Tagged Questions

Performance tuning is the process of modifying a system to improve its efficiency. This is also known as optimizing.

learn more… | top users | synonyms

3
votes
4answers
948 views

How can I make this setup faster?

Hey StackOverlow Community, I currently am using some software that stores a bunch of XML files. All the files are under 25k bytes. The makers of the software state the performance is based on ...
7
votes
3answers
4k views

What are your tricks for optimizing your Subversion configuration?

For a Linux or Windows system, what tricks do you do to optimize your Subversion server? The following are my current tricks for a Linux system serving over Apache with HTTPS and backed by Active ...
10
votes
2answers
37k views

Tuning (and understanding) table_cache in mySQL

I ran the excellent MySQL performance tuning script and started to work through the suggestions. One I ran into was TABLE CACHE Current table_cache value = 4096 tables You have a total of 1073 ...
1
vote
5answers
200 views

Network Monitoring and Filtering [closed]

As the IT administrator for my company I have been tasked with deciding what traffic to filter, shape, and othewise monitor on our network. What protocols, applications, and other network traffic do ...
2
votes
1answer
211 views

Outbound HTTP performance tuning recommendations

I'll detail my exact setup below, but general recommendations for a better web-browsing experience will be useful. A nice checklist of things to try would be great! I have 600 users on a single site ...
0
votes
1answer
1k views

How to use oprofile to find the bottle-neck of our web server?

Updated: ================================================================ I finally found the reason with oprofile. It was because the routing cache of Symfony. We have lots of pages with different ...
91
votes
4answers
124k views

FreeBSD performance tuning. Sysctls, 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 ...
3
votes
6answers
1k views

MySQL performance tuning

I'm looking for a succinct list of common pitfalls and optimizations for tuning a MySQL server as used for mid-size websites. In general, the type of advice I'm looking for here is information that ...
2
votes
3answers
4k views

How can I improve NFS performance on a gigabit LAN?

I have a Solaris 10 server with a Mac OS X clients on a gigabit LAN. The Solaris server exports a RAID-Z backed NFS share and all the clients connect to it. However, transferring files is slower ...
14
votes
7answers
26k views

yslow says etags are misconfigured. how to configure etags properly on IIS7?

running ySlow on a website I support, I noticed it reported that the etags are misconfigured for the site images (e.g. *.jpg, *.png, *.gif). Can anyone help explain what I have to do to get IIS7 ...
1
vote
1answer
750 views

Virtual server freeze (apache ?)

I rent a small virtual server at 1und1.de. (Link, but German only) (2GB RAM dynamic, 512MB at least, 20 GB HDD) I choose to run a Ubuntu 8.04 LTS as operating system (64 Bit). I installed apache2 + ...
1
vote
1answer
2k views

How to change the SWAP file disk in Mac OS X?

I have moved my system on andexternal Raid 1 enclosure attachet to my iMac through Firewire 800 (the best an iMac can do ;-( ) ... I'd like to move the swap on the internal disk in order to increase ...
-3
votes
2answers
728 views

What are the optimal tuning values for RHEL 5.3 Xen kernel on a Dell 2950? [closed]

How to do Linux Tuning and Performance? any one has done for xen kernel ?
6
votes
4answers
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 ...
5
votes
2answers
4k views

Faster IMAP searching for Courier IMAP server on Linux

I am looking for tips on improving IMAP search performance using Courier IMAP. The current version is 4.2.1. Unlike in the question "Fast search for IMAP?", I'm specifically looking for server side ...
8
votes
13answers
6k views

Postfix performance

Running postfix on ubuntu, sending alot of mail ( ~ 1 million messages ) per day. loads are extremly high but not much in terms of cpu and memory load. Anyone in a similiar situation and know how to ...
2
votes
6answers
2k views

Looking for comparisons of disk i/o for a dedicated MySQL server

We hired a consultant to help us increase the capacity of our MySQL cluster, and the first thing (almost only thing) he did was to measure the disk i/o speed of our servers. I am interested in a ...
2
votes
1answer
124 views

What resources on OpenVMS Performance Management do you recommend?

I'm looking for details about how to measure OpenVMS performance, such as what all of the different reported statistics mean and how to adjust for them. In particular, I'm currently investigating ...
5
votes
8answers
7k views

Hard Drive Speed: RPM vs. Cache

When trying to choose a SATA magnetic hard drive (not SSD) for high performance for both random and linear access, which should be the primary factor? For example: would a 10k RPM drive with 16MB ...
7
votes
3answers
2k views

NetBackup Multiplexing for Oracle RMAN Backups

My question is... what multiplexing factor in NetBackup is recommended / do you use for Oracle RMAN backups over 1Gb/s management network to LTO3? JB Background: With enterprise backup tools like ...
1
vote
5answers
682 views

Trouble shooting wireless signal performance

I just performed a wireless network scan and my primary wireless route broadcasts a consist 70 DBm signal. I added a range extender that increases or decreases the signal 65 DB (Not sure how the DB m ...
0
votes
4answers
270 views

Exchange 2003 I/O Troubles

We have some internal processes that send email to our Exchange 2003 system (on Win2K3 R2 32bit). Recently they have been intermittently failing with various errors -- boiled down they report ...
3
votes
3answers
2k views

Database I/O acceleration using solid state drives

What is the experience improving database performance using solid-state drives (particularly for PostgreSQL databases) such as HP's IO Accelerator? Did you see any marked improvements?
0
votes
3answers
4k views

Oracle tuning optimizer index cost adj and optimizer index caching

What is the correct way to set the optimizer index cost adj parameter for Oracle. As a developer I have observed huge performance improvements as this parameter is lowered. Common queries are ...
2
votes
5answers
1k views

What could be causing memory creep on a VPS?

I've got a VPS package. I cannot log into my lxadmin because it is "out of memory". In HyperVM I see that my VPS is using 240 MB of 256 MB. When I reboot the HyperVM, the memory goes down to 2 MB. ...
3
votes
3answers
886 views

What should I set the initial MySQL Values in My.cnf to for Performance?

I am just setting up my new Linux Ubuntu 8.04 LTS server now, and getting ready for launch. My application is a PHP built application using the Zend Framework, and there is a MySQL heavy site (as are ...
1
vote
3answers
1k views

What program can I use to benchmark network traffic? [duplicate]

Possible Duplicate: How to test real network throughput between two points? Given two computers connected by some network interface, is there a standard tool used by an academics publishing ...
1
vote
2answers
370 views

Is there any way to exclude specific files / directories from SuperFetch?

Overall, I love the SuperFetch feature in Vista and believe it results in hugely noticeable gains in the launch time and overall "snappiness" of the system. However, sometimes it apparently gets ...