Questions tagged [performance-tuning]
Performance tuning is the process of modifying a system to improve its efficiency. This is also known as optimizing.
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Outbound HTTP performance tuning recommendations
I'll detail my exact setup below, but general recommendations for a better web-browsing experience will be useful. A nice checklist of things to try would be great!
I have 600 users on a single site ...
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What program can I use to benchmark network traffic? [duplicate]
Possible Duplicate:
How to test real network throughput between two points?
Given two computers connected by some network interface, is there a standard tool used by an academics publishing in ...
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Is there any way to exclude specific files / directories from SuperFetch?
Overall, I love the SuperFetch feature in Vista and believe it results in hugely noticeable gains in the launch time and overall "snappiness" of the system. However, sometimes it apparently gets "...
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Very slow read/write on software raid1 with nvme device on Ubuntu focal
I have a server with Ubuntu 20.04.1 LTS with NVME ssd devices running on raid1 and the hard drive operates so slow! to open a gzip file to of 500MB to a 3.7GB takes a while.. way more then it should. ...
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CPU C-states disabling ruins network performance
With intel_idle.max_cstate=1:
root@debian:~# curl -o /dev/null http://xx.xx.38.35:999/speedtest/1000mb
% Total % Received % Xferd Average Speed Time Time Time Current
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How to improve performance of Nginx for high PHP processing load?
I wonder how I could improve the performance of my server?
It is configured with Ubuntu 18.04 (LTS), 4 GB RAM, 100 GB SSD, 2 CPU, with Nginx 1.14.0 and PHP 7.2-fpm to handle running and serving a site ...
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Apache performance tuning for high traffic with MPM Event
I currently manage the following set of servers that serve about 700 web pages:
SERVER 1 (WEB)
Web server: Apache 2.4.29 with MPM Event
PHP 7.2.22
CPU: Intel Xeon CPU E5-2673 v4 @2.30GHz (4 cores) ...
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Possible reasons Distribution of durations is tri-modal
Below is the distribution graph of durations from a single page of an asp.net webforms application. As you can see there is a cluster of response times in the 250ms range, there is a cluster in the ...
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Nginx performance issues with single user reqesting but with large configuration file
I have following configuration used in server block and as the number of locations grew, the performance has degraded substantially even if there is only one request (e.g. https://example.com/loc1/...
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Performance on Pinned CPU cores versus automatically managed?
I have a XenServer 7.5 environment where I'm running a single Windows VM with 16 total vCPU's. My server has dual Xeon E5-2620v4 CPU's with 8cores/16threads each clocked at 2.1GHz nominal and a Max ...
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best configuration for 5k requests per second apache [duplicate]
I have a webserver which has 5k requests per second
this overloads my server with the cpu usage
host has 12 CPU and 8GB ram [ almost not in use ]
my httpd-mpm configuration is below :
<IfModule ...
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Apache uses 100% CPU but only part of RAM on heavy load
I am running a Website that gets heavy usage at a particular time. I run apache 2.4 on an EC2 Ubuntu 16.04 server with 4 Core CPU and 16GB of RAM and 2GB Swap. Size of the average apache process is ...
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Diagnosing slow/timing-out web application
I'm seeing average load times of load average: 12.41, 11.94, 11.59 on a linux-based machine serving a web application. It has 16 cores, so the load average isn't unmanageably high.
However, this web ...
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Low NIC throughtput under Hyper-V
I have a Xeon-based Dell T20 with Quad Intel I350 running Windows Server 2016 Hyper-V with OpenSUSE as Gen2 VM. Both Windows Server and OpenSUSE have dedicated ports on I350, no sharing. SR-IOV is ...
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Tuning a LAMP server
I'm trying to load test a LAMP application that my team developed and deployed on AWS ubuntu 14.04 using jmeter. We are using AWS CDN to serve static files, mysql and apache are on the same host.
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How to tune apache with mpm_event
regarding apache tuning, there are lots of good documents and posts on the web
eg. How To Tune Apache on Ubuntu 14.04 Server
unfortunately almost all of them describe how to tune apache with ...
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How are cluster size, buffer size and packet size related for performance?
I'm creating a server on an embedded system. I have a FAT filesystem on an SD card which contains a file, which should be sent via HTTP to some client over wifi that connects to the system.
At first ...
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Zabbix : How to acheive 1s interval with active items?
Is it even possible/recommended ?
We are trying to set up few active items configured with a 1 second interval. However those items don't keep up the desired interval, instead we are gathering a ...
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Optimize Apache serving as backend behind Nginx
Apache (2.4.x) is a well known server and performance optimization is widely discussed and well documented.
Nevertheless, for those cases where Apache is reverse proxied (behind Nginx or other any ...
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How do you measure IMAP performance?
We have a mail server built on top of a Gluster distributed filesystem. While this has proven to be fairly easy to set up and quite stable, the performance of our webmail has been quite slow. So now I ...
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Persist statistics data from Postgres' stats_temp_directory on demand
We are investigating I/O load in one of our VMs and possibilities to optimize it and it showed that most of the load is generated by the stats collector of PostgreSQL. It jumps between 3,5 and 6,5 MB/...
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mod_pagespeed css shown render blocking?
I've already found this topic concerning my problem and figured out Google is about to discuss a fix of the blocking js. However, could somebody please check out my client's site squarecard.de with ...
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How to track down bad performance on an api-server
If my api-server shows bad performance, such as high cpu - can this be blamed on the service or on the server?
If a regular app-server shows bad performance, all I can do is track down the methods ...
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Maximum Network throughput for SWIFT storage
I have a SWIFT cluster deployed as part of Openstack which is currently giving me a max throughput of 95 MBS(Megabytes per second). There are 6 proxy servers and 6 storage nodes with replication ...
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Advice Tuning my server
as many others I Learn many info from you in the past and now I manage to run server independently , now I am new to sql tuning and I been searching around the web a while now and tuning seems to be a ...
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Multipath tcp application level performance measurement
I am working on a project related to Multipath tcp and I want to measure the goodput and the RTT at the application level. I don't want to use a traditional tool(netperf, iperf, ...) and I want to ...
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IRQ not handled by all CPUs
I have a problem about balancing irq. I took irq numbers from /etc/interrupts and assigned each irq to each of 24 CPUs as this tutorial says
for i in {143..166};do cat /proc/irq/${i}/smp_affinity; ...
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performance monitor in iis 7 to monitor which website is using most resources (asp.net)
I am using Windows Server 2008 R2 and IIS 7.5, and am hosting multiple websites on the same webserver. Is it possible to use Performance Monitor to know on average which website is using the most ...
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KVM Slow performance on XP Guest
The system is very slow to do anything, even browse a local folder, and CPU sits at 100% frequently. Guest is XP 32 bit. Host is Scientific Linux 6.2, Libvirt 0.10, Guest XP OS shows ACPI ...
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How to avoid Memory "Hard Fault/sec"
i've a problem on my windows 2008 server x64, and i cannot understand how can i solve it.
i'm looking to Resource Monitor and see about 100 to 200 hard faults/sec. and generally the machine is slow. ...
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Can I tune my Debian KVM server to benefit my Windows guest?
Debian Squeeze KVM server with Win2k8 server guest. The server has 16GBs of RAM and the guest only runs MS SQL, with a 15GB database on it. I am wondering if there is anything I can tune from the ...
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Improving TCP performance over a network with small packet loss
I’m trying to improve my TCP throughput over a “high delay network”, with some packet drops, between Linux machines.
I set tcp_mem, tcp_wmem and tcp_rmem to “8192 20530752 20530752”.
I set rmem_max, ...
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Solaris: Increase TCP's Initial Congestion Window to 10 segments (tcp slow-start)
How can the Initial Congestion Window be increased to 10? It seems it can be done with TCP_INIT_CWND, but I don't know how to do that.
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Why is MySQL table_cache full but never used
I have been using the tuning-primer.sh script to tune my my.cnf settings. I have most things working well but the part about TABLE CACHE makes no sense:
TABLE CACHE Current table_cache value = 900 ...
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AIX network parameters to close TCP sockets of unplugged devices
We have an AIX box, running what we call in banking "ATM Switch" not the ATM networking switch, but the bank ATM driver. where we have some ATM machines connected to two server processes.
The problem ...
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4096 and 8192 block size read slower than write? by using lsi 9361-8i RAID10
is it possible that 1024 and 2048 block size read speed is faster than 4096 and 8192 block?
I'm using lsi 9361-8i with RAID 10 , with 8 x Kingston E50 250G.
result:
1024 = Write: 2,251 MB/s Read:...
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Trying to scale my dedicated server for high traffic
I have a quad core xeon, 8GB ram, and only 2 x 1TB SATA drives right now. I am trying to figure out how to scale my application to handle as much load and traffic per day as possible. I have an ...
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Exchange 2003 I/O Troubles
We have some internal processes that send email to our Exchange 2003 system (on Win2K3 R2 32bit). Recently they have been intermittently failing with various errors -- boiled down they report "...
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PCIe SSD vs SSD vs SAS - which is best for Database?
Since I am going on shipping soon I wonder which generally will mostly boost the database performance ?
The bridge question is - which will boost mostly a database which having a lot of random block ...
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Increase application performance on Amazon AWS
I've got a client with an MVC v1 (.NET) application running on a micro instance. On this instance, I've got .NET, IIS 7.5, and MS SQL Server 2008 running to handle the application. The client has ...
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Increase the performance of sort command on a multi-processor Sun Solaris box
I have a bunch of (rather large i.e. >100MB) comma separated files which needs sorting on 4 processor box with SunOS 5.10
Sort appears to run rather slow (minutes)
I am wondering if there is any way ...
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Before buying it, how can I tell if a storage array makes certain performance counters available over SNMP?
I've noticed that documentation for SNMP reporting that is built-in to devices (i.e. doesn't need an agent running in an OS) usually doesn't include a list of performance counters that are available ...
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Trade reliability for speed in a slow filesystem
On my box running Ubuntu Server 11.10 I have a rather slow soft RAID6 array on four USB sticks (and no other means for persistent storage).
I want a faster filesystem on that box.
I'm OK if I'd lose ...
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Current Number of Requests per Second with Apache 2.4
I know how to test the maximum number of requests per second with tools like apache bench and httperf.
But is there a way to see the average number of requests per second a live server is currently ...
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how to find the highest IO consumer on a disk? [closed]
Can some one help to find highest IO consumer on each individual disks?
i.e Which process consumes the most IO on /dev/sda, the highest IO consumer on /dev/sdb etc.
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Server configurations for hosting MySQL database
I have a web application which uses a MySQL database hosted on a virtual server. I've been using this server when I started the application and when the database was really small. Now it has grown and ...
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How do I increas MySQL Performance by throwing Memory at it?
I have a machine with 1 GB of RAM and have set apache to use STARTSERVER OF 150, and MAXCLIENTS of 150, only half is used so I still have about 500 MB more of spare RAM. I want MySQL to use this up as ...
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Recommended Apache tuning configuration [duplicate]
My web server has configuration 16 GB RAM 8vCPU (Hexcore). Apache version 2.4.
There will be massive site visit. So what will be the best and recommended Apache tuning configuration ? I am using ...
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Seeking advice on performance metrics based on NewRelic dashboard
Some background:
I have been given access to our newrelic dashboard for the production servers running a django app on an AWS account, and tasked to come up with some gatling.io (performance testing ...
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How to tune a web server and prep it for lots simultaneous visitors?
I have another related question but I'm deviating from it since I'm changing my server to use nginx instead of Apache.
Related: Server problems, running out of RAM, really high load average
I'm ...
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