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3answers
66 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
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2answers
135 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 ...
1
vote
1answer
789 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 ...
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1answer
135 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 ...
1
vote
1answer
338 views

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 ...
0
votes
1answer
75 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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1answer
244 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 ...
0
votes
1answer
181 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
63 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 ...
0
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1answer
81 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
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1answer
530 views

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 ...
0
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1answer
337 views

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 ...
0
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1answer
481 views

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 ...
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1answer
371 views

RabbitMQ message consumers stop consuming messages

Our team is in a spike sprint to choose between ActiveMQ or RabbitMQ. We made 2 little producer/consumer spikes sending an object message with an array of 16 strings, a timestamp, and 2 integers. The ...
-1
votes
1answer
77 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 ...
2
votes
0answers
704 views

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 ...
1
vote
0answers
31 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 ...
1
vote
0answers
21 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 ...
1
vote
0answers
195 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 ...
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
vote
0answers
149 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
vote
0answers
474 views

How are these AB Benchmarks for a ruby/unicorn/nginx/ app running on ec2?

I am preparing to go live with an app, and was wondering if someone can give me some insight on my benchmarks. How do they compare, what system level tweaks can I make to improve them etc. My setup ...
1
vote
0answers
55 views

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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0answers
26 views

Benchmark network (internet) connection on server

I have a dedicated ubuntu server I rentet. Now I'm running a lot of ruby background processing on that server, that - among other things - does a lot of get requests to very small images (about 10kb) ...
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0answers
69 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 ...
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0answers
115 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 ...
0
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0answers
62 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 ...
0
votes
0answers
80 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 ...