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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How do you do load testing and capacity planning for web sites?
This is a canonical question about capacity planning for web sites.
Related:
Can you help me with my capacity planning?
How do you do load testing and capacity planning for databases?
What are some ...
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Is virtual machine slower than the underlying physical machine?
This question is quite general, but most specifically I'm interested in knowing if virtual machine running Ubuntu Enterprise Cloud will be any slower than the same physical machine without any ...
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filesystem for millions of small files
Which Linux filesystem would you choose for best speed in the following scenario:
a hundred million files
~2k file size on average
>95% read access
pretty random access
high concurrency (>100 ...
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What is the best Linux filesystem for MySQL (InnoDB)?
I tried to look for benchmark on the performances of various filesystems with MySQL InnoDB but couldn't find any.
My database workload is the typical web-based OLTP, about 90% read, 10% write. Random ...
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Xen vs. KVM in performance
What is faster on the same hardware, Xen or KVM?
I'm trying to pick-up a virtualization technology to work, which gives the best performance.
There are some benchmarks here that I found on the ...
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How do you do load testing and capacity planning for databases?
This is a canonical question about capacity planning for databases.
Related:
Can you help me with my capacity planning?
How do you do load testing and capacity planning for web sites?
I'm looking to ...
- 12k
35
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1
answer
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Apache ab: please explain the output
I've looked around, and can't find any detailed explanation of the output at all. Most is indeed easy to understand, but there is one part that flummoxes me:
Time per request: 109537.505 [ms] (...
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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 adjustments ...
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Alternatives to apache benchmark? [closed]
I'd like some tools for ubuntu that I can use to test my server, how much it can handle.
Any suggestions? I've used apache benchmark before, but I'd like to try out something else.
(As a side ...
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What are the best possible ways to benchmark RAM (no-ECC) under linux / arm?
I want to test integrity and global performances of no-ECC memory chips on a custom board
Are there some tools that run under linux so I can monitor system and global temperature in the same time ?
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Estimate FLOPS in Linux?
I am looking for a quick and easy program to estimate FLOPS on my Linux system. I found HPL, but getting it compiled is proving to be irritating. All I need is a ballpark estimate of the FLOPS, ...
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Understanding this error: apr_socket_recv: Connection reset by peer (104)
So, if I do some benchmarking with apache benchmark (ab), and I use large numbers of requests. Then sometimes in the middle of a test I get this error.
I don't even know what it means. So how can I ...
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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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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 ...
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Network latency: 100Mbit vs. 1Gbit
I have a webserver with a current connection of 100Mbit and my provider offers an upgrade to 1Gbit. I understand that this refers to throughput but the larger the packets, the faster they can be ...
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Anyone seen a meaningful SAS vs SATA comparison/benchmark?
I hear lots about SATA being slower than SAS but I've only found 1 decent benchmark.
http://blog.whitesites.com/SAS-RAID-0-VS-SCSI-RAID-0-VS-SATA-Benchmarks__633689244191943184_blog.htm
In this, SAS ...
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Apache AB (ApacheBench) : -no-check-certificate option available?
It seems there is no option to avoid this error : "Verify return code: 20 (unable to get local issuer certificate)". Is there a way to avoid issuer ssl check with AB (like wget's -no-check-certificate ...
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How to generate CPU load on Linux server
I would like to test fake load on the server, I'm looking for some burn-in or benchmark command line utility that would generate CPU load on the system.
I would like to be able to burn-in only CPU (...
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Are there any benchmarks for virtual machines with and without VT-x?
Where can I find benchmarks of virtual machines running common OSes like Ubuntu or WinXP, with and without VT-x? I am using xVM (VirtualBox), but also have the option of VMWare or Xen hypervisors.
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Xen image file vs partition/LVM volume performance
I read quite a lot of advice to switch from file-image VM storage, to partition/LVM volume based.
The claim is that partition/LVM are much faster then image files.
The downside in my opinion, is ...
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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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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 ...
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Why do sequential writes have better performance than random writes on SSDs?
An LBA (logical block addresses) is a mapping table implemented in the FTL to match between logical and physical pages/blocks in SSDs, my guess is that most SSDs (at least when they are empty) keeps ...
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Understanding ZFS NVMe benchmarks with FIO
I'm trying to benchmark an all-NVMe ZFS disk array. I'm familiar with extremely fast benchmark results, with very little disk activity due to efficient ZFS caching. I ran into the reverse: massive ...
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Generate 10 Gbps traffic across nodes
I want perform a network performance benchmarking test so need to generate a 10 Gbps traffic in the network. The nodes are running RHEL 5.x. Can anyone please point me out to suitable binaries etc.
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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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How can I benchmark my website with SPDY support?
I'm currently running a lot of configuration benchmarks on my server using siege,
and I would like to try the SPDY protocol (with mod_spdy for Apache) - but siege use HTTP.
Do you know any tool which ...
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Disable all disk caching for apache2 on linux
For benchmarking purposes I want to force Apache 2 to load each requested file from disk instead of loading it from a cache in memory. From what I have read doing a sync followed by
echo 3 > /proc/...
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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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I/O Performance Benchmarking Linux
Just finished setting up a poor mans SAN with iSCSI and want to benchmark it. What are some good I/O performance benchmarks for Linux besides:
hdparm -tT /dev/sda1
How do I get a IOPS measurement?
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Benchmark linux box
What's the best tool to benchmark a linux machine? I'm comparing machines from two different cloud providers. It needs to be a command line tool. Just need to benchmark CPU and I/O performance.
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IOMeter - What values should I test with?
In some ways I guess this is a piece of string question, however even if there is a "this fits most situations" answer I have no idea what it is, so...
I have a SAN on evaluation, an HP P4000. I'd ...
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is there anyway to know if your supposedly fully dedicated server is really a virtually resource-shared machine? [duplicate]
sometimes I feel my server not responding as smoothly as I would expect (i have a Intel(R) Xeon(TM) CPU 2.80GHz Quad Core), given that for example, the 'top' commands reports a low load < 0.5, CPU ...
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Tools to Benchmark VMware Datastore
Is there a tool that can be used to determine the maximum IOPS on my Datastores? Due to the way the SAN is configured (poorly by the installer) it's difficult to calculate this and we want to know ...
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Apache ab: choosing number of concurrent connections
I can't find anything that specifically elucidates the number of concurrent connections that are reasonable - nor can I find any treatises or research on this topic.
The boss says "The server needs ...
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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 FIO,http://freecode.com/projects/fio)....
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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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Apache 2.4: mod_php vs php-fpm performance
There are plenty of old benchmarks on Apache mod_php vs nginx with php-fpm
However, with version 2.4, Apache can use php-fpm. Are there any sensible benchmarks comparing mod_php with php-fpm (both ...
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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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Solaris 10: Drop disk cache? (to benchmark app)
Is there a command to drop the ZFS and UFS disk caches? (Preferably just one folder hierarchy.)
I'm trying to tuning the performance settings of an application that read/writes data from a large ...
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Is Amazon EC2 reliable for benchmarking?
I've been rethinking the compiler shootout and I began to wonder: is Amazon EC suitable for benchmarking? The environment is totally virtual, so are there any guarantees that benchmarking results will ...
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Simple Linux server benchmark?
I am working on a product which will run on customer's Linux servers. These systems vary in capability greatly and I'd love to have a single benchmarking tool which I could ask them to run to get an ...
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Artificially burden the CPU
I'm looking for a command line application that will artificially burden the CPU. It needs to be better than just a busy loop. We're testing how the system holds up under heat stress and the CPU ...
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How can I verify my vserver provider offers SSD as promised?
For this month I have rented two vServer, each from a different provider. Both indicated that the disks of the system use SSD technology (making me expect a bandwidth of at least 300MB/s and maybe ...
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Apache ab - testing with 1000 concurrency
I am just trying to gather some information on server capacity and ran these apache ab test.
I tested with 1, 10, 100, 1000 concurrency over 1 minute. The result below is for 1000 concurrent users
...
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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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How to have proper expectations about AWS performance?
I'm in the process of moving a webapp from the local server that's been its development home to somewhere else for eventual deployment. I'm currently evaluating AWS and Rackspace, and am in the ...
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RAID0 (both hardware and md) slower than LVM?
I'm doing some benchmarking of nodes as we build out a distributed filesystem. Since files are going to be distributed and replicated across many nodes, we're using raid0 on the nodes themselves. ...
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IO/s and MB throughput for Various RAID Arrays
Are there any resources that have typical throughput and IOp/s for various RAID arrays under sequential and random patterns?
In my case I am more specifically interested in at the moment:
6 Disk ...
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tool for custom sql load testing
I would like to run some tests to compare our mysql application in several configurations. But I don't want to use something like sysbench or oltp tests, because we have some heavy stored-procedures ...
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