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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.

222 questions
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Bots hitting xmlrpc.php and causing high load on the server

Recently we are having a lot of hits to wordpress xmlrpc.php which in end causes high load on the servers. We tried rewriting all xmlrpc.php to 127.0.0.1 but didn't help much. Since apache was still handling the connections. In the end we blocked…
DasGjinovskaLignja
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adding application server does not improve preformance with haproxy

I am running a haproxy load balancer in front of two application servers that serves images. The problem is that if i use one server or two does not make a difference on performance (see added images). I am using Digital Ocean as provider of the…
Lars Erik Fagernaes
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server large jiffies during boot(Calibrating delay loop...)

The server behaves abnormal, I checked the dmesg log , found the jiffies is very large during boot, between Detected cpu and Calibrating delay loop.. reboot the server does not solve the problem. shutdown and cool down for a while then restart it…
user319514
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Zimbra server - High CPU Utilization

I have used Zimbra server a number of times and it's great, but each time I had to abandon it because of a CPU utilization issue. The mail servers I set up are commonly small organizations with only a few hundred emails a day max. The last time I…
Paul Perrick
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wired dmesg output and high cpu load

I have like 50 Linux servers with the same hardware and kernel, but recently found that some of them suffers from high CPU load, runs very slowly, top and ps show TIME column with impossible large numbers; ps aux output with many 99% CPU. the kernel…
user319514
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MySQL and high jdb2 io/wait

I am running MySQL 5.5 with InnoDB tables. There are about 200 queries per second. There are also tables with 500 000 or more rows. But I have big issues with server load and io/wait especially with the jdb2. jdb2/md2-8 is taking 99% IO/wait see…
Welite
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handle 2k image request a second with nginx

We have made an app that displays dynamic images. We are trying to handle a load of 2k image request a second with nginx. The size of the image is about 0.13 mb and we are using php with this code to serve the image: header("Content-Type:…
Lars Erik Fagernaes
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qemu-kvm take 100% cpu during start Win 7

I have Centos 6 with qemu-kvm version: qemu-kvm.x86_64 2:0.12.1.2-2.448.el6_6.4 On Dell Precision with 2x Xeon 5110 When I run VM qemu-kvm process take 100% of CPU and starting Windows on VM take long time. I don't know why. Anyone can…
Dariusz
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haproxy-varnish can't reach 6k requests

Issue I can't reach 6k requests/seconds. I get a lot of timeouts. My response time goes as high as 26 seconds. Intro I am setting up a server that will host a 100MB static-website. The thing is that I will have to handle about 8000 constant…
Micka
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Medium CPU usage but high load

I know this has been asked multiple times, and generally wa causes high load even if CPU isn't the culprit. However, in our case, wa is ~0 and CPU is at ~45% on a 4 core, 8 thread dedicated server. But load average is 8.33, 8.47, 8.28 Here's a dump…
kouton
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Does Nginx keep the connection open, when it does load balancing?

I have a single Nginx server doing load balancing to several upstream servers. What happens when a request comes in? Does the load balancer keep the connection open and wait for an answer from the upstream servers? Or does it simply hand the request…
jimmiw
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mysql and redis services unavailable during high traffic times

I've have a webserver that runs some services like Apache, Mysql, Redis and some NodeJS apps. On times of high traffic my server seems to do not support the heavy load. When it's ocurring, often when i try to access a page i receive the following…
BigBlast
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Diagnose what is causing Linux system load

I understand that system load is kernel usage such as IO or network. If you don't believe you have high load of either of those two items, what would be some recommended steps to track down what is generating high system load? We are installing…
chrislovecnm
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How to crash Oracle VM intentionally by loading system parameters

I am using Oracle VM. I want to perform a stress test on system parameters like CPU, RAM etc. Can anyone help me out with the ways in which I can load the parameters with high load like using all the virtual cores, RAM starvation etc.
Animesh Jain
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System load average is extremely high

I own a website which is running on a VPS since last week. From monday until saturday, everything is going smoothly. The website has around 4.500 unique visitors a day, and the load average and respond time is fine. On a sunday, the website has…
Tomzie
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