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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What are the major factor that affect a Moodle installation's performance? [duplicate]

How can we assess the performance of a Moodle installation, in terms of Memory, Computing Power needed. Is a VPS or dedicated hosting necessary to Run Moodle. The particular Moodle installation ...
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21 views

Comparaison between OpenVZ, Xen and KVM on top of Virtualbox

I have to make a comparaison between OpenVZ, Xen and KVM. However I only have a laptop for that and I don't want to install all of them in different partitions. My question is, does it make sense to ...
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How to test Xen-Hypervisor performance [closed]

I need you guys help to do my term project of cloud computing class. Firstly, I have Ubuntu 14.04 and Xen 4.4 installed (finally, after days) on my system. My processor supports the virtualization. ...
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10 views

Choosing Block Size and I/O oustanding For Benchmarking Storage System

I have two quenstions. What is the recommended block size for benchmark a storage system, as I know many people would use 4K for random test but for sequential I am not sure whether to use 128K or ...
5
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1answer
90 views

Root-causing vastly different performance on iozone O_SYNC benchmark for two HDD manufacturers

I have two servers A and B with the following configuration: A: 4TB HDDs, with RAID 1 (MegaRAID SAS 2008), 128MB cache, no BBU, write-through mode, 7.2k RPM, manufacturer A. B: 1.5TB HDDs, with RAID ...
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1answer
39 views

how to stress test an apache proxy [duplicate]

I've a EC2 instance acting as a proxy for a webserver that are in other region. This setup works great at the beginning but then, some users start receiving Proxy error The proxy server received ...
0
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1answer
111 views

MongoDB 80,000+ insertions per second

To test my MongoDB 3.2 / WiredTiger on CentOS6, I use the script from http://vladmihalcea.com/2013/12/01/mongodb-facts-80000-insertssecond-on-commodity-hardware/. Here I list the script (a little ...
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1answer
327 views

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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16 views

Simulate N users hitting a site within N seconds, with Siege?

I want to use siege to test what happens when 2,000 users hit the front page of my site within 30 seconds. This is what I've got right now: siege -c2000 -t30s -b myurl.com Is this correct? I can ...
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44 views

Nginx + php5fpm benchmark (with AB) and performance increase

I have a Webserver in a Debian wheezy VPS with 8gb SSD, 2Gb RAM with a Dual Core Intel processor. Web service is Nginx (2 worker_processes), with php5-fpm + mysql. I'm currently doing some website ...
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1answer
471 views

NVMe drives write performance in software RAID 1

We have just received two brand new Supermicro servers 1028U-TN10RT+ with 10 NVMe slots, two of them with Intel DC P3600 800gb hard drives. We were eager to test the performance of the drives as the ...
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1answer
46 views

Trying to understand sysbench

I'm trying to do some basic server benchmarking with sysbench. I understand most of the options, but I was wondering if someone could explain the --max-requests general option. Is it applicable to ...
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1answer
22 views

Simple Linux Benchmarking Test to Perform Throughout Install

I have a script that installs a lot of software. For debugging purposes I am looking for a way of simply benchmarking my system after each install to see which piece of software cripples my server. ...
5
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2answers
753 views

Linux: Why does the CPU frequency fluctuate when using the performance governor?

I'm using a Debian 8 amd64 machine for benchmarking. During experimentation, I would like the CPU to operate at a fixed frequency (preferably the maximum possible). This will rule out the CPU clock ...
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198 views

LINUX fio random read write Total BW and IOPS calcluation

My fio ouptut for random readwrite is as shown below. Fio was initiated with 3 numjobs fio --name=test_random_read_write --iodepth=16 --rw=readwrite --bsrange=4k-8k --direct=1 --size=2G --numjobs=3 ...
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0answers
2k views

How to disable perf subsystem in Linux kernel?

I'm running some benchmarks. My benchmark runner monitors the dmesg buffer between experiments, looking for anything which could impact performance. Today it threw this up: [2015-08-17 10:20:14 ...
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1answer
31 views

Is there a way to determine what impact an upgrade will make other than benchmarking it myself? [closed]

Several posts on capacity planning tells me that the only way for me to determine what hardware I need is to test it myself and benchmark it. Benchmark your code on hardware similar to what you'll ...
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0answers
24 views

Filesystem benchmark read tests

I am benchmarking my filesystem which is ext3 and I made few tests with program hdparm. To be exact I conducted hdparm /dev/sda4 -t test (/dev/sda4 is my ext3 partition). And I got results with ...
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0answers
120 views

Why is Apache Bench not ignoring content length?

I run Apache Bench like so: ab -n 11 -c 1 http://dev-web.asl.ac.com/ And I get 10 failures, because the length changes on each request: Server Software: nginx/1.6.3 Complete requests: ...
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1answer
123 views

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 ...
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65 views

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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1answer
86 views

Benchmarking load balaners

I am working on to benchmark two different load balancers (pound and haproxy), but are unsure how this can be done. Of couse httperf can be used, but it may be technically difficult to actually make a ...
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1answer
213 views

Why is Apache 2.4.7 in ab tests just as fast as NginX 1.4.6?

Im very confused right now... I've always used Nginx to serve up static files and pass off php to Apache. I built a new box 4GB Ram, installed Apache 2.4.7 with mpm_prefork module and NginX 1.4.6. ...
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1answer
464 views

Sysbench MySQL cannot connect

I have created a user named sbtest, with no password, with all rights on sbtest, and the following error occurs. What am I doing wrong? $ sysbench --test=oltp run --debug sysbench 0.4.12: ...
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1answer
77 views

Are there benchmarks that measure code execution with various CPUs? Nodejs server building

I have experience building PCs with gaming in mind. But where do I start when it comes to building a server (running specifically NodeJS programs)? I know the most significant factor would be the ...
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1answer
288 views

measuring network throughput with netperf

I'm doing benchmark test of Linux server using netperf. According to information at networksecuritytoolkit the theoretical max throughput rate for 1514-bytes packets is 117.35 Mbp/s. However I'm ...
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1answer
85 views

Influence of kernel code execution to Load average in top?

I'm trying to tests the amount of CPU that iptables use for NAT. Perhaps it will be more accurate to say "the amount of CPU that the netfilter kernel module" uses. The approach i took was to try and ...
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1answer
184 views

Strange Disk Benchmarking results for our storage, how to explain? [closed]

I recently tested the storage we got from our hosting provider. I don't know what raid config or how many disks the storage contains of. I used Atto Disk Benchmark which sends smaller and bigger ...
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1answer
198 views

Swapfile on SSD and Memory Speed Comparison [closed]

I'm running Ubuntu on Digitalocean's instance that using ssd as their disk, and I'm using swapfile to help memory does the job. What I wanna know is, how can we compare speed between ram and the ...
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1answer
768 views

What is the real-world speed (stream, latency) of USB3 and USB2 over SATA?

What is the real-world speed (stream, latency) of USB3 and USB2 over SATA? It is easy to find streaming speed comparisons, but more difficult to find latency comparisons in the same setup. Answer to ...
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3answers
2k views

Desktop CPU VS server CPU performance - is passmark relevant?

I am replacing my SOHO server (desktop-grade components) with a used server. A quad-core i5 is being replaced with dual quad-core Xeons X5355, here are the details: i5-2300, passmark score 5276: ...
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1answer
111 views

“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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1answer
115 views

AB speed test two different URLS

I have two different servers running locally with different configurations. I'm interested in seeing with is repeatedly better/faster. I'm using siege right now $ siege -r 100 -b ...
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593 views

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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1answer
57 views

Comparing “user time” for same operations on different cpu

In my accounting system i limit using cpu-time by user. But on servers with different cpu's same operation may take different cpu-time. Now i want compare perfomance for my servers to introduce factor ...
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1answer
184 views

how to benchmark an ubuntu webserver using Jmeter and create a test report.?

I have an ubuntu webserver(LAMP) running a clients website.I have already created a test plan with jmeter, what i would like to know is how would we benchmark the server with Jmter and create a test ...
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33 views

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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2answers
10k views

What is the performance implication of hardware vs software RAID in 2-disk RAID0/RAID1 setup?

I am choosing between two similar models of servers, one of which has software RAID, while the other hardware one. Servers in question are SYS-E32-1 and SYS-E32-3 from So you Start (an OVH brand) and ...
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1answer
558 views

What are the performance implications of Hyper-threading for single Nehalem+ CPU? [duplicate]

I am choosing between two models of servers, the major difference between them being the the availability of Hyper-Threading. Servers in question are SYS-E32-1 and SYS-E32-3 from So you Start (an OVH ...
3
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1answer
266 views

How can I measure complex I/O activity to develop realistic benchmarking? [closed]

I need to retrieve a few metric from my service server to benchmark another stroage solution. There are various options are provied by benchmark program(I choosed ...
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2answers
986 views

How much data does Linux read on average boot?

I wonder how much data in total does a freshly installed vanilla Linux system (like 32-bit CentOS 5.10) read in order to get to a virtual console shell prompt? You know, reading all the configuration ...
5
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2answers
541 views

Does LXC container performance depends of host load?

I am wondering if LXC could offer a full isolated benchmarking environment. Let's say we have 2 identical machines, with the same fresh Linux and without network connection. First machine has a load ...
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6answers
11k views

How to duplicate TCP traffic to one or multiple remote servers for benchmarking purposes?

Infrastructure: Servers in Datacenter, OS - Debian Squeeze, Webserver - Apache 2.2.16 Situation: The live server is in use by our cusotmers every day, which makes it impossible to test ...
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1answer
133 views

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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1answer
329 views

What's the AB Command to Test 1000 Concurrent Visitors

How can I perform an AB test with 1,000 concurrent visitors in just a second? Say in 1 second, there are 1000 visitors on my site. And in another second there are 1800. In Another second again (3 ...
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3answers
203 views

File system benchmark that generates I/O from distribution of file sizes [closed]

I am looking for a file system benchmarking tool to test CephFS. This benchmarking tool has to: Generate a set of files (call it fileset) following a particular distribution, e.g., gamma, empirical, ...
3
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1answer
4k views

Apache Bench: SSL handshake failing directly related to concurrency level

I ran some tests on ab and when I use a concurrency level of over 155 I get the following: SSL handshake failed (5). SSL handshake failed (5). SSL handshake failed (5). SSL handshake failed (5). SSL ...
8
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3answers
478 views

Adding CPUs puts MySQL 5.5 (Debian) performance down

I am about to setup a database server (MySQL) in OpenVZ container and I've been wondering how many CPUs I should assign to it. I decided to benchmark it. I compared two OS/MySQL distributions and ...
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367 views

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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3answers
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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 ...