Questions tagged [performance-tuning]
Performance tuning is the process of modifying a system to improve its efficiency. This is also known as optimizing.
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Windows Server 2008 R2 poor CPU performance
We have two identical servers with the following specs:
4 sockets containing AMD Opteron 6172 at 2.10 GHz each of which have 12 cores
64 GB RAM
One runs Windows Server 2008 R2 Standard, which ...
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performance wise htaccess
hese's the my htaccess template, i wonder if anything could be added to increase website performance..
# Defaults
AddDefaultCharset UTF-8
DefaultLanguage en-US
ServerSignature Off
FileETag None
...
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Good VPS In London? [duplicate]
Possible Duplicate:
Who is your favorite VPS Provider?
I'm looking to rent a Windows VPS in (or near) London, England. I want to be able to do performance testing of our North American web ...
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On Windows it's possible to monitor the hard faults for each process?
I'm tuning a production server that runs Windows Server 2003 SP2. I want to monitor the hard faults (read an write separately) for each process. Is it possible?
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Webserver: Performance impact when storing session files on /dev/shm
I have a website runing on a typical setup: Linux, Apache, PHP, MySQL.
However, what's not typical about it, is that it's getting tons of traffic (400,000+ visits a day) and so, efficiency is becoming ...
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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 + ...
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How to use SMB Multichannel over VPN?
According to this article SMB Multichannel can provide the following capability:
Increased Throughput - The file server can simultaneously transmit additional data by using multiple connections for ...
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Samba and luks encrypted disk together: Huge performance loss despite plenty of CPU resources, LUKS and samba alone works as expected
Setup:
SSD encrypted with luks aes-xts 512 bits (256 bits AES key), ext4 filesystem
dd write performance of 138 MB/s, CPU usage 97-100 %
dd if=/dev/zero of=testfile status=progress bs=32M count=128
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Bottleneck identification using iostat, vmstat, mpstat
I am doing some Apache and MySQL performance tests, then upgrading a single component and running tests again to see where the bottlenecks are. I have a local used server warehouse (Tams in Lindon UT) ...
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Apache Tuning for 512GB RAM
Use Case:
API Server Cluster Optimized for JSON Data Submission
I have a distributed application sending info to API servers that are slaves of a MySQL 8 master. Applications do full initial sync (~...
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Online performance tuning apache tomcat
I'm relatively new to this field and not sure whether I'm posting the question in the correct forum.
I'm trying to do online parameter tuning for the TPC-W benchmark. (It is a 3-tier web application ...
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What does the following C-State output mean?
# cat /proc/acpi/processor/CPU0/power
active state: C0
max_cstate: C8
maximum allowed latency: 2000000000 usec
states:
C1: type[C1] promotion[--] demotion[-...
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How to resolve '[info] server seems busy' from apache server logs?
I've seen this question asked a few times but it hasn't had any real answer; so I've decided to post my resolution.
The below info message can be seen in the apache error.log:
[info] server seems ...
user101130
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Does Apache mod_status give any insight to tuning Apache config?
Does the Apache mod_status output give any insight to tuning Apache prefork config?
For example, using Apache's mod_status, I figured out that
My server gets 3 requests/sec average, the range is 2-...
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How to exclude requests from unwanted sources
Scenario:
Client buys our analytics services and includes our analytics SDK in his mobile app.
Users who download the app will start sending us lots of data.
When the client stops paying for our ...
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How do I increase UDP Recv-Q
I have a gigabit connection that is not fully utilized but I am getting packet receiving loss.
When I do netstat, it shows the Recv-Q sometimes maxes out at 262656 during heavy traffic.
Proto Recv-Q
...
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Copying cause big iowait
I have dedicated server with 3 HDD. System disk, backup disk (same as system disk) and data disk. When I copy lot of data with cp (say, between backup disk and data disk) load average goes sky high.
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How to know if my nginx is in good health?
I am running a nginx on EC2 (m1.small) for SSL termination.
I am using 2 workers on Ubuntu, with latest nginx (stable), the network throughput is around 2Mbps and system load average is around 2 to 3....
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JVM tuning in JBOSS AS 7
Can anyone explain as to where and how do I configure the following JVM parameters to tune JBOSS. I am using the latest JBOSS AS 7.
I am using openJDK-6 on Linux.
The following are the parameters ...
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RRAS (Routing and Remote Access) change process priority to "realtime"?
I have a windows server 2012 running RRAS and some other services.
Beacause of that I guess I have experience some slowdowns and dropout of package.
My question is how to find, and change the ...
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Doubled up RAM to 32 GB - now how to speed up a "LAPP" server?
I run a small Facebook game at a CentOS 6.3 quad core machine with PostgreSQL 8.4.3 + few PHP scripts (doing mostly select queries) + 1 Perl daemon and even though the server worked ok, I've suggested ...
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Apache2 on linux - how to track down performance trouble
I am stuck on this topic for a while now: How can I get more details on where response time burns.
My Problem is the extreme variance in response times. Sometimes it takes the server 5 or 10 seconds ...
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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 ...
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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 ...
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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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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 ...
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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, ...
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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 ...
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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 ...
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Config MySQL to maximum speed and memory
I have a server, 8 cores, 12 GB RAM. This server is only used to run MySQL. So, help me config /etc/my.cnf to maximum speed, memory for MySQL.
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How to see actual size of tcp send and receive buffers?
we are on a debian system and are trying to tune the tcp/ip stack to our needs. We all know that you can set the maximum tcp buffer size with some kernel parameters like this:
net.ipv4.tcp_wmem = ...
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How to make SSRS 2005 run fast in general?
Are there any general rules/tips which we can use to run Sql Server Reporting Services 2005 reports faster?
I have been tuning the Tsql behind the reports but does there exist any SSRS specific ...
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Specific apache + mysql settings for a light-weight site
I have a small website with a Joomla and a Moodle set up. It seems that both of these are very slow.
The server (CentOS release 5.5 (Final)) is a virtual dedicated server with about 2GB of ram.
I don'...
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Optimizing MySQL server
I need help in optimizing my my.cnf configuration file. I have two servers connected directly through LAN network (1 GBit/s). The first server is an Apache web server and the second one is a MySQL ...
Julie
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How to preserve sysprep from changing Default User settings
I'm having diffculties configuring 20 new Dell Vostro minis here. I set up one of them with my preferred OS, applications and settings, especially the Visual Effects Settings of Windows XP. I set them ...
user33794
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How do I objectively measure an application's load on a server
All,
I'm not even sure where to begin looking for resources to answer my question, and I realize that speculation about this kind of thing is highly subjective.
I need help determining what class of ...
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postgresql - cache preferences per table/db
i'm curious if there is any way to hint postgresql which data should be more likely cached in memory. in my scenario the server would be handling mostly read traffic, whole data-set is much larger ...
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Lower Maximum Possible Memory Usage
I've been using MySQLTuner to optimize my database, and the only problem I am having is:
[!!] Maximum possible memory usage:
14.8G (126% of installed RAM)
I'm not sure what I should be changing ...
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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 ...
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Why do most ulimit recommendations call for setting file descriptor limits to 65535?
In searching for max file descriptor ulimit tuning recommendations, many sites recommend setting a file descriptor size of 65535. In some cases, its 100000, 120000, and even higher. Some of these ...
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how to reach 1M concurrent TCP connections?
I am trying to setup a environment with multiple nodes (1 receiver + 16 senders) to establish 1,000,000 (1M) concurrent TCP connections.
Using this tool: https://github.com/Microsoft/ntttcp-for-linux
...
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MariaDB taking up 100-200% CPU
Server Specs
RAM CPU STORAGE
80 GB 20 Cores 1536 GB SSD
TRANSFER NETWORK IN NETWORK OUT
20 TB 40 Gbps 8000 Mbps
This is the results from show status:
...
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How can i speed up an XWiki installation on debian?
We installed XWiki on Debian. Page load times in default config were about 2 seconds. Tuning the memory parameters according to the XWiki performanve guide brought it down to 1 second. But for a local ...
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How do change the max IO request size on Windows Server 2008 R2
As I understand it Windows Server 2008 R2 has the ability to send IO requests to the storage subsystem of up to 1MB in size. Back in the Server 2003 era (and before) this used to be limited to 64KB.
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Strategy to optimize raid cache
HP SmartArray have "Accelerator Ratio: XX% Read / YY% Write", that configures how much cache ram dedicated for read, and how much for write.
Is there way to find best proportion on alive server in ...
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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. ...
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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 ...
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How to tune down the Hyperic built-in postgresql database for a small setup
We are testing out Hyperic 4.5.1 in a quite small environment for now. Currently there are just 1-5 agents and there probably won't be any more than 10-15.
When I run ps ax there are 20(!) postgres ...
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Apache Config for High Page View, Long Session Users - KeepAlive and MaxRequest variables
I am currently running a web app that sees several (~15) users logging in once each day, and then leaving the web app open where it automatically refreshes with new content every 5 minutes. Each user ...
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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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