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

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1answer
243 views

Internet Speed for Webserver

That should be kind of dumb question in comparison to all other questions here. What minimum upload and download is required for a small home webserver with one webpage? Or is there a schema that ...
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2answers
184 views

Database Performance Across 3 NetApp FAS2050

I recently inherited a SQL Server 2005 box that has LUNs mounted on it from three different NetApp FAS2050 filers. The reason there are three is because the first two filers are out of space and our ...
4
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2answers
175 views

Storage sizing for virtual machines

I am currently doing research to determine the consolidation ratio my company could expect should we start using a virtualization platform. I find myself continually running into a dead end when ...
1
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2answers
137 views

Overnight SQL Server Full Backup taking 4x longer, everything else slower, RAID problem?

Sql Server on Windows Server 2008: Overnight, fullbackups taking 7-10 hours instead of 1-3 transaction logs taking 4-5 minutes instead of 1 minute Query optimization taking 3x longer I'm feeling ...
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5answers
5k views

Improving VPN performance - stronger encryption = more performance?

I have a site-to-site VPN set up with two SonicWall's (a TZ170 and a Pro1260). It was suggested to me that turning off encryption (so the VPN is tunneling only) would improve performance. (I'm not ...
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2answers
265 views

Zabbix machine is going crazy with HD writes!

I recently installed Zabbix on a Ubuntu box I had sitting around. It's only monitoring 2 servers but I've noticed that it's continuously smashing the HD with writes. I don't remember Zabbix being this ...
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2answers
1k views

use of tcp_delack_min on redhat linux (kernel 2.6.18)

we're moving from Solaris to Redhat Linux, and trying to duplicate our low-latency setup, that, on solaris, includes the ndd settings related to TCP NO DELAY, and NAGLE ALGORITHM. I got the impression ...
24
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11answers
18k views

Is virtual machine slower than the underlying physical machine?

This question is quite general, but most specifically I'm interested in knowing if virtual machine running Ubuntu Enterprise Cloud will be any slower than the same physical machine without any ...
1
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1answer
224 views

Compression without Mod_Deflate

Greetings all, After running tests with Google PageSpeed, I believe my site could really benefit from compressing js/html/css/php files. Unfortunately, my host (Host Gator) does not support Mod_Gzip ...
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2answers
172 views

mysql settings - using the available resources

I've got a lot of processing work I need to run on a mysql server. I've installed mysql 5.1.45-community on a Win 2008 64bit. Its running on a Xeon, 3ghz 6 processors with 8 gig ram. It doesn't ...
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3answers
3k views

Debian tuning for increasing read/write buffer

Is there a way to modify Debian settings so the memory could be used more for disk read/write caching ? I am already using RAID 0 but thats not enough for multiple users, and the disk is almost ...
3
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3answers
228 views

Losing SQL connections

sql servr 2005 - Standard; one dedicated sql server (VM); windows server 2003; Small databases; About once a week we lose all sql connections. It seems to fix itself after about 5-10 minutes. ...
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2answers
422 views

Disk fragmentation when dealing with many small files

On a daily basis we generate about 3.4 Million small jpeg files. We also delete about 3.4 Million 90 day old images. To date, we've dealt with this content by storing the images in a hierarchical ...
1
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3answers
360 views

Why does Kerberos need Ticket Granting Server?

It's probably something fundamental but I can't find a certain statement. Why can't KDC authenticate then provide the service ticket directly. Is it about security or performance or some other thing? ...
2
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4answers
1k views

Linux testing - CPU & disk

I am a bit rusty lately. What is the standard way to test CPU and disk I/O these days?
2
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1answer
285 views

optimizing operating systems to provide maximum informix performance

Are there any Informix-specific guides for optimizing any operating system where an ifx engine is running? For example, in Linux, strip-down to a bare minimum all unecessary binaries, daemons, ...
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3answers
2k views

Methodologies for performance-testing a WAN link

We have a pair of new diversely-routed 1Gbps Ethernet links between locations about 200 miles apart. The 'client' is a new reasonably-powerful machine (HP DL380 G6, dual E56xx Xeons, 48GB DDR3, R1 ...
0
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1answer
333 views

SSRS 2008 Resuming from Sleep

Does anyone know a way to prevent SSRS 2008 from sleeping, after not being used for a while (not sure of the time-out) it takes quite a while to wake up, which is causing a timeout issue?
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2answers
2k views

Office 2007 running under Windows 7 is slow to save files to network

Saving an Excel or Word 2007 file to a network share is very slow in Office 2007. It might take as long as two minutes two save a 100kb file. What could be causing this? The network share is hosted ...
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3answers
553 views

ApacheTop and Plesk

I am trying to find a way to monitor my apache server so I can see which domain is causing slow down on my server when they occur. I was hoping I would be able to do it with ApacheTop but I have to ...
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3answers
110 views

how to speed you php site? [closed]

Hello Google begans to rank sites with the speed each site loads. So how can i increase the speed of a php mysql site ? I am already Gzip compression
2
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3answers
2k views

Terminal server performance over high latency links

Our datacenter and head office is currently in Brisbane, Australia, and we have a branch office in the UK. We have a private WAN with a 768k link to our UK office and the latency is at about 350ms. ...
3
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2answers
546 views

Sysadmin 101: How can I figure out why my server crashes and monitor performance?

I have a Drupal-powered site that seems to have neverending performance problems. It was butt-slow about 5 months ago. I brought in some guys who installed nginx for anonymous visitors, ajaxified a ...
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2answers
1k views

Optimizing PHP<>MySQL performance

I am trying to optimize my PHP<>MySQL on this test script: <? for($i=0;$i<100;$i++)//Iterations count $res.= var_dump(loadRow("select body_ru from articles where id>$i*50 limit ...
2
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3answers
172 views

Operating system for optimal performance on x86 (virtualized)

What operating system would achieve the best performance on x86 from within Qemu or Virtualbox? I only need to use a handful of programs regularly: tmux, vi(m), curl, a package manager (mainly to ...
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3answers
1k views

How to test server throughput

I've always used apache benchmark to try to get a rough idea of how many requests/second my server can handle. I read that it was good, and it seemed to work well. Enter node.js, which is fully ...
2
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1answer
2k views

HP DL185 - very slow disk read speed

I have a HP DL185 G6 Server (12 disk model) with the following spec: Quad Core Xeon 2.27GHz 6GB RAM HP P212 RAID controller with battery backup 2 x 128GB 15K SAS 3.5" (RAID-1 for the operating ...
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2answers
333 views

Question about network topology and routing performance

I am currently working on a uni project about routing protocols and network performance, one of the criteria i was going to test under was to see what effect lan topology has, ie workstations arranged ...
3
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2answers
574 views

VMWare Server - Writing files to virtual hard drive performance

We have just moved our infrastructure from physical servers to virtual machines. Everything is running great and we are happy with the result of the move. We have identified one problem, and that is ...
3
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3answers
469 views

Server nearly unusable when doing disk writes

My question closely relates to my last question here on serverfault. I was copying about 5GB from a 10 year old desktop computer to the server. The copy was done in Windows Explorer. In this ...
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2answers
564 views

How to aggregate data in Windows Performance Monitor?

I have seem performance counters like this: PhysicalDisk(_Total)\Avg. Disk Read Queue Length Which is an aggregation (average, sum, etc) of data over a period. How to create a custom counter which ...
6
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3answers
3k views

Apache + Tomcat VS Stand Alone Tomcat or GlassFish

I am setting up a Debian server to serve Java web applications. I have done quite a bit of research for several weeks now. Tomcat's web site says it is better to use stand alone Tomcat for speed if ...
1
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2answers
254 views

Troubleshooting a high SQL Server Compilation/Batch-Ratio

I have a SQL Server (quad core x86, 4GB RAM) that constantly has almost the same values for "SQLServer:SQL Statistics: SQL compilations/sec" and "SQLServer:SQL Statistics: SQL batches/sec". This could ...
21
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10answers
17k views

How to make `rm` faster on ext3/linux?

I have ext3 filesystem mounted with default options. On it I have some ~ 100GB files. Removal of any of such files takes long time (8 minutes) and causes a lot of io traffic, which increases load on ...
14
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3answers
12k views

GlusterFS vs Ceph, which is better for production use for the moment? [closed]

I am evaluating GlusterFS and Ceph, seems Gluster is FUSE based which means it may be not as fast as Ceph. But looks like Gluster got a very friendly control panel and is ease to use. Ceph was ...
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3answers
1k views

Can a SQL Server have a CPU bottleneck when Processor Time is under 30%

Is it in principle possible for the CPU to be the bottleneck on a SQL Server if the Performance Counter Processor:Processor Time is constantly under 30% on all cores? Or does low Processor Time ...
14
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2answers
11k views

limit linux background flush (dirty pages)

Background flushing in linux happens when either too much written data is pending (adjustable via /proc/sys/vm/dirty_background_ratio) or a timeout for pending writes is reached ...
1
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2answers
305 views

Is 30 calls / second a lot for one IIS server?

We have a RIA application that 300 clients concurrently use in an intranet environment. Together they make 30 calls / second to IIS (asp.net) (actually it's 60 but calls are loadbalanced over two IIS ...
2
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2answers
495 views

Dell OpenManage Causing Periodic Slowness

Today we diagnosed the cause of a Periodic slowness issue: see here. Dell OpenManage Server Administrator seems to have been causing hourly slowness. It would occasionally peg one of the CPUs for ...
1
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2answers
1k views

MySQL: Load database to memory

Is there a way to load an entire MySQL database to the RAM, especially on en EC2 server? The database is quite small (~500 MegaBytes) I have enough memory Speed issues are crucial - the resulted ...
1
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2answers
98 views

Windows XP IIS5 performance across Network

Does Windows XP with IIS5 need any extra configuration to be suitable as a web server? I'm not considering using this for anything other than a web server on a small network for testing development ...
2
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3answers
694 views

MySQL : table organisation for very large sets with high update frequency

I'm facing a dilemma in the choice of my MySQL schema application. So before I start here is a picture extremely simplified of my database : Schema here : http://i43.tinypic.com/2wp5lxz.png In one ...
4
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3answers
236 views

How would I recognize the “spoon-feeding problem” on a dynamic webapp server?

The "spoon-feeding problem", as it was recently explained to me, happens when connections to your application server are tied up feeding data across slow network connections to your clients. This ...
2
votes
1answer
260 views

Hyper-V R2 Performance Counters

I've been playing around with the WMI performance counters for Hyper-V. Of interest to me are the Virtual NIC bytes/sec input and output counters. I notice that the results are very "spikey". Over ...
6
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8answers
2k views

SQL Server slow in production environment

I have a weird problem in a customer's production environment. I can't give any details on the infrastructure, except that SQL server runs on a virtual server. The data, log and filestream file are on ...
4
votes
1answer
557 views

how does a web application cope with thousands of requests?

I went to a few websites and noticed that they all use AJAX technology for many tasks such as chat, messages, and so forth. They use a lot of httprequests obviously. My question is if you build a ...
4
votes
5answers
4k views

Tracing slow Java I/O in Solaris 10

We have a Java application which is significantly slower in Solaris 10 server than in Windows PC. We have profiled (-Xprof) the application and observed that UnixFileSystem.getBooleanAttributes0 ...
2
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1answer
1k views

RHEL raw device (over VMware RDM) performance issues

I'm running RHEL 5.3 over vSphere 4.0U1. I configured multiple LUNs on my NetApp (Fibre) storage, and added the RDM on two (Linux) VMs, using the Paravirtual SCSI adapter. One LUN is 100GB in size, ...
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3answers
486 views

how can i increase cpu utilization on a aix unix p5 server

i need to make cpu utilization increase to about 90%
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1answer
71 views

Is it possible to run different mail servers on one server? eg. MailEnable and Kerio mail server

i have just boought kerio mail server and i want to install it together with my current mail server MailEnable. I want to monitor kerio performance before i stop using the current one.