Questions about server hardware and software performance, or network performance.

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0
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2answers
77 views

email sending speed - how to improve

I am maintaining a server to send email mailings (no spam, of course). The current speed of this machine is approx. 2000 emails per hour. (edit: actually I did a test mailing today, removing the ...
0
votes
0answers
17 views

Apache and JBoss mod_cluster speed up reload

As an alternative to this question, is it possible to decrease the amount of time that it takes for the Apache (httpd) server to pick up the JBoss servers after the Apache server reloads? As of right ...
6
votes
1answer
43 views

postfix performance with lists in main.cf

For defining a list of items to assign to many different options in postfix, you can either use a comma separated list like this: relay_domains = example.com,example.net,example.org or a hash map ...
-1
votes
0answers
12 views

Fastest link between two TP-Link JetStream TL-SG3424P Switches [closed]

I have 2 of these situated approximately 25 meters apart - what's the most performant method of connecting them together - straight CAT 6 or utilising the SFP ports?
0
votes
1answer
15 views

Http proxy server performance analyzing

I have implemented a http proxy client/server. Currently I intended to test performance of this proxy client/server. Can anybody tell me what kind of tests should I take to analyze it's performance? ...
0
votes
0answers
10 views

Loggin request execution time along with requested URL

I'm running a ASP.NET WEBFORMS application on a windows 2012 Server. I need to be able to calculate average execution times for each page in my application. I know the IIS logs have a time-taken ...
0
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0answers
27 views

Determine is VPS is slow just through PING?

I'm running a severe issues on this site and I'm trying to see if the problem is at server side (just if VPS is slow or some kind of miss configuration) or software side (Wordpress). I'm not an expert ...
0
votes
0answers
12 views

How to measure file access by process over time?

I would like to take a sampling of data / file access over the course of several hours or days in order to ascertain what processes (with their accompanying files) are consuming the most drive IO in ...
0
votes
0answers
14 views

How to ascertain where to effectively allocate server resources?

I have recently received an upgrade to one of my servers of a 256GB SSD drive (this is in addition to two other primary 1TB drives) and a memory upgrade bringing the server to 64GB from 32GB of RAM. ...
0
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0answers
22 views

Taking a thread dump on IBM J9 takes a long time

I'm trying to collect a java core on AIX (java version 1.6). There is only one dump agent configured, which collects a system dump, heap dump and java core on every SIGQUIT, so I used HealthCenter to ...
-1
votes
1answer
26 views

Compiling nginx and php

Im about to set up a basic web server based on ubuntu server 14.04 x64 with an online shop section, the server will also consist mysql, mail, and maybe other servers as well until it runs smoothly. ...
0
votes
0answers
28 views

ATM connection has slow upload speed when connected to switch or router

We just got a new additional ATM line with 10/10 Mbps. When connected directly to a PC NIC, internet speed tests all come up as 10/10 Mbps. However, when connected to any of several routers or ...
0
votes
1answer
30 views

6 GB/s SAS RAID 10 (6 Drive) vs. 3 GB/s SAS RAID 10 (14 Drive)

I am running MS SQL 2014 Standard and have a Dell MD 3000i iSCSI SAN. Rough specs: Dell R610 With PERC H700 controlling 6 x 2.5" 15K SAS drives (6 GB/s) Dell MD3000i with 14 x 3.5" 15K SAS drives ...
0
votes
0answers
30 views

How to interpret atop Disk usage and what disk usage is reasonable

I have a a couple of virtual machines all with the same provider. I'm using them for web hosting and have started to get intermittent slow page load times. I've installed atop to try and get to the ...
0
votes
1answer
31 views

Test cloud VM performance

I have a linux VM hosted in a cloud environment. I suspect the provider to do too much overprovisioning with CPU and IO, from time to time. For example postgresql's reports 300ms+ queries that are ...
1
vote
1answer
58 views

What can explain Hyperthreading bringing a server to its knees

In the last year I've had 2 brand new servers that I commissioned where their performance made them unusable. The both servers were Dell R620 servers with 1 processor. One had 6 cores and the other ...
0
votes
0answers
8 views

Poor memory performance on intel avoton?

I have 12 of these supermicro A1SA2-2750F boards that I'm playing around with in order to compare them to Dell's C5220s but I'm seeing consistent poor memory performance. Just curious if anyone's ...
0
votes
1answer
14 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 ...
0
votes
0answers
30 views

Slow sudo response

We have LDAP setup to provide information regarding sudo. The whole system works, but it takes a long time (~10 seconds) for any sudo command to return. For instance if I run strace -f -r -o ...
2
votes
2answers
45 views

Performance tuning world wide?

I am working on a website that is used by people all over the world. Currently we have a web server that is in Oregon and a database sever that is in Chicago. When users from the US access the ...
3
votes
5answers
244 views

Router limits network performance but its CPU load isn't 100%

I'm using a PC Engines APU device running FreeBSD as a NAT router. The setup is very usual: one WAN connection and one LAN connection. Theoretically, WAN connection is 800/40 Mbit/s and the LAN one ...
2
votes
2answers
81 views

Virtualized Server 2003 vs Server 2008 R2 file transfer rate differences?

Basically I am trying to find out where the difference in the rate of a network file copy might come from. I have a virtual Server 2008 R2 SP1 and a virtual Server 2003 R2 SP2, using the same store, ...
0
votes
0answers
85 views

Windows Server 2012R2 benchmark [duplicate]

i hope you can help me. I have got this task to "characterize" and benchmark performance on our new server setup we have at a hosting center. Basically it is 2 HP ProLiant DL380p Gen8, 3.00 GHz, ...
1
vote
0answers
27 views

Performance issues with cross-drive NTFS junctions

I have the following setup: Windows 8.1 32-bit Drive 0: system drive, SSD, NTFS, mounted at C:\ Drive 1: data drive, magnetic HDD, NTFS, mounted at C:\Users\Database User\Documents and Z:\ ...
0
votes
0answers
28 views

How efficient is the tac command on large files

The taccommand (catreversed) can be used to read a file backwards, just like cat reads it rom the beginning. I wonder, how efficient this is. Does it have to read the whole file from the beginning and ...
0
votes
0answers
29 views

MongoDB hogging IO but it doesn't show in mongotop or mongostat

Iotop says mongod is using a lot of IO (96.32%) for a long while but mongotop and mongostat show a bunch of zeros. How can I better monitor mongodb and find out what's happening?
1
vote
2answers
92 views

Slow serving of static files with IIS 8

We're hosting an ASP.Net MVC web app on Windows Server 2012, which runs over HTTPS. Most of the time everything is nice and fast, but we've noticed that about 1 in 50 requests for static files (e.g. ...
1
vote
0answers
59 views

finding if my linux server is the bottleneck

I have a redhat linux 6.x server being used for writing of backup images by NetBackup before being dedup to tape library. currently, I have at least 20 servers writing to it every time their backup ...
0
votes
0answers
36 views

Counterintuitive drop in CPU

I am running a memcached service in a linux container pinned to a specific physical core. As expected the CPU increases when the number of requests increase. The requests are sent from a workload ...
1
vote
1answer
25 views

Does it make sense to remove NFS from a simple web server?

Does it make sense security- and performance-wise to remove NFS on a simple server which has ~10 Wordpress websites? Or is simply stopping the services enough?
2
votes
1answer
44 views

Parallel Processing and Disk IO for performance. More cores or more servers?

I have a large analysis job on an AWS EC2 instance (c3.8xlarge) on Ubuntu 12.04. The objective is to load the server at 100% CPU, running as many jobs as memory allows (varying amounts but generally ...
0
votes
1answer
81 views

How to determine performance improvement from precompiling ASP.NET site?

I have an ASP.NET (non-MVC) site that is deployed to IIS. I've setup the precompile options (for deploy/publish). Settings are below in the image. I've tried a variation of the settings below and from ...
0
votes
0answers
37 views

Strange performance issues on CentOS KVM guests

I have a very basic hypervisor server. It is based on consumer hardware and does have some quirks, so I'm not excluding hardware issues. Guests on this machine have strange performance issues, it ...
1
vote
1answer
75 views

Linux fixed file size copy from Windows Server 2012 NFS share

Company is in the process of switching from hosting MongoDB on windows server 2012 to hosting on linux(ubuntu 14.04) Current backup and restore strategy involves copying all the data files via ...
4
votes
2answers
776 views

Which CentOS Version Should I Use?

I have some used rackmount servers (Dell R610, HP DL180 G6, HP DL360 G5) that I intend to use for on demand video streaming in a colocation environment. I would like to have them all on the same OS to ...
0
votes
0answers
14 views

Troubleshooting Rails 3 application performance problems

We deployed some apps upgraded to Ruby 1.8.7, Rails 3.1.11 on Dec. 30 (i know, we're in perpetual upgrade mode, targetting Ruby 1.9.x now..). One of the apps' performance has been poor since then, ...
2
votes
2answers
371 views

What does RXTX Factor mean, what is it and how does it affect my server?

In the Rackspace overview for their next gen servers they have a table of flavor options. In the table there is a column called RXTX factor with no explanation. I tried googling, but couldn't find ...
0
votes
1answer
31 views

Measuring request response time by port

So, I'm currently working on a project in which I spin up a set docker image on a number of different machines and configurations. This image basically contains a web server that accepts a number of ...
0
votes
0answers
40 views

Python libraries slow to load from NFS mount point

Several of our computers are diskless, and they load their Python libraries from an NFS mount point across the network. This means it can take up to three minutes to start up a Python process that ...
4
votes
1answer
74 views

psping to localhost - improve throughput

I'm using following psping command to measure the bandwith throughput for localhost on a physical server psping -4 -b -l 8k -n 20000 localhost:1234 The throughput is around 150MB/s wich isn't all ...
1
vote
1answer
356 views

ssd performance against hdd performance

I have two server, one with a SSD, one with a HDD. I've been running hdparm to see the differences, but the results for Timing cached reads and Timing are quite equal/HDD is faster: SSD: Timing ...
0
votes
2answers
70 views

TCP - TAP performance

Linux. Is there a performance loss from using a tap device vs a hardware one like eth0 ? The goal is to create a user space tcp/ip stack and avoid the kernel as much as possible. I would like to be ...
0
votes
0answers
31 views

Performance Monitor Single W3WP

How to set my counters in perfmon to track a single W3WP process?
1
vote
2answers
109 views

Performance Tuning Linux [closed]

Performance Tuning/ Monitoring/Latency keeping in mind I see following 4 items & in each item they are lot of tools. CPU Memory IO Network What I see following tools we do use. vmstat mpstat ...
0
votes
1answer
72 views

UFS wedge : “Out of journal space!” - how to tune? (FreeBSD)

I'm running FreeBSD 9.2p13 with UFS and journaled softupdates. Does anybody know how to tune softupdates journal on UFS? There are no suitable information in handbook, man pages or sysctl ...
2
votes
1answer
107 views

Azure IO performance sql server [duplicate]

We are in the process of migrating our on-premises sql server to Azure and I am having trouble with the IO performance. I have created a new D14 instance and attached 16 virtual disks at 100GB in ...
1
vote
1answer
145 views

Apache CentOS Server very slow! Wrong configuration?

I have a problem with server overload on a Apache configuration 8gb of RAM 1and1.com Virtual Server. Server gets extremely slow once it reaches 100+ active users (according to google analytics) during ...
0
votes
0answers
81 views

Packet loss between windows guest and Ubuntu 14.04 host

We are seeing packet loss between one of our Ubuntu 14.04 hosts and a KVM guest running Windows 2008 R2. The loss only shows up at high loads. Similarly loaded machines running 12.04 do not exhibit ...
1
vote
1answer
46 views

Read performance of old LTO-2 tape

I have a stack of old LTO-2 tapes, and my task is to save the contents as large binary files on disk for eventual consolidation on newer media. (The contents are in a custom format specific to this ...
0
votes
1answer
103 views

Improve openvpn bandwidth Debian 7

I configured openvpn on a dedicated server. Things are working fine but the bandwidth is not as high as it should be given the network specifications : The dedicated server has 250Mbps DL speed and ...