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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.

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Wordpress apache benchamrk CPU usage

I'm on a VPS, 4vCPU 4GB RAM. During this apache benchmark test: ab -k -n 10000 -c 3 -l URL I get: Server Load 3.393066 (4 CPUs) Memory Used 35% (1,358,560 of 3,881,408) Swap Used 23.7% (...
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sysbench -IO test weird results?

iam running sysbench on two machines, one is brand new with NVMe disks, AMD Epyc and 256Gb RAM. The results are very nice. The problem is when i run exactly the same test on the old AMD Opteron ...
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Why ELB might be queuing when backend is responding quickly?

I have an app running on an ec2 machine behind nginx and an elb which is seeing really slow TLS handshakes, but only when it's going through the elb. I ran an apache bench test that hits the public ...
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Do memories from different manufacturers impact performance? Is there a way to measure it?

Memory in one of my systems: % lshw -C memory|grep vendor | grep -v NO | grep -v 'American Megatrends' | grep -v 'Intel' vendor: Samsung vendor: Samsung vendor: Micron ...
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53 views

DITG (ITGSend, ITGRecv) via two network interfaces of the same machine

I have a server on which a transmission benchmarks shall be performed. This server has 3 network interfaces (172.16.10.205 for SSH, 10.0.4.105 for sending, 10.0.8.105 for receiving) ...
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757 views

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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49 views

Cluster using virtual machine software with 2 workstations

I want to do a benchmark between databases (MySQL Cluster, HBase and Cassandra). I need 8 nodes. I have 2 workstations Dual-processor Z600: 1. workstation1: 16 core - 16 Go RAM 2. workstation2: 8 ...
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How to reach apache maxclient limit using apache benchmark?

I'm trying to force the apache maxclients error: "server reached MaxClients setting" on my cpanel server to make sure the value is set correctly. Right now I have the maxclients set to 100. I'm using ...
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Web server benchmark - explanation of results? [duplicate]

I made a small benchmark, in which I compare Apache HTTP server deployed to the Virtualbox, and Apache HTTP in Docker (official Alpine and Debian based images) deployed to the Virtualbox. The results ...
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419 views

Low network speed with small packets

Using iperf3 to test the network with --length 1000 --no-delay: iperf3 --interval 1 --time 3 --no-delay --length 1000 --parallel 100 --client 10.0.0.3 Result: [SUM] 0.00-3.00 sec 835 MBytes ...
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How to implement accurate benchmarking against web app frameworks locally?

first question and look forward to being a part of the SF community. I'm interested in automating benchmark testing against various web app frameworks. For example, I'd like to benchmark req/res ...
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How to test route lookup performance?

I need to test (IPv6) route lookup performance in the Linux kernel. I want to know how much time it takes to find a match if there are 100 routes, or 1000, or 10000 and so on. I'm using containers, so ...
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find out NUMA locality of process RAM

I am doing an application benchmark with multiple instances of the same application. I found out that pinning their processes (with sched_setaffinity under Linux, with TaskManager under Windows) to ...
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1answer
1k views

Strange IOPS performance on AWS R3.large & R4.large instances

I have used 4 10GB GP2 EBS volumes with RAID0 on Windows Server 2012R2 image as explained here: http://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/raid-config.html The instance type I used was R3....
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53 views

Memory bandwidth in OpenVZ container

What determines memory speed of OpenVZ container? I've run sysbench --test=memory --memory-block-size=1M --memory-total-size=1G run on several OpenVZ powered VPSs from different providers and observed ...
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3k views

Why does sequential writes have better performance than random writes in 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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277 views

How to calculate /get the UBER value from S.M.A.R.T measurements in SSDs

UBER is a metric for the rate of occurrence of data errors, equal to the number of data errors per bits read over the entire lifetime of an SSD. Mathematically: The numerator is the total count of ...
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755 views

How to circumvent siege concurrency socket select timed out

Being trying to test load capacity of a web site. I am using an aws ubuntu xenial server t2.micro as test client and have SIEGE 3.0.8 and apache benchmark Version 2.3 while ab -c 100 -n 100000 url ...
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2k views

Sysbench on Redhat 7 Errors with Mysql Testing - PANIC: unprotected error in call to Lua API (cannot open oltp: No such file or directory)

When testing the mysql benchmark using sysbench on redhat 7: sysbench --test=oltp --oltp-table-size=1000000 --mysql-db=test --mysql-user=root --mysql-password=yourrootsqlpassword prepare I'm getting ...
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144 views

Weird results of filesystem benchmark (bonnie++, VPS)

I wanted to check the performance of filesystems of my newly purchased VPS and compare it to the old one, the results surprised me though and I don't know how to analyse them. I picked bonnie++ to ...
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1answer
85 views

Better stream performance when transparent hugepages are on

On rhel 7, when transparent hugepages are activated, I get a better stream benchmark performance than when transparent hugepages are off. Do you have any idea of a kernel parameter (or another thing) ...
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1k views

Using Apache Bench with different post data per request

I'm looking to use ab to obtain some performance metrics on my site. I'm looking to send POST requests to my desired URL, however I'd like to change the values for the POST params for each request. ...
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1answer
34 views

How do you go about comparing two servers in order to figure out how many of one, you could replace with a newer one? [duplicate]

How do you go about comparing two servers in order to figure out how many of one, you could replace with a newer one? In particular, I have the following Old server: ProLiant BL460c G6 (1.86 GHz, ...
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86 views

Synology NAS X-Fer Speed Possible Issues

I recently purchased a Synology DS1815+ 8-Bay NAS for my organization and I have been running benchmarks all morning. I purchased: 4 x 4TB 7200RPM HGST NAS (Enterprise) drives & 2 X 256GB ...
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119 views

Strange behavior of web stress tests

After some server configuration, i decided to do a stress test using siege. 2 front servers in lxc containers, load balancing nginx - on the host machine. (if need, I add nginx and sysctl configs ...
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1answer
170 views

How to configure Fio to a more accurate result of IOPs

I am using fio to test how much iops my server can offer. My conf file says to write a 20GB file and read it. THe results show iops=27291. But the test last only 10 seconds. I wonder if the test last ...
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1answer
85 views

How to find what's causing Apache/httpd to run at such high memory usage

I'm having one site that when hit with a spider just goes off the handles. Normally everything seems fine. We have a nagios montior to report back when CPU is over 80%. When we get the warnings, I ...
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216 views

How to verify network quality before running important benchmarks?

I have multiple CentOS servers around the world. They all are running a PHP script that tests the latency of some services once per minute. The problem is that sometimes these servers have local ...
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38 views

Benchmarking websites via a browser to check loading times of a server?

I'm looking for a benchmarking tool to help find out the loading times of a website, I what to be able to run it like 250 times automatically to work out if a series of changes improves things or not. ...
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1answer
264 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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638 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 ...
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5k 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
1k 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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174 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
4k 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
205 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
28 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. ...
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3answers
5k 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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1answer
15k 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
37 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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1answer
617 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 CIS,...
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139 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
193 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
360 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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2answers
2k 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: multi-...
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1answer
117 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
818 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
171 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
583 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
534 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 ...