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

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0
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0answers
5 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 ...
1
vote
1answer
817 views

interpreting IOPS these Bonnie++ and iostat results

I am looking to interpret the IOPS from a few runs of bonnie++ using iostat simultaneously and using the benchmarking from this post: Can I determine IOPS on a disk array using bonnie++? bonnie++ ...
2
votes
1answer
1k views

How to achieve multiple NFS/TCP connections to the same server?

I'm trying to maximize the NFS/TCP bandwidth between a Linux client and a single NFS server over a 10Gbps link. Although each NFS mount has its own device (major/minor), everything comes down to a ...
4
votes
1answer
25 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 ...
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3answers
2k views

High disk I/O activity in CentOS server

I have about 16 websites in a CentOS dedicated, and I am having some problems on high traffic hours, it seems to be a high disk I/O activity causing a general slowdown. I've installed atop and this ...
0
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1answer
10 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? ...
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2answers
40 views

Apache Configuration not use server capabilities [on hold]

I have a web server with 16 GB of RAM. The server has a good traffic and have pics of 300 simultaneous requests. Unfortunately when these peaks arrive queries fall into error or are very very slow. ...
1
vote
1answer
56 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 ...
1
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2answers
434 views

MSMQ write taking > 1 minute

We have an ongoing problem with message writes to MSMQ being very slow. Our queue is on Windows Server 2008 SP2. The queue is a public queue, addressed at "servername\queuename". The code to send a ...
-1
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0answers
11 views

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

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
0answers
6 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
25 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 ...
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0answers
149 views

Appropriate fan speed for a Dell PowerEdge T710

We have a DELL PowerEdge T710 in our office and it is really really noisy, the fans sound like vacuum cleaners! The discussion is whether the server is malconfigured and can be made more silent or if ...
4
votes
6answers
749 views

Effect of distance from server on page load speed

I measured the load speed of a static image file severed by nginx from my server (using pingdom service). The server should normally process this request within few seconds. My server is located in ...
97
votes
4answers
131k views

FreeBSD performance tuning: Sysctl parameter, loader.conf, kernel

I wanted to share knowledge of tuning FreeBSD via sysctl.conf / loader.conf / KENCONF / etc. It was initially based on Igor Sysoev's (author of nginx) presentation about FreeBSD tuning up to ...
0
votes
1answer
877 views

Troubleshooting MySQL Performance Issues

Environment: 1 physical machine 8GB RAM some older Core2Duo CPU 1 HDD Windows Vista 64 bit 1 Virtual Machine 16 GB RAM 2 vCPUs Windows 7 64bit Both machines running MySQL 5.5.28 (64Bit) with ...
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2answers
81 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
2answers
1k views

Horrible PHP/MySQL Query Performance On Ubuntu Server 10.04

I just did a clear install of Ubuntu Server 10.04 with the standard LAMP config.. Then I made a small script to test insert speeds into a table with 3 columns. When I run the script on any of my ...
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0answers
22 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
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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
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1answer
1k views

Performance Issue Between SQL and IIS on Seperate Machines

First time OP on serverfault, but an avid user of stackoverflow. We have two high-specification boxes, both running Windows Server 2008 R2 Standard. On one we have IIS 7.5, the other SQL Server 2008 ...
0
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0answers
13 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. ...
5
votes
2answers
2k views

Unable to increase the dynamic port range on Windows Server 2008

I'm trying to "tune" the TCP/IP stack on some Windows Server 2008 machines by following the instructions here: ...
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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 ...
13
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3answers
7k views

How much overhead does x86/x64 virtualization have?

How much overhead does x86/x64 virtualization (I'll probably be using VirtualBox, possbly VMWare, definitely not paravirtualization) have for each of the following operations a Win64 host and Linux64 ...
-1
votes
1answer
20 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. ...
1
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4answers
833 views

Tunning Apache and server for massive photo uploads

I got an Apache webserver running in a EC2 platform. It's receiving a lot of uploads from users (big pictures files). The problem is that immediately after upload I have to convert images to other ...
0
votes
1answer
28 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
26 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

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 ...
3
votes
1answer
313 views

CORAID using only 1 of the 2 available NICs for AoE traffic

We got 6 CORAID shelves in my workplace. On 2 of them I see AoE traffic on only 1 of the 2 NICs that are attached to the SAN switch. We got jumbo frames enabled on all devices. Both NICs show up when ...
1
vote
2answers
1k views

anyone using coraid storage: ATA over ethernet?

can these enclosures be populated with SATA or SAS drives purchased elsewhere? recently Dell has made custom size slots on their PE T710 servers on which you could only place drives purchased from ...
0
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0answers
26 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 ...
7
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3answers
15k views

Xen vs. VirtualBox under heavy load?

Which performs better under heavy CPU and memory usage on the virtual servers, Xen or VirtualBox?
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4answers
2k views

What is the difference between QuadCore and Core2Quad?

In Market there are two types of processors as Core2Quad and QuadCore. What is the architectural/performance difference between two flavours? I have the same question with older Core2Duo and Dualcore ...
2
votes
1answer
3k views

MySQL high CPU usage on small website

I have a small website hosted on a dedicated server (FreeBSD 9.2, MySQL 5.6.1 and php 5.5.5). The problem is that MySQL eats a lot of cpu resources even if the website have a few visitors. The ...
2
votes
1answer
899 views

BackupExec 12 + RALUS - VERY slow backups

We use Backup Exec 12 and the Remote Agent for Linux/Unix Servers (RALUS) to backup a large RHEL5 system. For various reasons we need to do a daily working set job. These working-set jobs run ...
3
votes
5answers
236 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 ...
49
votes
10answers
14k views

How to [politely?] tell software vendor they don't know what they're talking about

Not a technical question, but a valid one nonetheless. Scenario: HP ProLiant DL380 Gen 8 with 2 x 8-core Xeon E5-2667 CPUs and 256GB RAM running ESXi 5.5. Eight VMs for a given vendor's system. ...
0
votes
1answer
11 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 ...
13
votes
5answers
11k views

Process runs slower as a scheduled task than it does interactively

I have a scheduled task which is very CPU- and IO-intensive, and takes about four hours to run (building source code, if you're curious). The task is a Powershell script which spawns various ...
0
votes
0answers
29 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 ...
12
votes
7answers
20k views

How can I disable encryption on openssh?

I'm having performance problems using openshh(server) and putty(client) combination to use a remote webproxy. I'd like to disable encryption and test the results to see if it makes a difference. How ...
0
votes
1answer
1k views

Why is hash join slow in postgresql 9.1?

I transfered my DB from Postgresql 8.4 to new server with Postgresql 9.1. Size of DB is 9.9GB Data directory is situated on ssd 60GB disk. And server has 16GB RAM and 16 proccessor cores. But today ...
1
vote
2answers
1k views

NFS Over OpenVPN: Top Performance Boosters

I have two VPS's - One is running 2008 Server R2 and the other is a Ubuntu 12.04 installation. I am using the Windows VPS for RD sessions for Quickbooks and a couple other apps and using the Ubuntu ...
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 ...
7
votes
5answers
4k views

Configuring NTFS file system for performance

We have an application that is planning to store around 1.1TB of XML files which average 8.5kb in size. These represent a rolling 18 months of data, with around 200,000 new files being created every ...
2
votes
2answers
77 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
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0answers
82 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
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0answers
25 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:\ ...