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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.

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.

Benchmarking is a multidisciplinary process and can require management, engineering, operations, data science. and user experience expertise.

A key concern when benchmarking is making sure the tests performed are analogous to how to system is actually used. When benchmarking a server, the following metrics may be considered (in addition to countless others):

  • Ping response time
  • Average Load
  • Number of Dropped Requests
  • Number of Concurrent Connections Possible
  • Power Consumption
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How to prove that DNS traffic is being lost

In my office LAN, queries to the DNS servers outside our LAN really often fail (timeout). I suspect that it's some problem with our provider, but they have not responded to my complains. Is there a tool that I could use to benchmark/measure the…
user3915
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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 the CPU speed as I feel the runtime is meaningless…
Konrad Höffner
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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 have similar configuration, the biggest…
Nickolai Leschov
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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 default httpd.conf settings. If I set a simple…
blacktie24
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Benchmark MySQL Cluster using flexAsynch: No free node id found for mysqld(API)?

I am going to benchmark MySQL Cluster using flexAsynch follow this guide, details as below: mkdir /usr/local/mysqlc732/ cd /usr/local/src/mysql-cluster-gpl-7.3.2 cmake . -DCMAKE_INSTALL_PREFIX=/usr/local/mysqlc732/ -DWITH_NDB_TEST=ON make make…
quanta
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A practical way to do healthcheck for a new server?

I am currently trying to do healthcheck for a new server in data center as a first QA before using by any application side. "What is the practical way and tools to check that the server is fine to use?" About the tools, I am looking at memtest86 to…
A-letubby
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How to protect server from simple DoS attack

Please note I am NOT asking how to protect server from DDoS. What I mean is that if someone runs siege -c 1000 www.example.com on his VPS. That will result in my server serving thousands of requests and slowing down. If I run siege targeted to say,…
Tomáš Fejfar
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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 concurrency of 1000. I get this error after a fraction…
gremo
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Benchmark linux server?

I want to benchmark some servers but i have never done it before. Could someone suggest me some script or give me some guidelines for testing of basic, usual web server. What are the most important parameters etc. What application/way of testing you…
mariotanenbaum
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Use switch or direct link

We are thinking of setting up a high availability PostgreSQL server with master-slave configuration (possibly multiple slaves). Should we use a direct link between a master and a slave or let them connect through a switch? We might add more servers…
amitlan
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Where to get an CUDA/GPU enabled version of the HPL benchmark?

After setting up a new compute server for my research group I need to evaluate the overall performance of this machine, including both Tesla cards. I found some information about a CUDA enabled version of Linpack and how it is used, but no download…
M.K. aka Grisu
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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 browser name.local for example I get one of my…
Fajkowsky
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What's the difference of running ab locally and remotely?

I was benchmarking my site with apache ab and I noticed that the response time had big differences when running ab on the server and running ab on a client box remotely. So what's the biggest difference between running ab on the server and running…
Mickey Shine
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Xen/KVM host speed vs "clean" kernel speed

We look to continue running some apps on Dom0/KVN host, and I like to know, if there any performance difference between Xen/KVM enabled kernel, and "clean" regular kernel. Have someone ever bench-marked stuff as this one? Thanks!
SyRenity
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Iozone: sensible settings for a server with lots of RAM

I have just acquired a server with: 2x quadcore Xeons 48G ECC RAM 5x 160GB SSDs on an LSI 9260-8i Before deploying the target platform, I'd like to collect as much benchmark data as possible, testing I/O with hardware RAID in various…
Frank Brenner
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