I need to keep some background videos mainly on the home page.
The main banner has 4 videos and the background of the page is also a video.
...
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2
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286
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Will disk compression impact the performance of a MySQL database?
I've recently setup a TrueNAS storage server and hosted on it is a MySQL database. It's about 3GB; I'm not too concerned with how much space it's utilising.
By default, TrueNAS enables LZ4 compression ...
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144
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NPS4 on a Threadripper 3960x gives two nodes with no memory at all
I set my 3960x to NPS4 (Nodes Per Socket: 4) mode to experiment with NUMA on Linux. My system has 4 32 GiB DIMMs across 4 channels, so I expected each of the 4 nodes to get one. Instead, nodes 1 &...
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1k
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Ceph reading and writing performance problems, fast reading and slow writing
Ceph reading and writing performance problems, fast reading and slow writing
Hello, we need to migrate all cloud environments to Proxmox. At present, I am evaluating and testing Proxmox+Ceph+OpenStack....
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50
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Lower throughput in a Bridge created as a Ethernet Switch in a Ubuntu Server -
The setup is given below. I have a server with NIC(eth0 and eth1). I have created a bridge br0. The idea is I want to send the packets received from eth0 via br0 to eth1.
(Laptop)__________Ubuntu ...
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51
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What is the Max value for speed limit param in CloudLinux (lve)?
I can see in cloudLinux document that in cpu usage limit section, 150% means 1.5 cores : https://docs.cloudlinux.com/limits/#speed-limit
My question is : for a server with 12 cores, if I want to use ...
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18
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Performance of SMB connections outside of the domain context
we've got a Samba Domaincontroller running on Ubuntu Server. There is multiple workstations accessing different Shares. There is one Server outside of the Domain which provides a share for Database ...
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914
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How to automatically kill a Kubernetes pod that uses too much CPU?
I administrate kubernetes clusters running software that is not always perfect. Some have memory leaks, some have cpu leaks, some have both.
I would like to automatically kill the leaking pods. The ...
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1
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114
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Discovering the speed of data transfer between my server and another server that I don't have access to [closed]
What solution do you have so that I can get the speed of downloading from a server or uploading to a server on the TCP or UDP protocol, which I do not have access to that server? but I have root ...
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382
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Disk performance issues exclusively with RAID 10 (LVM RAID)
For some reason, I am suffering very poor disk performance on RAID 10, but normal performance on RAID 5.
For context, I have 4 x 1 TB hard drives in a server. They are the physical volumes within the ...
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