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Questions tagged [performance]

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

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0answers
14 views

Mysql high ram usage [on hold]

I try to optimization Mysql. There is no problem, but high ram usage. Plesk panel shows high ram usage warning. Where am I making a mistake? Do you have any suggestions about optimization? For both ...
0
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2answers
27 views

Performance of Dedicated vs Virtual Server

I have an application that's running in both dedicated and virtual server environments (all Windows Server 2008 R2). Given nearly identical specifications of the servers (memory, processors), the ...
0
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0answers
17 views

Streaming proxied responses with gzip on nginx

I have an nginx reverse proxy in front of a node.js backend server. In my node app, I am able to stream responses as they become ready, so that the client can start downloading resources referenced in ...
1
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2answers
375 views
+50

Serving a static website with nginx. Response time over 600 milliseconds. What’s wrong?

I serve a wordpress blog with nginx http cached to over 99% of the requests with a cache lifetime of 2 days. Here’s a webpage from the site. The webpages have quite a few images and therefore lazy ...
-3
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1answer
30 views

MYSQL just using 1GB [closed]

My System just uses 1GB of Ram but i get a lot of nginx 504 Errors and i guess mysql is the bottleneck any hints welcome htop output
0
votes
1answer
12 views

Hyper-V Mixed SQL server

I'm looking to setup a new SQL server. This is obviously a rather large expense so I was hoping to offset some of the cost by visualizing the machine and putting some other tasks on that same piece of ...
0
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0answers
569 views

What can be done increase bandwidth from Citrix XEN guest to Citrix XEN guest on the same physical host?

Guest VM to guest VM bandwidth on a single Citrix 7.6 XenServer host caps out at about .6Gbits/s using UDP and 6Gbits/sec using TCP. UDP performance over restricted shared memory does not reach ...
0
votes
1answer
47 views

How does sar collect/calculate disk utilization %?

I'm pretty sure sar's disk utilization % shows how much of the disk is being utilized at any given time, but how does it calculate that? I found: %util Percentage of CPU time during which I/O ...
0
votes
1answer
41 views

Linux Ubuntu disk usage

Currently, I have a streaming dedicated server, below you will be able to see server details: HDD: 12TB HDD RAM: 64GB Processor: Intel® Core™ i7-6700 Quad-Core Skylake Hyper-Threading Network speed: ...
0
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0answers
19 views

Rsync: High write load in swift but no writing

I have following problem. After replacing a broken HDD in my OpenStack/Swift node i have an issue. After putting in the new HDD and (re-)starting all of the needed services OpenStack/Swift starts the ...
0
votes
0answers
41 views

apache basic auth slowing performance

I've got a web application running on CentOS 7.6, apache 2.4.6. The website is experiencing significant lag in loading pages, up to 4 or 8 seconds. This is before my php scripts are even called to run....
3
votes
2answers
48 views

Linux VM too slow (vmware) with a lot of resources available

I got a problem with my VM and I ran out of imagination on what can be causing it. My VM is Red Hat Enterprise Linux Server release 6.9 (Santiago) Kernel: 2.6.32-696.30.1.el6.x86_64 These are my ...
1
vote
0answers
76 views

Proxmox bridged TAP-to-TAP virtio performance slow

so a little info about my setup: Running Proxmox 5.3-11 with latest updates Running 2 Windows 2012 guests (we'll call them winhost1 and winhost2) with virtio NICs and latest spice-guest-tools (with ...
0
votes
0answers
24 views

Alternative for Performance and Reliability Monitor

Do you have alternative for Performance and Reliability Monitor? I would really loved to get RAM Use, Disk Read/Write, Processor and Network graphs to be shown in one environment/page, with custom ...
0
votes
1answer
29 views

Cassandra long queries (33s for dropping empty table)

Currently trying a setup for a large project. The project will utilize tens of thousands of tables to chunk the big data into separate pieces that are faster to search. So to test this I'm creating ...
0
votes
0answers
79 views

PHP-FPM - performance tuning and CPU usage

I have a web application written in Laravel / PHP that is in the early stages and generally serves about 500 - 600 reqs/min. We use Maria DB and Redis for caching and everything is on AWS. For ...
0
votes
1answer
25 views

`find /nfs/server/mount/data[12] -name data_*.gz > /dev/null` 4x slower the second time it's executed - why?

An NFS server (it's some sort of NAS appliance, I do not know what brand, nor anything about how it is configured) has a single filesystem exported and mounted on a Linux client. Server and client ...
0
votes
1answer
59 views

Can not run Brotli on my Nginx server

I installed Brotli on Ubuntu 18.04 with Nginx. Here is the procedure I followed : $ sudo apt-add-repository ppa:hda-me/nginx-stable $ sudo apt update $ sudo apt install brotli nginx nginx-module-...
0
votes
1answer
332 views

How to install Brotli on nginx and Ubuntu 18.04?

I installed Brotli on Ubuntu 18.04 with Nginx. Here is the procedure I followed : $ sudo apt-add-repository ppa:hda-me/nginx-stable $ sudo apt update $ sudo apt install brotli nginx nginx-module-...
0
votes
0answers
14 views

Slow upload on HTTP not on Websocket

My fibre network 100 Down /100 Up is usually measured at around 115/115 Mbps. But now it is reading 115/8 when measuring the most common reference site in Sweden, Bredbandskollen.se. Now, when I ...
0
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0answers
37 views

Baffling “indefinite load” issue experienced by users

I was hoping that perhaps one of you guys have an idea about what is happening. For your convenience, I summarized the issue I have been experiencing below including everything we have tried so far. ...
2
votes
2answers
116 views

Choosing right ec2 instance type for Mongodb with sharded cluster configuration

I am designing a MongoDB sharded cluster in AWS. Now MongoDB recommends C4,M4 or D2 instance types with provisioned IOPS ebs volumes to be used with MongoDB. Initially, I chose to use two ...
0
votes
0answers
35 views

understanding openvpn log + slow rdp

I am configuring an RDP Server for conection via the internet using OpenVPN. Making a direct conection using default RDP port, works like a charm… using the Openvpn tunnel, makes it go slow, really ...
0
votes
0answers
14 views

Increase Ubuntu pipe performance to stop breaking

Im running a golang application on Ubuntu Xenial and im trying to push a lot of requests through IPC pipe and keep hitting the following errors write: broken pipe or socket: too many open files ive ...
0
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0answers
30 views

Transfer speed comparisons SDRAM DDR4 DDR5 PCIe3.0 PCIe5.0

date is March 2019, we currently have SDRAM DDR4 and PCIe 3.0. The release of DDR5 and PCIe 5.0 [specification?] is rumored later in 2019... in any case would be 1-2 years before that hardware is ...
-1
votes
1answer
79 views

Can my server handle 12,000 database requests per-minute? [duplicate]

First of all, Apologies if this is a silly question. I've never really had to manage servers and databases, on a "large-scale", that is. ANYWAY, on to the question. I am trying to figure out if our ...
1
vote
1answer
23 views

I have an error message if I disable htaccess files on Drupal 8

I have an LAMP server for my Drupal 8 site. I want to disable htaccess files to have a better server. I followed the following tutorial : https://www.vincentliefooghe.net/content/virtualhost-apache-...
2
votes
2answers
65 views

How to ask antivirus software to work slower and hence use less disk access?

It is our policy for our end-user's computers (usually laptops) to have high power CPUs, GPUs, RAMs (no less than 16GB) and HDD space (1TB), but we save money by choosing lower rotation speed of HDD. ...
0
votes
2answers
43 views

RAID1 vs RAID5: read performances of a 2-disks array

I'm testing some RAID setups built with mdadm. This is about parallel reads on a 2-disks array. RAID1 seems to balance the reads by process, some sort of coarse-grained balancing, so reading the ...
2
votes
2answers
89 views

ZFS performance with databases and more than 80% space used

We have Oracle 11.2 databases on SAN storage (fibre channel on EMC) with Solaris 11.3. For the development environments, the space used on the filesystems is over 80% most of the time. How important ...
1
vote
1answer
45 views

Incredibly slow file copy speed on Virtual Machine

I've noticed one of our web servers has incredibly slow disk drive speed when copying files. The server is a bare metal Dell server hosting a single VM (virtualized mainly for backup and DR purposes)...
3
votes
2answers
75 views

AMD Epyc, occassional crappy performance

I'm working on a 2x AMD EPYC 7451 server, with scaling governor set to performance, yet there are issues when the server is under low load. When the load is low all the cores are basically downscaled ...
2
votes
1answer
93 views

Can consumer SSD over-provisioning improve performance?

While reading up on ways to improve SSD endurance, I came across an Intel whitepaper on the subject of SSD over-provisioning (limiting the host-adressable space on a drive or not including some of the ...
1
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0answers
65 views

Hard disk with xfs file system has bad write performance in subfolders

Our server has a raid6 array (10+2 disks, each disk is 6TB/SATA/7200rpm). We plan to make it an NFS storage shared with other clients. However, the writing speed is very slow: [root@Server ~]# mkfs....
1
vote
1answer
28 views

When using DNS from another continent, will IP's and CDN's reflect host country as well?

Lets say I am using Russia’s Yandex DNS from Canada, or America. Will I be served IP's and CDN's that reflect the host country of said DNS? And will they tend to be nearer to that nation?
1
vote
1answer
36 views

Bandwidth and IO issues when running hardware raid and zfs

I've inherited a setup using Linux Ubuntu 14, a megaraid_sas, and ZFS. We're getting some performance problems (never being able to fully utilize the 6GB bandwidth from the raid) and I'm curious if ...
1
vote
1answer
42 views

How to monitor data transfer speed and volume between two computers on same network

My application on Win2012 Server stores its cache on a ZFS appliance in the local network, during peak load we are seeing some performance degradation, this only happens in the production environment ...
0
votes
1answer
134 views

Apache-PHP slow page in one virtual host causes performance degradation or timeout on other

I have multiple PHP applications running under different virtual host on an Apache server. Each application uses MySQL as backend. Each application uses different MySQL servers in the same data center....
3
votes
4answers
329 views

Nginx thousands of server config files very slow to reload (nginx -s reload)

I have one master nginx.conf where I include the rest of my servers (sever blocks) with the include directive: include myservers/*.conf; My problem is when I have a new configuration file in ...
1
vote
0answers
41 views

Difference in utilisation reported by iostat for two identical disks in RAID1

I'm trying to debug some weird behaviour with Postgres performance and am trying to understand the iostat output. I'm on 2x SSD on RAID1. Why would one of the disks be reported at ~21% utilisation ...
0
votes
1answer
47 views

CentOS 7.4.1708 kernel issuing sub-optimal device read sizes

I have a system running CentOS 7.4.1708, with uname reporting kernel 3.10.0-693. I needed to profile some aspects of disk performance, and so I wrote a basic C program that would use functions in the ...
0
votes
0answers
22 views

setting expire headers seemingly not working

I am trying to turn on my expire headers. I'm running a CENTOS 6.10 kvm with whm v70.0.62. In easy appache 4 i installed the mod_expire 2.4.37-1.1.2.cpanel. Then in my .htaccess I put this script: ...
7
votes
3answers
272 views

How to make rsync of ~2M files from remote server performant for regular backups

We have a large amount of files on a remote server that I'd like to setup regular backups to a local system for extra redundancy. Some details: Remote system is not in my control. I only have SSH/...
2
votes
1answer
49 views

Scaling up / reorganising VPS infrastructure for SMB

I work for a digital agency, where we design, build and host websites for our (local) clients. Currently, we have approx. 80-90 sites scattered on 11 VPS instances. 99% of those sites is WordPress ...
1
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2answers
88 views

Is it possible for Windows clients to carry out external queries through an alternative DNS server directly?

Our Windows domain is far away. DNS performance is affected. Would it be possible for Windows clients to carry out external queries through an alternative DNS server directly? I understand this is not ...
0
votes
0answers
347 views

OpenVPN Connection very slow. Server located in Hong Kong, and Client Desktop is in New York

I have a OpenVPN vps server in Hong Kong. The specs is just 1 Core 2.2ghz CPU and 1GB of RAM. The connection is a 100mbit. But when I connect from my desktop in NY, my speed is only 1-2mbit only. I'm ...
0
votes
0answers
15 views

typeperf disk write log interpretation

When running typeperf utility to get total disk write. typeperf -si 2 "\LogicalDisk(_Total)\Disk write Bytes/sec" I get results in the format "01/11/2019 01:29:40.674","58066.696363" what is the ...
1
vote
1answer
68 views

HTTP/2: speed vs. security

As a measure for speeding up of webpage loading times i recommended to switch over from HTTP1.1 to HTTP/2 protocol. And just today, firtsly in my experience since HTTP/2 rising, i've heard as the ...
0
votes
0answers
280 views

Http Post - long delay at state ExecuteRequestHandler

I have an asp.net mvc website hosted on Windows Server 2012r2 Standard which uses KnockoutJS to display data in a grid. This server is dedicated to the process that I'm having trouble with - it does ...
0
votes
1answer
116 views

Poor network performance on host machine using libvirtd / Qemu / KVM

We've got two Fedora 27 servers that we use to host several virtual servers using libvirtd / Qemu / KVM that are experiencing the same issue. When freshly booted, network performance is great, pings ...