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Questions tagged [high-load]

All aspects of high-loaded systems development and maintenance.

All aspects of high-loaded systems development and maintenance: design, algorithms, architecture, technologies, development, testing, databases, storage, support, hardware, hosting, management.

219 questions
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High load and file descriptors but idle cup usage

I have a problem with NFS & PHP. I changed the NFS mount on some of my servers using Ansible, but I forgot to change the NFS mount on this server. After 4-5 days, I saw the system load on this server at around 50 (the server has 8 cores!), but CPU…
mohammd salehi
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Very low memory usage during heavy load test

I have a wordpress website wich I did a heavy load test on. As you can see below the CPU usage is of course high but at the same time the RAM usage never goes higher than 0,4%. The load test doesn't produce any errors but the loading time of the…
deepbluecake123
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How to check what triggered high CPU usage on past days, on Digital Ocean?

I want to investigate what caused a high cpu usage for several hours on 1/16. Digital Ocean graph shows a prolonged high cpu usage in the course of about 12 hours. Is there a log somewhere that I can tap into that would reveal to me more detail…
user5248
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linux system slowdown debugging, high sys usage

I have a remote linux system that became super slow yesterday. Since the remote luks unlocking I've setup doesn't seem to work reliable and I won't be able to physically access the machine within the next 10 days I'm trying to debug this instead of…
xogoxec344
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Distributing load over multiple load balancers

Given a website that could have many hundreds of thousands of concurrent users at peak times how can one manage the laod where load balancer resources can only support 40,000 concurrent connections? (System spec, out of my control) The only method I…
user6916458
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Mysql High cpu load

I have a dedicated server with 48 cores, 128 GB of Ram, 2 nvme with RAID. I have a pretty large WordPress site with 5 GB of MySQL database. The concurrent traffic for the site is from 200 to 700 users. The server always shows that MySQL causes high…
Dev. Soliman
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High average load + low cpu usage + low disk usage + normal network usage + normal memory usage = ok or not?

I see high CPU average load several times a day on my server. For example, 21:20 and 22:45 on the following figure: However, my CPU, disk, and network are all OK: Disk Network CPU Memory Also do not see strange forks Interrupts…
ch271828n
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Windows 10 VM pegs CPU at 100%

We have a Windows 10 VM with one vCPU and 8 gigs of RAM. It runs an HVAC design software that various users can RDP in and use. We've noticed that sometimes, the CPU will (seemingly randomly) max at 100%. When this happens, it becomes impossible to…
CacheMoney
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Nginx socket reverse proxy got 503 responses on concurrent requests

I am using Nginx as a reverse proxy for my PHP base WebSocket application and I try to load test the WebSocket server with Nginx reverse proxy. And I got 503 errors when concurrent users reach around 1,000. But when I test the PHP application…
Set Kyar Wa Lar
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Using core affinity for Debian servers: isolate core to specific tasks?

I currently have an 8-core web server that is running into load problems due to heavy amounts of image processing--Imagemagick and other associated software will often spike the server's load up to 50+. My thought would be to isolate Imagemagick…
Courtney Grimes
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Directadmin Warning The system load average is X

I am not a server guru, could somebody help me understand what part of my server is under load and what can I do to fix this? My best guess is too many connection to node server + mysql, becuse most the time I am getting mysql connection refeused…
Exlord
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LAMP stack with AWS performance

I am planning to move my LAMP stack to AWS as the number of users increases. Current estimations suggest, that the Server has to handle roughly 100.000 users accessing the static landing page, out of which about 5.000 will use the internal pages…
mo_st
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server average load exact formula

I was in assumption cpu average load is calculated depend on number of process in running state (R state) + process waiting for I/O ( D state). But today I noticed that server is showing high load average and number of running process is 1 and there…
Sunil Bhoi
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Server with very high load

I have a problem with my server, which hosts several sites with circa 400 concurrent visits at peak time. The problem is that every few hours the load of the server gets very high for a minute or so, and then it will get back to normal again; this…
Ali Coder
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Why there are so many "ss" process on my server (CentOS with nginx serving the web)?

There are about 500 concurrent users. It's because some famous people on social network repost a link. This happened before. And our server were performing good. But this time, the server is getting very slow and I noticed that the load is very…
AGamePlayer
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