Questions tagged [benchmark]
Benchmarking is the process of gathering data about the performance of a system in different scenarios to measure the impact of changes to the system, to compare the system with other options, or to determine maximum capacity.
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"Hot data" and erasure coding: how to know if it is efficiently handled?
It is well known that erasure coding adds extra complexity because of encoding and decoding operations. Due to this drawback, most of cloud services recommend to use data replication for hot data and ...
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How do I determine the number of seeks performed on Linux?
I have two programs that write to my servers disk.
One I wrote, it does linear writes, it's writing data quickly. Another I'm benchmarking, it's writing data at a 3rd of the speed. It doesn't do much ...
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How to verify network quality before running important benchmarks?
I have multiple CentOS servers around the world. They all are running a PHP script that tests the latency of some services once per minute.
The problem is that sometimes these servers have local ...
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find out NUMA locality of process RAM
I am doing an application benchmark with multiple instances of the same application. I found out that pinning their processes (with sched_setaffinity under Linux, with TaskManager under Windows) to ...
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Weird results of filesystem benchmark (bonnie++, VPS)
I wanted to check the performance of filesystems of my newly purchased VPS and compare it to the old one, the results surprised me though and I don't know how to analyse them.
I picked bonnie++ to ...
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CIS benchmark differences between 2008R2 to 2012R2
I'm looking at hardening our golden image inline with the CIS benchmarks for Windows Server 2008R2 and 2012R2. But, after looking at the two benchmark documents(registration required - sorry) from CIS,...
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ejabberd benchmarks and performance
I'm considering to use XMPP for messaging platform (not a chat, I'd rather use it as a transport protocol) for communicating one to one, one to many between custom clients and I think I will ...
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Benchmarking MS SQL Server 2008
We have several production SQL servers, some physical, some virtual. I would really like some generic scripts that I could run against each maybe using AdventureWorks to stress test them and compare ...
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How do I cross-reference OpenSCAP benchmarks to the CIS documentation?
I'm using the SCAP WorkBench, and have gone in to customize the CIS profile for RHEL 8. The benchmark items are clearly titled with things like "Modify the System Login Banner". The item ...
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Quick Way to Evaluate Linux Server Load To Determine if Upgrade is Needed?
I've got mission critical apps running on my VDS. We're not experiencing any visible lag issues from the user perspective. However I want to be cognizant about when it's time to upgrade. The network ...
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Low network speed with small packets
Using iperf3 to test the network with --length 1000 --no-delay:
iperf3 --interval 1 --time 3 --no-delay --length 1000 --parallel 100 --client 10.0.0.3
Result:
[SUM] 0.00-3.00 sec 835 MBytes ...
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Benchmarking websites via a browser to check loading times of a server?
I'm looking for a benchmarking tool to help find out the loading times of a website, I what to be able to run it like 250 times automatically to work out if a series of changes improves things or not.
...
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Benchgraph httpref - cannot execute binary file
I am trying to make graph of an httperf file with benchgraph (http://www.uprb.edu/profesor/jsola/benchgraph/)
When I run the command: benchgraph --ff txt --fn httperf --exporter httperf
I get
bash: ...
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How to compare and state performance on virtual server instance?
I want to report performance statistics about an algorithm that runs on a virtual server instance with Ubuntu on it. I measured runtime and maximum memory usage but I want to give a statement about ...
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Apache AB results: why does adding concurrency not increase requests processed per second?
So I've been trying to use apache ab to benchmark performance, but I'm having trouble understanding why I'm getting these results. FYI, its a PHP app using Zend Framework, mySQL database, and mostly ...
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Fail with ab test with nginx, two workers and 1024 connections?
I'm doing some tests with nginx 1.4.1 and Node.js 0.10.5 on my development machine (P8700 Dual Core 2.53Ghz, 4Gb RAM running Xubuntu x64). Unfortunately I can't do ab with 100000 requests with a ...
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How benchmark server with load balancer
Hey I have four computers(with linux):
two with mediawiki(mirror, both connected to one db)
one with mysql
one server(DHCP,DNS etc)
I configured on my server load balancer and now hen I type in ...
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virtio /proc/net/dev
we are doing some VM (citrix-xen) / real machine benchmarks at university and ran accross a strange behavior. we used netperf's stream test to meassure the performance between the two machines. both ...
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Strange behavior when benchmarking a Rails application
I was making some benchmarks on my Rails application before releasing it in production.
When running Apache benchmarks with only 2000 requests and 10 concurrency level I have seen that the last 20% of ...
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Verify server performance
I'm looking for a quick and SIMPLE way to verify that new servers are performing as expected.
The most important metric is disk performance, second is network performance. I’m trying to prevent ...
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Slow read speed in ZFS mirror (slower than write speed, and very slow for small chunk sizes)
I have a server running debian on top of a ZFS 3-way mirror of Exos X18 18TB (ST18000NM001J).
I'm benchmarking it and I'm finding some surprises for the read rate under certain conditions.
But first, ...
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Big performance gap between two similar servers in mysql-percona 5.6 ubuntu
I cannot figure out reason of performance difference between two (three?) similar percona 5.6 instances. I prepared some tpcc-like benchmarking using sysbench and among 3 similar servers, one is ...
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Benchmarking AWS outbound Internet bandwidth (egress) "up to 25 Gbps"
We conducted our tests on c6gn.2xlarge AWS instances located is us-east-1 region, which are advertised in AWS documentation to have a network performance of "Up to 25 Gbps" with a baseline ...
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Measuring bandwidth from a server - determine capacity of network
I am building a system that will serve video content, and am trying to determine the maximum throughput I can achieve.
I have been using iperf3, and initially, from a separate VM (in the same data-...
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How to correctly benchmark sequential read speeds on 2.5" hard drive with fio on FreeBSD?
Like suggested in https://askubuntu.com/a/991311 I tested the read speed of a 2.5" spinning hard drive on a TrueNAS/FreeBSD system.
For "Sequential READ speed with big blocks":
fio --...
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Benchmarking vCore Performance
A certain public cloud provider is phasing out its old small VM instances and replacing it with a new category of instances. While the old model lists "vCore 2.4 GHz" the new model features &...
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Benchmarking ssd MySQL write performance: sysbench oltp_write_only vs write iops, fio. Madness
I've benchmarked about 10 diffrent ssd devices with sysbench oltp_write_only.lua and I found no coroleation whatsoever between max sustained write IOPS of device (both from specification and from fio -...
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Latency in fio vs ioping
There are two tests:
ioping -c 10 -S 4K -D .
9 requests completed in 2.49 ms, 36 KiB read, 3.61 k iops, 14.1 MiB/s
generated 10 requests in 9.00 s, 40 KiB, 1 iops, 4.44 KiB/s
min/avg/max/mdev = 259.5 ...
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fio numjobs & iodepth Values to Simulate Database PostgreSQL Workload?
I am trying to benchmark a ZFS RAID-10 array of SATA SSDs using fio with settings that are somewhat representative of database workloads like for PostgreSQL.
For example, for random reads:
fio --...
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Benchmark Azure App Performance
I have an ASP.NET MVC web app running in Azure. I'm making a change to some of the resources it uses in the background but I want to be sure it's not going to have an adverse effect on the ...
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DITG (ITGSend, ITGRecv) via two network interfaces of the same machine
I have a server on which a transmission benchmarks shall be performed. This server has 3 network interfaces (172.16.10.205 for SSH, 10.0.4.105 for sending, 10.0.8.105 for receiving)
...
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How to test route lookup performance?
I need to test (IPv6) route lookup performance in the Linux kernel. I want to know how much time it takes to find a match if there are 100 routes, or 1000, or 10000 and so on. I'm using containers, so ...
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Memory bandwidth in OpenVZ container
What determines memory speed of OpenVZ container?
I've run sysbench --test=memory --memory-block-size=1M --memory-total-size=1G run on several OpenVZ powered VPSs from different providers and observed ...
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Synology NAS X-Fer Speed Possible Issues
I recently purchased a Synology DS1815+ 8-Bay NAS for my organization and I have been running benchmarks all morning.
I purchased:
4 x 4TB 7200RPM HGST NAS (Enterprise) drives &
2 X 256GB ...
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Strange behavior of web stress tests
After some server configuration, i decided to do a stress test using siege.
2 front servers in lxc containers, load balancing nginx - on the host machine.
(if need, I add nginx and sysctl configs ...
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Benchmark: nginx1.8+php-fpm vs apache2.4+mod_php
I'm benchmarking these two setups (installed on the same system)
nginx 1.8.0 + php-fpm (5.6.14-0+deb8u1)
apache 2.4.10 + mod_php (5.6.14-0+deb8u1)
Have runned through the output of phpinfo() and ...
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Slow PHP response times from Apache Benchmark
I have a VPS running Apache (prefork mpm) with 1gb RAM and 2 x Intel(R) Xeon(R) CPU E5-2620 0 @ 2.00GHz.
I setup 2 test files to run through Apache Benchmark:
htmltest.html (basic HTML file which ...
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How to benchmark a whole storage infrastructure
I'm a 100% sure that I'm not the first one to consider benchmarking a whole infrastructure, but yet I haven't found any relevant information on how to face this challenge.
As I guess we all know what ...
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Is an I/O benchmark made for hardware an accurate assessment of a Windows VM's performance under vSphere 5?
We support an enterprise application running on Windows Server 2008 R2. One of our customers has chosen to install to VMWare, and what I'm finding is that the VM's are relatively slow compared to ...
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Solaris iSCSI read speeds increase when we start writing
Here's one I haven't seen before. We have an IBM Storwize V3700 storage array, 24 TB, RAID 5 connected to a Solaris 10 file server via an iSCSI link over Gigabit Ethernet (no MPIO at present).
We ...
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Issue with Dovecot connection staying alive : memory or configuration issue?
I had a similar question posted a while ago, and I Thought it fixed my issue, but that was unfortunately not the case.
I have a benchmark application which connects about 500 users to a Dovecot 2.2.5 ...
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Mysql general query log tool to play back queries in time?
I am trying to reproduce production activity in time for benchmarking purposes from the mysql general query log. I'd like to be able to use the date data from the log to reprduce the time intervals ...
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How to fill up linux cache?
I am well aware on how to drop (e.g. /sbin/sysctl vm.drop_caches=3 ) caches in Linux, but for benchmarking I'd like to do the reverse, fill up the caches up to 100% RAM if possible. How would I do ...
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lighttpd: SMP workers causing performance degrade
I am trying to increase the performance of my lighttpd system by using SMP workers for multiple cores.It turns out that instead of improving the performance it is degrading it. I dont seem to ...
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analyzing webserver benchmark
Recently we get a lot more traffic to our webserver and sometimes it doesn't respond anymore.
We have changed some settings and to get an idea of what our server can handle I've run some ab tests.
We ...
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Short write and read speed disk benchmarking
We're using cloud hosting for some of our backend servers and we noticed that performance on the disks (which as confirmed by the provider are shared with other customers) vary depending on the time/...
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Using Opennebula as an IaaS: Running benchmark accross all nodes, possibe?
Our current situation:
We have one Opennebula cloud infrastructure consisting of a cluster controller and 6 cluster nodes configured and working. All Nodes run debian instances on top of a kvm ...
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Benchmarking MySQL on win7
I've setup a nginx server running php 5.3.6 and mysql 5.5.1.3.
My computer is an AMD quadcore 9650, 4gb ram, 500gb 7200rpm HD.
I ran the PHP MySQL Benchmark Tool v. 0.1, and got the following ...
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Performance of multiple VirtualHosts vs. ServerAlias in Apache2?
until now, we had multiple web servers with multiple IPs and a lot of domains pointing to them (most of the domain logic was inside our CMS). I liked this aproach because a lot of configuration could ...
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Apache Bench high standard deviation
I´m having problems doing apache benchmarks with ab on my servers. Basically, all the results got a high standard deviation, invalidating the results.
This is an example resultset:
Connection Times ...