Performance tuning is the process of modifying a system to improve its efficiency. This is also known as optimizing. Typically performance tuning refers to a computer application, but the same methods can be applied to other complex systems. The system can be a single computer program, a collection ...
1
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1answer
37 views
ApacheTop like tool for Nginx for measuring hit contents?
Are there ApacheTop like tool for Nginx for measuring hit contents?
I want to find out the most popular URL from the web server log (Nginx)
4
votes
1answer
108 views
ratelimit POST requests
Im running a large wordpress multiuser site. I have a varnish cache infront of the wordpress application server. As it make no sense to cache POST requests, i am vulnerable to DOS using lots of POST´s ...
0
votes
1answer
34 views
Server stops responding without any load, restart required
Sever is working as a very high-traffic application back-end
We are using Apache2, MySql, and PHP.
We have already optimized the above for best performance
Server configuration is:
Linux ...
0
votes
2answers
67 views
How can I configure Apache to use more of my CPU?
Apache threads are stacking up on one of my web servers (300-500 simultaneous requests, some taking 3-8s to process!), but CPU usage is very low (~10%). Page load time is slowing way down as a ...
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votes
1answer
59 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
117 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 ...
-1
votes
1answer
41 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
0
votes
1answer
170 views
NGinx vs Varnish as a reverse proxy in front of Apache w/php
I am using apache with mod_php to serve content. Mostly the content is fetched form memcache over the network. All of my images, css and js are already on a cdn
What are the pros and cons of putting ...
0
votes
2answers
59 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
55 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
47 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 ...
0
votes
1answer
47 views
httperf hangs when using --hog
I'm using httperf from a large ec2 instance with ubuntu 10.04 (no other software installed).
When I test without --hog the tests run however when I use --hog the tests never end
3
votes
2answers
92 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 ...
3
votes
1answer
116 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
79 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
158 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
...
0
votes
1answer
149 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, ...
9
votes
3answers
304 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 ...
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votes
2answers
77 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
100 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
117 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. ...
2
votes
1answer
268 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 ...
0
votes
1answer
72 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 ...
0
votes
1answer
184 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
175 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 ...
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votes
1answer
122 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 ...
1
vote
1answer
162 views
How to check for bottlenecks in Windows Server 2008 R2
I recently switched out a 10 year old server for a brand new server in a small office and upgraded from Windows Server 2000 to Windows Server 2008 R2. After the switch was complete and some ...
1
vote
3answers
275 views
How to speed up apache
We have a server with 8Cores, 16GB of RAM and RAID 0 SAS 10K drives. Our goal is to use this to serve a fairly simple php application quickly. We have tested all other components and we think we have ...
1
vote
2answers
75 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
1answer
114 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
1answer
181 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
4answers
130 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 ...
0
votes
0answers
165 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
65 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 ...
4
votes
1answer
425 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 ...
3
votes
2answers
289 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
...
3
votes
2answers
148 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
72 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
177 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 ...
1
vote
2answers
118 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 ...
0
votes
4answers
181 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
1answer
208 views
InnoDB options crashing mysql start AND mysql tuning
I have an innodb on a Ubuntu 10.10 server running on an ESXi platform. I have dedicated 8 CPUs, 32 Gigs of ram, and files stored in a Raid 5 HP SAN of SAS 10k rpm disks. I'm expecting FAST queries! ...
0
votes
2answers
183 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 ...
2
votes
5answers
131 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 ...
0
votes
2answers
67 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 ...
0
votes
5answers
527 views
Very low performance of raid6
I noticed that writing to raid-6 is very low, but when I make tests with hdparm the speed is reasonable:
dd if=/dev/zero of=/store/01/test.tmp bs=1M count=10000
Gives: 50Mb/s or even less.
The ...
2
votes
1answer
74 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 ...
2
votes
5answers
256 views
Does Overclocking Anything Shorten It's Life? [closed]
From a business standpoint...
If intel could take a 3.0 GHz CPU, and overclock it to 4.0 GHz - whilst still covering their warranty they would do so. It's absolutely free and makes the chip perceived ...
5
votes
2answers
807 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 ...
1
vote
1answer
183 views
COM+/Desktop Heap errors in IIS affecting sites at random?
We have a Win2K3 server that is hosting 30+ sites. Each site is configured to have its own unique application pool -- so that we can manually recycle specific sites if needed and not kill sessions ...
