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0answers
24 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 ...
0
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0answers
31 views

Why is my TPS/TPM value so different between benchmark factory and HammerDB?

I am using both benchmark factory and HammerDB to generate load against an Oracle 12 database. In both cases I use the same DB on the same storage. In both cases I use a warehouse size of 100. When ...
-1
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1answer
73 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 ...
0
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2answers
2k 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 ...
0
votes
1answer
189 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
votes
1answer
102 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 ...
0
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0answers
99 views

Oracle orion I/O bechmark fail

We use oracle orion as our i/o benchmark tool. And our test device is Fusion-io ioDrive Duo 640GB.The platform is Red Hat Enterprise Linux Server release 6.2 (Santiago). And the orion version is ...
9
votes
2answers
938 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 ...
1
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0answers
19 views

Benchmark Bootdisk

We have a number of Windows PC's and servers lying around the office and I am looking for a simple A/B way to decide whether to keep or scrap them. I can see a number of benchmark tools around from ...
4
votes
2answers
331 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 ...
0
votes
0answers
49 views

What purpose does the unixbench 'execl' measurement serve?

This is one of the standard suite of measurements that unixbench takes. Definition: Execl Throughput This test measures the number of execl calls that can be performed per second. Execl is ...
8
votes
3answers
268 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 ...
1
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0answers
178 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 ...
0
votes
3answers
63 views

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 ...
0
votes
1answer
902 views

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 . ...
0
votes
1answer
207 views

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 ...
3
votes
1answer
73 views

benchmark my own servers

I have a pile of old and assorted servers. I want to benchmark, stress test and collect all hardware info from them before putting them into test lab environment. I would also like to be able to ...
2
votes
2answers
175 views

Are most webserver benchmarks useless? [closed]

There's a plethora of benchmarks out there, comparing Apache, nginx, lighttpd, LiteSpeed/ OpenLiteSpeed, Cherokee etc. Unfortunately, it seems that most of the benchmarks are of the "small static ...
1
vote
1answer
2k views

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 ...
0
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0answers
155 views

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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votes
1answer
123 views

Can postgres go faster? [closed]

My question is simply: have i missed any configuration settings that might make postgres achieve better read throughput? Background I'm modeling a very simple twitter program. My schema has only 3 ...
0
votes
0answers
71 views

2 identical systems but different harddisk benchmarks results

I have 2 Dell pe2950 with a raid5 configuration. They are identical inconfiguration, however if I do a harddisk benchmark with ATTO Disk Benchmark I get very strange results. Both machines are of ...
2
votes
1answer
57 views

Benchmark individual drives in RAID5

I'm running a server with 3 RAID5 arrays through an ARECA 1880i coupled with a HP-SAS Expander. After experiencing a massive degradation in performance lately, I want to benchmark the drives ...
3
votes
1answer
304 views

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 ...
0
votes
1answer
54 views

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 ...
1
vote
0answers
63 views

NGINX Benchmark

I had set up nginx, php-fpm and mysql as web server. Now I am testing the server that I've configured using ab (Apache Benchmark) I use this command : ab -kc 100 -n 100 http://myserver/index.php but ...
1
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0answers
136 views

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 ...
-1
votes
1answer
25 views

Where can I find more info about “Sbench”?

There's a program we are using for benchmarking our web apps that is called Sbench. Its help page shows: FAST - Sbench 2.0.0.beta1 - 2008-09-13 redhat3-i686 PLATFORM : linux2 / posix However I ...
1
vote
2answers
238 views

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 ...
0
votes
1answer
231 views

How can I test what kind of server specs do my website require for 1000 concurrent users? [duplicate]

My website is similar to this. Same concept. http://www.solomid.net/ I expect 1K concurrent connections to my website. The website; Uses Laravel 3, Partially Memcaches queries, Mostly CRUD ...
0
votes
2answers
293 views

How to test the max. number of connections of a given TCP port [closed]

We are using a server (closed sourced) written by a vendor that claims it supports up to a maximum of 100 concurrent TCP connections. We want to test this claim. We can certainly write a script to ...
0
votes
2answers
65 views

How to Compare better Memory utilization between two machines [closed]

i am having two kvm hosts with same h/w and os,only difference is one host is tuned to use huge pages. How can i compare which is performing better I am planning to use some application that is more ...
1
vote
1answer
710 views

What does “reclen” (record length) in iozone benchmark mean?

What does the "reclen" field mean? Googling showed that "reclen" = "record length", but I still don't know what "record length" means. KB reclen write rewrite read reread ...
2
votes
2answers
110 views

Effective toy benchmark for a computer? [closed]

I wanted to do some (very rough) comparisons between different computers, seeing the relative compute performance of laptops and cloud machines (AWS EC2, rackspace, etc.). I wanted something ...
0
votes
2answers
1k views

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 ...
3
votes
1answer
451 views

Apache Benchmark is slow from public network, magnitudes faster locally. What are some things I do to speed this up?

I am testing my Linode Ubuntu 14 64bit server out, it's the most basic server available from them. I am using Apache Benchmark to test the server, as well as a multithreaded script I wrote in Python, ...
0
votes
2answers
390 views

Does Apache Benchmark allow intervals between each request?

I have a server which blocks burst request (if the same IP address accesses the server more than 3 times a second, it will serve 500 error). So when I use Apache benchmark, I see a lot of failed ...
0
votes
1answer
79 views

Benchmarking PHP memory use across multiple servers?

I have a Drupal website that I've done quite a lot of optimization to in order to reduce memory usage, but it's still running at ~50MB peak per non-cached page load. Given that I've run it on a local ...
0
votes
3answers
386 views

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 ...
2
votes
1answer
447 views

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 ...
3
votes
1answer
559 views

What does “receive” and “exceptions” mean in ab (Apache Benchmark) “failures”?

Getting this result from ab: Concurrency Level:      10000 Time taken for tests:   69.153 seconds Complete requests:      30000 Failed requests:        10379   (Connect: 0, ...
3
votes
1answer
173 views

If external AB results are 200 rps and internal AB handles 3k rps, can I only handle 200 (limited by outbound speed) or 3k?

I've been trying to blitz.io my site, AB, etc., to try to get an understanding of how many concurrent users can use my site. Within my own box: Concurrency 500, 10000 hits 3k reqs per second. ...
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votes
1answer
716 views

Whats is better? AMD Opteron 3280, 8 Cores, 8x 2.4 GHz vs Intel Xeon X3210 Quad Core [closed]

What server is better to rent and make a hosting for large website. IIS 7 asp.net 4 and sql server express. under windows 2008 r2 standard, and using hyper-V with linux (ubuntu), to ssh server. AMD ...
1
vote
1answer
134 views

Test site speed

I am test driving an Akmai CDN architecture and before committing to buy, I would like to gauge the real performance gain from the acceleration feature. What would be the best MO for doing speed ...
6
votes
2answers
1k views

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 ...
3
votes
4answers
1k views

What does “random seek time” really means in HDD benchmarks?

I am currently benchmarking a hard drive. I am using HW32 for the measurement. The result has two parts: random seek time: 20 ms random read throughput: 30 Mbytes/s I am not sure the methods HW32 ...
0
votes
2answers
134 views

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 ...
2
votes
1answer
392 views

CPU Throttling on Opteron 6272 in Windows

I'm in the process of attempting to benchmark a multithreaded application on my new HP Proliant Server which has an 2x Opteron 6272 and 64gb of ram. When I run the application on a desktop machine (a ...
0
votes
3answers
752 views

What HD/SSD performance benchmarks are relevant to SQL Server?

I'm looking to buy an SSD for a SQL Server computer, what benchmarks should I be comparing? High/low queue depth? Random/sequential transfer rates? IOPS?
1
vote
1answer
1k views

Test Centos performance

I have a VPS with 4GB Ram and Core17 processor. The server its working really bad, the basic commands like w, ls or top have a serious delay and the page speed from google webmaster is way up. Of ...