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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fio numjobs & iodepth Values to Simulate Database PostgreSQL Workload?

I am trying to benchmark a ZFS RAID-10 array of SATA SSDs using fio with settings that are somewhat representative of database workloads like for PostgreSQL. For example, for random reads: fio --...
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Will an E5-2660 be a major improvement over a Q9550 for a webserver?

I have an old production server that runs Debian on a Q9550 CPU. I want to upgrade the server but I am on a very tight budget. I can't spend more than around $600. I can get a refurbished HP ProLiant ...
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55 views

Where is my bottleneck: RAM, CPU or disk?

I have a 32 core, 64 thread, 128GB RAM system with internal SSD. I'm running 64 data mining/simulation jobs in parallel that each load 1GB from disk and run for about 5-10 minutes . I want to know ...
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Quick Way to Evaluate Linux Server Load To Determine if Upgrade is Needed?

I've got mission critical apps running on my VDS. We're not experiencing any visible lag issues from the user perspective. However I want to be cognizant about when it's time to upgrade. The network ...
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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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Benchmark CSVFS performance

I would like to benchmark the performance of a CSV volume. I found a lot of bench-marking applications for drives in general however they does not let me to run the application or select the CSV ...
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1answer
2k views

Litespeed vs Nginx high-traffic server performance? [closed]

Most top-level (high-traffic) websites use Nginx web servers. This community has many members who are experts about systems and servers, so I want to ask for feedback on which server can handle top-...
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Benchmark Azure App Performance

I have an ASP.NET MVC web app running in Azure. I'm making a change to some of the resources it uses in the background but I want to be sure it's not going to have an adverse effect on the ...
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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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166 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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1answer
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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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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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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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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 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
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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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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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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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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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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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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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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
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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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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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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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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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147 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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266 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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174 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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225 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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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
341 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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1answer
857 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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1answer
7k 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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1answer
5k 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
350 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
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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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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 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
38 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
687 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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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
206 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
373 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
3k 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
894 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
186 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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