Performance tuning is the process of modifying a system to improve its efficiency. This is also known as optimizing.
-3
votes
1answer
98 views
Apache optimization needed [closed]
What is the best values for "worker" if you have very very high traffic? Like 500M page views per day?
I want to test my server with that much traffic but how can i setup to handle that much traffic ...
1
vote
1answer
2k views
Memcached Cluster - better to have 3 smaller instances or 2 mediums ones?
Currently I have 2 small servers in an memcached cluster. We are approaching out limits with them and need to grow. What are the pros/cons or going adding another small instance compared with having 2 ...
4
votes
1answer
488 views
How to remove the pause during JBoss 5.1.0 GA boot between ProfileServiceBootstrap and AnnotationCreator?
I've managed to strip down my JBoss profile enough that it boots in 1.5 minutes. I started with the web profile and started pulling out stuff I didn't need. The bulk of my boot time can be seen here:
...
-1
votes
1answer
281 views
Tuning JavaVM on AWS/EC2
there's some specific tuning JVM configuration for AmazonWS/EC2 building blocks (small, large...)?
Somebody have suggestions for tuning JVM running on these machine profiles?
Regards,
And Past
2
votes
6answers
1k 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 ...
0
votes
2answers
91 views
Server configurations for hosting MySQL database
I have a web application which uses a MySQL database hosted on a virtual server. I've been using this server when I started the application and when the database was really small. Now it has grown and ...
1
vote
2answers
186 views
I'm seeing performance problems with postfix accepting mail when the queue is already large, any suggestions?
I use postfix to do final delivery for a mail system I've written. So this postfix installation only accepts mail from me, and bounces. When the postfix queue is empty, it can accept a piece of mail ...
0
votes
1answer
512 views
Oracle Application Server Performance Monitoring and Tuning (CPU load high)
Oracle Application Server Performance Monitoring and Tuning (CPU load high)
i have just hired by a company and my boss give me a performance issue to solve as soon as possible. I don't have any ...
3
votes
2answers
241 views
Tuning MySQL and Linux to reduce maximum response time specifically
We have a MySQL-based application that is very response time sensitive. A MySQL stored procedure needs to respond on average in less than 10 milliseconds and the maximum acceptable response time is 50 ...
4
votes
1answer
417 views
Ubuntu HTTP latency falling into strange quantiles
I have an Ubuntu 10.10 server with plenty of RAM, bandwidth and CPU. I'm seeing a strange, repeatable pattern in the distribution of latencies when serving static files from both Apache and nginx. ...
0
votes
1answer
206 views
Windows 2003 IIS webserver (testserver) is slow
I have a test environment for my Asp.Net 4.0 web applications. It runs on a Dedicated Windows 2003 Webserver (IIS 6)
But it's slow!
The machine never has 100% cpu and the same for memory. When I run ...
2
votes
2answers
738 views
Apache with prefork model using 1000 MB memory per process
I am currently working on a site which uses Apache running on the prefork memory model. The following is the configuration from httpd.conf
<IfModule prefork.c>
StartServers 30
...
12
votes
3answers
1k views
Building a 1,000M row MySQL table
This question is reposted from Stack Overflow based on a suggestion in the comments, apologies for the duplication.
Questions
Question 1: as the size of the database table gets larger how can I tune ...
-1
votes
2answers
116 views
How to perform Server Performance Audit [closed]
Here is the situation. I am the CIO in my work place. The guy on the management team that get to take decision regarding Techy things. I dont do actual development, but we have an IT service provider ...
0
votes
1answer
429 views
Improving TCP performance over a network with small packet loss
I’m trying to improve my TCP throughput over a “high delay network”, with some packet drops, between Linux machines.
I set tcp_mem, tcp_wmem and tcp_rmem to “8192 20530752 20530752”.
I set rmem_max, ...
0
votes
4answers
295 views
Increase application performance on Amazon AWS
I've got a client with an MVC v1 (.NET) application running on a micro instance. On this instance, I've got .NET, IIS 7.5, and MS SQL Server 2008 running to handle the application. The client has ...
1
vote
1answer
444 views
How Do I Troubleshoot Exim Mail Retry Issues?
My server is encountering high CPU load (like almost pegged at 100%) so much that the Apache service can't run and we get Apache 500 errors. We used a script to catch this and this is where we ...
1
vote
1answer
537 views
Windows Server 2008 File Server Performance Tuning
I am running a Microsoft Windows Server 2008 R2 File Server on our network. It seems that there are many times where accessing the data from the server is really slow, sluggish, or non-responsive. ...
3
votes
1answer
1k views
what does locked % in mongostat mean?
When running mongostat to look at our mongo database, I'll frequently see the locked % number jump up, sometimes as high as 80%. Here's a few example rows:
insert query update delete getmore ...
2
votes
4answers
4k views
Find out which task is generating a lot of context switches on linux
According to vmstat, my Linux server (2xCore2 Duo 2.5 GHz) is constantly doing around 20k context switches per second.
# vmstat 3
procs -----------memory---------- ---swap-- -----io---- -system-- ...
0
votes
1answer
237 views
Trim out useless apache modules
I'm running a shared hosting environment with about 100 sites - I just took a peek at all the modules apache is loading/using, some of these I don't know what they are or do or if they are useful at ...
6
votes
4answers
4k views
Windows 7 network performance tuning for LAN
I want to tune Windows 7 TCP stack for speed in a LAN environment.
Bit of background info: I've got a Citrix XenServer set up with Windows 2008R2, Windows 7 and Debian Lenny with Citrix kernel, ...
0
votes
1answer
523 views
Increase bandwidth of Linksys WRT54GL (with Tomato inside)
I have Linksys WRT54GL with Tomato firmware installed. When I connect internet cable directly to a computer I can download at about 8 MB/s, however when internet is access through the router maximum ...
0
votes
3answers
620 views
Increase the performance of sort command on a multi-processor Sun Solaris box
I have a bunch of (rather large i.e. >100MB) comma separated files which needs sorting on 4 processor box with SunOS 5.10
Sort appears to run rather slow (minutes)
I am wondering if there is any way ...
2
votes
1answer
83 views
Profiling windows performance
I am used to using profilers for software development. I have had multiple windows pcs which all have slowed down over time, as well as had work PCs become slower. I understand this is probably the ...
0
votes
3answers
658 views
Increasing Postfix Performance for Outbound Mail
We're trying to optimize a Dell PowerEdge 1850, Dual 3GHz procs, 3072MB RAM, running Postfix 2.8.4 and signing mail with OpenDKIM 2.4.1.
iostat -x output is:
avg-cpu: %user %nice %system %iowait ...
-1
votes
1answer
197 views
Linux script to check settings and recommend tuning changes? [closed]
I'm searching for a script to run on our linux server and recommend various tuning changes we might consider making, as well as their suggested values for consideration. Any ideas if something like ...
5
votes
1answer
2k views
Interpreting ethtool Coalesce output
Other than tx and rx being the transmit and recieve, can anyone explain what the fields mean in ethtool -c's (Coalescing output) and what effect they have on how coalescing works?
Coalesce parameters ...
1
vote
2answers
148 views
SQL performance, how to exactly measure bottlenecks
Yesterday me (programmer) and one of my coworkers from our Hosting department started series of tests to address performance issues with our websites. We are running a server with Windows Server 2008 ...
0
votes
2answers
97 views
what to check for limitations if a linux machine maxes out at a certain connection/s
I have a linux machine with a dummy HTTP server on it. It accepts a certain number of connections/second. Neither the CPU (it is a multicore) nor the memory nor IO are exhausted. What else can be ...
2
votes
1answer
949 views
Very long (>300s) request processing time on Apache Server serving static content from particular IP's
We are running an Apache 2.2 server for a very large web site. Over the past few months we have been having some users reporting slow response times, while others (including our resources, both on ...
0
votes
1answer
519 views
MySQL Memory usage
Our MySQL server seems to be using a lot of memory.
I've tried looking for slow queries and queries with no index and have halved the peak CPU usage and Apache memory usage but the MySQL memory stays ...
0
votes
1answer
353 views
IIS6 - Classic ASP - “out of memory”/“out of string space”
We have a classic ASP application that's under significantly more load than usual.
We are from time to time been getting "out of memory" and "out of string space" in the httperr. We do not usually ...
0
votes
0answers
397 views
Cannot enlarge MySQL Innodb_Buffer_Size, causes MySQL to crash
I currently have innodb_buffer_size set to 2GB - yet I have well over 5GB of innodb databases, and another 4 gigs of free ram on the server (Centos 5). I tried to increase the value to 3 gig, but ...
2
votes
2answers
126 views
Does deleting unused files such as images, javascript, xml, html, asp etc make your Windows Server faster?
I have an IIS7 Windows 2003 Dedicated server.
I just wanted to know if I delete old files such as
XML, HTML, ASP, PHP, images, CSS, JavaScript.. etc.. files that are no longer used..
Does this ...
1
vote
2answers
505 views
Diagnosing poor performance on IIS / ASP.NET / MSSQL app
I'm trying to diagnose the cause of poor performance from a third-party web application we've deployed; the environment is:
ASP.NET on IIS, Windows 2003 Server
SQL Server 2008 on a separate Windows ...
5
votes
2answers
3k views
Best sysctl.conf configuration for high load - extremely busy content streaming server
What is the best sysctl.conf configuration for a high load, extremely busy content streaming server ?
The server fetches the content from remote servers like amazon, s3, etc. then uses php to ...
3
votes
2answers
1k views
How to adjust MySQL performance
I'm facing a real problem with MySQL instance for a service online.
We use hibernate and c3p0 pool with these settings:
c3p0.max_size=200
c3p0.min_size=5
c3p0.timeout=60000
c3p0.max_statements=20
...
1
vote
1answer
440 views
Why is MySQL table_cache full but never used
I have been using the tuning-primer.sh script to tune my my.cnf settings. I have most things working well but the part about TABLE CACHE makes no sense:
TABLE CACHE Current table_cache value = 900 ...
3
votes
2answers
390 views
PostgreSQL tuning recommendation for large server and dataset
I'm working with a PostgreSQL (8.1) server on a dedicated machine with 64 GB of RAM and a fast RAID disk. The data set itself is pretty huge -- we have several tables around 200 GB, more in the 50-100 ...
1
vote
2answers
115 views
How to connect an Oracle server between two countries and maintain high speeds for read & write
Our company has two branches, one in Malaysia and the other one in India. The problems occur when we try to share one of our Oracle environments to our branch in India; the connection is very slow, ...
1
vote
2answers
418 views
Troubling AB benchmarking result?
I'm a real noob when it comes to sys admin. I'm running an app on an EC2 MicroInstance.
Before I launch publicly, I want to make sure that I hit a minimum level of performance. I'm trying out some ...
0
votes
4answers
289 views
Trying to scale my dedicated server for high traffic
I have a quad core xeon, 8GB ram, and only 2 x 1TB SATA drives right now. I am trying to figure out how to scale my application to handle as much load and traffic per day as possible. I have an ...
1
vote
2answers
415 views
Establish a performance baseline for terminal server windows machines
I need to establish a performace basline for our Terminal Server machines.
i plan to use perfmon , and will have a SCOM server on the site very soon.
The terminals are used as a desktop environment ...
18
votes
7answers
5k views
Is it OK to run perfmon on production servers? And why?
Or should perfmon be limited to a Dev/QA server with load tests that simulate production activity?
I'd like to run perfmon for two days (like Sql Server master Brent Ozar suggests) to get an overall ...
0
votes
1answer
482 views
MySQL hosting: What are the recommended specs and w
I have two specific cases of MySQL hosting.
1) I have a case where I have 2000 plus concurrent users to a single MySQL Database. They are not simple web users, but actual business users who need to ...
0
votes
1answer
233 views
IIS 7.0 - responses throttled to 500ms blocks?
Scenario: ASP.NET MVC wep app sitting on my local machine (Vista Ultimate, IIS 7.0), nothing going on except one user (me) logged in and viewing an index page. The page includes 9 dynamic images drawn ...
3
votes
2answers
1k views
How can I tell which page is creating a high-CPU-load httpd process?
I have a LAMP server (CentOS-based MediaTemple (DV) Extreme with 2GB RAM) running a customized Wordpress+bbPress combination .
At about 30k pageviews per day the server is starting to groan. It ...
2
votes
5answers
246 views
Figuring out what's causing a server to slow down
I have a potential client that has a php site that performs fine most of the time. However, every week or so, it will experience lag (slow page loading). I am sure there are a myriad of things that ...
2
votes
1answer
216 views
Do IIS App Pools using Network Service account share memory?
We're trying to tune our IIS farm, and I'm trying to get my head around how Windows allocates resources in our current setup.
We have a pretty standard layout. We host 30+ ASP/ASP.NET sites on our ...
