Questions tagged [performance]

Questions about server hardware and software performance, or network performance.

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Performance issues with Smart Array P410 Controller and Raid 0

at first I want to say that I am a young student that is just experimenting with some server hardware to provide a dedicated server with games server instances running on it. I am not a professional ...
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19 views

Why overwrite performance so slow on USB Flash Drive? [closed]

The USB Flash Drive Info is: [email protected]:/home/xlight# dmesg |grep 'usb 2-1' [ 2.202944] usb 2-1: new SuperSpeed Gen 1 USB device number 2 using xhci_hcd [ 2.228180] usb 2-1: New USB ...
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My very first SSD - slow, resource hog? [migrated]

I just bought my very first internal SSD and installed it into my desktop PC. I was running out of disk space and want to use it for data storage. The OS is installed on the first disk, which is a ...
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36 views

Production server much slower then local test server when sending large request

I am running a django app and I am trying to send an API POST-request which is pretty big to my production server. Now the problem is that what takes 4 seconds locally takes 1 minute in production. ...
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19 views

Writing to SSD slows down system

I've connected an additional SSD into a Windows 7 Home Premium 64-bit desktop PC and tried moving files to it (mostly large files > 10 GB each). This slows down the system to a point where it's not ...
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2answers
173 views

Is there a speed and performance difference between VPNs (L2TP, etc.) vs. port forwarding?

Let's say you wanted to transfer a 1 GB file from a machine at site 1 to a machine at site 2. You can either connect the two machines via a VPN (L2TP) or basic port forwarding. Which connection method ...
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1answer
20 views

Strictly segregate traffic in nginx reverse proxy?

I have nginx configured as a reverse proxy. It proxies two upstreams not under my control: Speedy and Flaky. Speedy has consistently high uptime and consistently low response times. Flaky sometimes ...
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17 views

Caching video files - Good practice or not

We are building a MOOC website where we have courses, chapters, sections and content. We have video content and we are thinking if we should cache video files just like we are caching js files. Is it ...
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1answer
23 views

What are the server requirements in terms of CPU, RAM and bandwith for etherpad-lite? [duplicate]

As my previous post was marked as duplicate of a very generic question, I want to post here again,as i found an answer :-) For an event with 500 to 1000 participants we plan to use etherpads for ...
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1answer
86 views

Postgres SELECT extremely slow, EXPLAIN ANALYZE SELECT not slow at all

Some time ago my team noticed extreme slowness in SELECT queries on our production server. For a table with over 1 million rows, we're talking about a couple of minutes. These are simple queries, e.g. ...
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1answer
58 views

HTTPS session resumption sometimes partially working

I'm having an issue with ssl session caching. To test if server configuration is OK, I use the following command: echo | openssl s_client -connect <server.com>:443 -reconnect 2>/dev/null| ...
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AWS Lightsail running slow with 6s time to first byte

I recently spun up an AWS Lightsail Ubuntu instance to install Cachet with following specs: 1 Core vCPU 1GB RAM 40GB SSD 2TB Transfer I've installed and configured Cachet (which is a very ...
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23 views

Apache2 mod_dumpio logged output bytes does not match %O in access.log

I'm trying to understand why responses sent by my server are long despite the content (+header) being small. For that I'm using mod_dumpio to log all data received and sent by apache. But the logs ...
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1answer
26 views

Windows vps performance

Windows vps performance is not as expected while I see this message in /var/log/messages. [ 7283.526915] kvm [34279]: vcpu0 disabled perfctr wrmsr: 0xc2 data 0xffff Its a KVM vps on 3.10.0-1127.19.1....
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500 Gateway with EC2 m5.2xlarge

I have an EC2 m5.2xlarge with wordpress and the following server configuration: https://pasteboard.co/JwP5Ecg.png How is possible to receive a 500 Gateway Error for importing a csv with 50 users (45 ...

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