Questions tagged [slow-connection]

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30 views

Unreasonably slow SSH tunnel - but just in the opposite direction

While setting up rsync to a remote computer, I realized that syncing from my laptop the remote was fast, but the opposite was slow. After some debugging and iperf3, I figured that this only happens ...
0 votes
0 answers
291 views

Nginx as proxy and very slow client weird issue

We have web api with multiple endpoints behind nginx (1.18.0 on Ubuntu 20) proxy. Everything works fine but one scenario. When user whith our company's Android app tries to upload attchment using ...
0 votes
0 answers
132 views

Apache sometimes hangs while responding to requests

I have an Apache web server working in windows environment. It is working smoothly, but sometimes even when on low load, is fails to serve the said requests but quickly loads the page when user ...
2 votes
2 answers
7k views

Slow network speed on ESXi hosts

I have been dealing with this problem for about half a year (had the luxury of time) and hadn't managed to crack it, so I finally resigned and came over here to ask for help from others not just ...
5 votes
1 answer
14k views

Why is a TLS handshake taking *forever* (20 seconds) on a VPS?

I have a server that generally works fine, but gets stuck for 20 seconds when trying to connect with SSL (either SSH or HTTPS display the same pattern.) I tried various connections without SSL, such ...
0 votes
1 answer
2k views

Slow SSH connection establishment with PuTTY but not with OpenSSH

I'm having an a slow connection establishement issue with PuTTY : > time.exe plink.exe -no-antispoof [email protected] exit ...
1 vote
1 answer
638 views

kvm / proxmox 5 - virtio_net slow network 5Mbit, sometimes 900Mbit in opposite or both direction

Environment: several PROXMOX 5 (KVM) servers (kernel: 4.15.18-30-pve) VMs running Debian 9, 10 and 11 (vitrio /qemu-guest-agent current version of the respective Debian version) network cards ...
0 votes
1 answer
734 views

My VPS apache goes down often

I have a debian VPS with 2 GB RAM which is really good for handling big stuff. Recently, however, my website goes down often and I still can't target the exact reason. At first I had 512MB RAM which ...
0 votes
0 answers
422 views

Slow ssh connection establishement in the same LAN

Hi, connecting to some SSH Linux servers on the same LAN takes about 10 seconds : me@PC-A $ time ssh X.Y.Z.T : Warning: Permanently added 'X.Y.Z.T' (RSA) to the list of known hosts. real 0m10.168s ...
0 votes
4 answers
2k views

Why is ping time much higher using wifi than Ethernet connection?

I have struggled with API of https://api.materialsproject.org recently. Because it is so slow and unstable when fetching data. I thought it was just the problem of this site. However, I found it is ...
0 votes
0 answers
118 views

Different traceroute response times for same path

When troubleshooting for slow Internet speed on one computer, I am having systematic slower response times between two computers when running tacert, for any domain.They are both connected to the same ...
1 vote
1 answer
5k views

Is it possible to force Windows 10 to use higher TCP window scale?

I have two Windows 10 machines (bld 2004) I am trying to send data to between two sites. The sites average about 50ms RTT with no packet loss. I am having an issue where the max transfer rate I can ...
0 votes
1 answer
12k views

TCP DUP ACK/Out-of-Order/Previous segment not captured/Retransmission flooded on wireshark logs

Due to slow network, I installed wireshark on the device(laptop) to find this This is a log of the device using internet(Downloading a file),as you can see at the right end of the screenshot, the ...
0 votes
1 answer
762 views

SQL Developer queries are very slow if I am not connected as sys

I want to run my PL/SQL Queries on SQL Developer and created a new user connection. But if I run: set serveroutput on size unlimited; begin dbms_output.put_line('Hello Oracle.'); end; / clear ...
2 votes
2 answers
3k views

Wireguard slow but only for windows upload

We have the problem that the connection from multiple client networks via Wireguard Tunnel to a Samba share on a server is slow, but weirdly it only affects Windows 10 and only uploads. A Linux Host ...
1 vote
0 answers
135 views

Apache server slow responses on AWS instance (Linux 2)

I have deployed a LAMP web app into two separate AWS instances (labeled prod and test). Both are t2.micro, but prod is the older Linux image and test is the new Linux 2 image. Using the chrome browser ...
0 votes
0 answers
18 views

Suddenly milions of visitors to EC2 instance run wordpress multisite. Very slow, now what? [duplicate]

I think the title says it all... My dream has come true, now what? EC2 was something 2 cores maybe 4 gbs of ram... I use S3 bucket as the storage, compressed the images in Photoshop prior to the ...
0 votes
1 answer
361 views

After migrated from AWS to Azure, API response became very slow

Our mobile APIs were hosted in AWS EC2 instance and it was working very fast, say 300 ms. Recently we migrated to Azure VM and after that, all the API responses are very slow, say 2 to 8 secs. The ...
0 votes
0 answers
59 views

Delays on various parts of http requests - help diagnosing

At our school we've been having some weird network issues and I'd need some help pointing me into the right direction to start diagnosing them. The main symptom we're having is that browsing the web ...
13 votes
2 answers
17k views

How to Bond Two (Multiple) Internet Connections for Increased Speed and Failover

We are located in a rural area with two slow ADSL connections (3.5/0.5 Mbps) and wanted to improve connection speed and reliability by somehow "combining" them. The following describes our solution ...
0 votes
1 answer
511 views

Apache - Loading is very slow after inactivity. Most states of connections are in K - KeepAlive

I enabled the apache status module, and saw that most of the connections on the apache scoreboard are showing a "K" value. On my server, when I enable KeepAlive, during inactivity it takes a ...
2 votes
2 answers
2k views

Bacula: initial Full Backup job taking too much time

I've chosen Bacula (v.5.0.2) to do backups of our office worker's data. The Director and Storage Daemon run on a Debian based root server (the SERVER) rented from a major german hosting company. ...
4 votes
2 answers
7k views

How can I troubleshoot slow Apache?

I am running apache2 (2.2) on Ubuntu on a VPS with 768MB of RAM. For some reason it takes several seconds to load any page (even static html). The only component I can blame is Apache. However, I have ...
0 votes
0 answers
244 views

Slow Application with User Accounts from other Domain - Active Directory Domain Trust Issue?

I have a strange issue and hope someone can help me finding the cause. Environment: 2 companies (let's say Company A and Company B) with seperate IT-infrastructures. Each one has its own network, own ...
0 votes
0 answers
453 views

Nginx Reverse Proxy Slows Down Website

I'm new to working with nginx but I set up a reverse proxy on a new server that I have and it is definitely slowing down my website and how fast videos and images load. Maybe somebody here will know ...
0 votes
1 answer
3k views

TTFB taking 2 mins on some pages

We have a server that has recently gotten into an issue where the TTFB (Time To First Byte) takes 2.0 minutes to pass on some subpages of a website. Some other websites, hosted on the same server, ...
-1 votes
1 answer
400 views

Slow domain user logon after promotion of ADC to DC

I had DC and ADC server of Windows 2016 R2 in a domain environment. The DC crashed and I promoted ADC to DC and shifted all five FSMO roles to new DC. After the crashed DC was removed from the ...
0 votes
0 answers
346 views

Moving files to a mapped drive is far slower than direct network share

There is one Windows 10 Pro (1909) Client in our company network that is experiencing an odd behavior. Moving files to a mapped drive brings up to 40Mbs and is therefor much slower in comparison to ...
0 votes
1 answer
1k views

Website suddenly loads VERY slow with SSL

I am using WordPress. I've been using the free SSL from Hostgator from Let's encrypt. A few days ago my website started to load very very slow which results in a significant decrease in website ...
0 votes
1 answer
2k views

how to check the IOPS when I have multiple disks attached to an Azure VM

I have considered Azure Standard_E16s_V3 vm and attached two premium disks (p30 , 1024 GB & 5000 IOPS). How can I calculate the average IOPS considering both disks. This is to check the possible ...
-1 votes
1 answer
682 views

Internet connection slow in linux [closed]

I have a problem with my new internet connection. This is a symmetric 500Mbs connection but i only get 50M in my linux computer. In windows I get 500Mb for up and down with other computer. I know ...
1 vote
1 answer
398 views

FreeNAS + LAGG Slow Transfer?

I built a new file server that should be way overbuilt for its purpose. It has 2 Intel(R) Xeon(R) CPU E5-2660 v3, with 128GB of ram and it is running LCAP through an Intel X540T2 network card to a ...
0 votes
1 answer
1k views

Node JS on Windows : Becomes slow when OS update is processing

I currently have a 4-core windows server. On this server, I installed a nodejs Server (API rest). It works perfectly without latency. However when I start a windows update for the server, nodejs ...
1 vote
0 answers
60 views

NFS mount subsequent reads slower than after mounting

Let me explain the scenario first. I know it may sound ridiculous to have this setup, but once I explain what I'm seen if someone who knows more can explain why it is occurring, I would really ...
0 votes
1 answer
1k views

CentOS 7 SMB Client Slows Down Over Time

I have a CentOS 7 VM running on VMware that is used for archiving data from various servers, the destination is a FreeNAS MiniXL. Some of this is done over ssh, but others are sent using SMB. In ...
1 vote
1 answer
212 views

Downloads from Bamboo server are slow, how can I debug this?

I have a Windows box running Bamboo, a continuous integration server. I can download files from it over HTTP, but they're really slow, like 80 kbps slow. I don't have any speed issues copying files ...
1 vote
0 answers
1k views

Fedora 30: extreme inconsistency on connection speed

I upgraded from Fedora 29 to 30. I'm facing a very annoying network issue on Fedora 30: extreme inconsistency on connection speed! My internet connection is relatively fast: I can download files ...
18 votes
15 answers
30k views

Unexplained slow gigabit network speeds

Update Ok, I've tried the answers below and nothing has changed. I've identified the chipset in the laptop as the NVIDIA nForce 520. I downloaded the latest Vista x64 drivers for the nForce 520 (...
0 votes
0 answers
741 views

Ubuntu 16.04 VPS dropping massive amount of RX Packets

Having networking issues with a Ubuntu 16.04 VPS, causing extremely slow speeds (we're talking about 100kbps). Running ifconfig is showing over a million dropped RX packets from eth0 (no errors) and I ...
1 vote
1 answer
807 views

Why does Amazon recommends reading 'all data' as soon as possible during S3 download?

While reading up official documentation on Amazon S3 Java SDK, I found an interesting note: Your network connection remains open until you read all of the data or close the input stream. We ...
1 vote
1 answer
868 views

How can I determine why db access appears to be slow with one db server but not another using the same site?

We have a setup with two web servers and one DB server in both the UK and Australia. These servers are with Rackspace and the webservers connect to the db servers via private IP in both circumstances....
0 votes
0 answers
355 views

Server too slow due to DNS resolution issue

I have installed LAMP on Ubuntu 14.04.5 LTS on Digital Ocean Server. The issue I am facing from last two weeks is: The site becomes too slow(or say does not load for 5 minutes) at irregular intervals....
0 votes
1 answer
766 views

Set of errors when running a docker container

I have been asked to make a couple tweaks to a legacy PHP project that runs inside a docker container. In order to make those tweaks, I am trying to get a local working copy of the app and associated ...
0 votes
1 answer
75 views

Slow SQL Queries over local net

Slow Queries for SQL over 1Gb link between servers using just SSMS Server Configs: Main SQL Node: 32GB Ram 16 cores Sage Evolution Server: 16 cores 16GB ram The config of the servers is that they ...
3 votes
1 answer
144 views

Is there a way to measure clients connection speed?

Suppose you run a website and you are getting reports from your customers in a particular office that your website has suddenly become very slow. But it's perfectly fast everywhere you test it from, ...
2 votes
5 answers
2k views

How to speed up Drupal 7 with remote DB (not DNS resolving)

we have Drupal 7 on Ubuntu LTS virtual machine (VMWare) with MySQL 5.1 server on the same physical server, but on a different virtual machine. The Drupal website is currently under development, ...
9 votes
2 answers
11k views

Bind DNS Recursion Slow

We have just setup a recursive DNS server using the latest stable release of Bind 9.10 We are finding that recursive DNS lookups are quite slow. Anywhere from 1 - 3 seconds. Once the lookup is in ...
2 votes
0 answers
1k views

Slow windows DNS server

I have a microsoft DNS server for a local domain, running Windows server 2016STD. This computer is also a domain controller. It's configured to forward to fast public DNS servers. From any computer ...
0 votes
1 answer
1k views

Linux servers sometimes doesn't answer TCP connections or very delayed

I have Linux server (Ubuntu 16.04) where every serverce seems to be fine, except that it sometimes answers TCP connection very slowly (eg. 10 -20 sec) or not at all. The server is not under load and ...
0 votes
0 answers
1k views

Samba low performance

I have a small professional network to manage: 1 server and 2 clients under Windows 7 pro. On the 2 clients is installed a software that fetch datas from a proprietary database on the server through ...