Optimization is the process of modifying a system to make some aspect of it work more efficiently or use fewer resources.

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2
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1answer
123 views

Would software RAID0'ing SSDs help or hinder maximization of useful CPU work throughput?

My question is in the title... here is some background: [OS is Linux.] [UPDATE: The contents of this RAID0 is redundant (sync'd from SCM). I am not worried about the increased risk of data loss.] ...
-1
votes
0answers
13 views

How to optimize Tomcat for small JSON payloads

I'm currently running an API which returns < 1kb JSON & XML messages from a GET Request. Secondarily it also accepts ~3MB data files via a Put request about once a week. I'm running Tomcat ...
0
votes
3answers
55 views

Evaluating the CPU I/O wait on Linux

Doing a top to check the io wait, I get these figures: Cpu(s): 6.7%us, 1.4%sy, 1.2%ni, 85.5%id, 5.0%wa, 0.0%hi, 0.3%si, 0.0%st Looking at these figures (%us ~= %wa), do they mean that: ...
0
votes
0answers
113 views

Apache Worker MPM / PHP-FPM Tuning

I have a VPS running CentOS 6.5, Apache 2.2, PHP-FPM v5.4 and MySQL 5.5. I take advantage of APC and Memcache. The VPS has 8 cores and 8GB RAM. I'm running a medium volume site (15,000 users / day, ...
2
votes
2answers
189 views

Possibility of WAN Optimization for SSH traffic

While I do understand that SSH by itself is a very low bandwidth utilizing protocol, it is sometimes choking up bandwidth during peak hours in our office environment. I want to know if at all it is ...
1
vote
0answers
63 views

How to use an origin-pull CDN with external CNAMEs?

I have a particular issue that I'm struggling with regarding setting up a CDN. To describe our situation: We are running an ASP.NET based CMS(DotNetNuke), configured with two different web heads on ...
0
votes
0answers
144 views

Tuning Apache KeepAlive Timeout for HTTPS

My website forces HTTPS everywhere and has an average first load time of 3-5 seconds. Thanks to caching, repeat load time is 0.8 seconds. The SSL negotiation takes 150-300ms on my server, so I want ...
0
votes
1answer
85 views

Why this server is so slow?

I hired a VPS in DigitalOcean, it's hosted in Amsterdam, I'm in Turkey. But server is responding slowly and page is freezing/lagging even at ajax POST-GET request.(there is a basic browser game in ...
1
vote
2answers
105 views

My Vps is too Fragile

I am using digitalocean $5 plan. 1 cpu , 512mb ram , mysql + apache , nginx + centos 6.5 + cpanel installed. 2 wordpress site on that. But if I reload page of one of my sites, cpu usage increasing ...
0
votes
0answers
24 views

Will pfctl -sr show ordered rules when using -o profile?

When I enable the -o profile option with pf will pfctl -sr show me the new order of the rules?
0
votes
0answers
85 views

PHP-FPM showing 34 worker process despite adjusting configuration

I recently asked this question and I got an answer about how I should limit php-fpm from running 34 worker process, considering that I get on average 20 visits for one light website. So, I ...
1
vote
3answers
238 views

What is the Ideal value for Worker Processes in Nginx Config?

I have 31GB RAM 8 Core Web Server with current load of 3k per min. Currently worker_processes parameter in nginx config is 4 which as per my understanding means only 4 cores would be used. But when I ...
2
votes
1answer
212 views

Slow disks but lots of RAM - optimization tips?

I have a Windows Server 2012 with rather slow hard-drives BUT with a lot of RAM and I can't change that (it's an Amazon EC2 actually). What can I do to optimize performance? I have 16 GB of physical ...
7
votes
3answers
3k views

Maximizing rsync performance and throughput - directly-connected gigabit servers

I have two Dell R515 servers running CentOS 6.5, with one of the broadcom NICs in each directly attached to the other. I use the direct link to push backups from the main server in the pair to the ...
0
votes
1answer
112 views

How to speed up Outlook 2007 / Exchange 2003 mail searches?

Our current setup is the Outlook 2007 client connected to an Exchange 2003 server. We run the client on 2K3 terminal servers and have disabled PST files. There is quite a large volume of emails stored ...
0
votes
0answers
175 views

samba over NFS large file

For several months we encounter problems delays : we have a server ( os: ubuntu server 12.04 ) with samba and ldap service . Our clients are on Mac, Windows and Linux client ubuntu . Huwaei NAS ...
0
votes
2answers
206 views

Optimize images on CentOS server [closed]

I have a huge directory of images on a CentOS server (~65gb). The images are predominantly jpeg's but theres some png's and a couple of gif's. Here's the annoying and weird part - the images are all ...
0
votes
2answers
81 views

MySql table optimization causing more problems than it solves

I have a heavily accessed table corresponding to user's private messages, with over 10 M rows. When I run the user deletion process, obsolete messages are deleted from the table, typically more than ...
-3
votes
1answer
45 views

Choosing between which HTTP, DB, Optimization tools on a VPS server [closed]

I am finally moving from a Shared hosting to a VPS hosting on Digital Ocean. Since now I have control of what I can install, I would like to know which of these are preferred to install. Web Server ...
1
vote
1answer
362 views

Directadmin Apache server finetuning advice

I currently have a dedicated server from which I provide shared hosting for some clients of mine. Server specs AMD Athlon(tm) 64 X2 Dual Core Processor 4000+ 4GB DDR RAM 1x Seagate ...
1
vote
2answers
340 views

mysql configurations for best performance

I have a huge magazine on dedicated server(1 website only on the server), all time the server have big load, "top" tool show me that the user "mysql" make this load: PID USER PR NI VIRT ...
0
votes
2answers
145 views

Centos 6 webserver - best use of spare memory [closed]

Just after any quick easy suggestions about where I should try tweaking my web server to use some of the spare memory and reduce CPU usage. Sorry if I'm a bit vague, but this isn't really my area. I ...
2
votes
1answer
2k views

Nginx “ssl_stapling” ignored, no OCSP responder URL in the certificate

I'm trying to setup OCSP stapling on Nginx because I ran a test and it suggested the idea and well, you know. https://sslcheck.globalsign.com/en_GB/sslcheck?host=aj2jewellers.co.uk#176.58.103.165 ...
3
votes
2answers
2k views

PHP + Apache long wait time

I've run into a bit of a brick wall with troubleshooting my dedicated websever. Recently, my website spiked with the amount of request/per second and it crashed. The box original had 8GB of RAM, 8 ...
2
votes
4answers
521 views

Network Latency over WAN

Let me take a minute to explain the background of the challenge I am facing. My company has offices in US and Asia. The users work on large CAD files. The office in US has NAS (Network Attached ...
2
votes
1answer
65 views

Linux Kernel setup: is it good idea to enable everything in Cryptographic API?

There are several implementations for some algorithms, which use CPU instructions which may or may not be available on current system. Is it good idea to just enable (in kernel, not as modules) all of ...
0
votes
1answer
115 views

Centos help optimize Apache and kernel

I am looking for tips/articles on how to optimize CentOS for production use I will have 2 servers 1 web server where haproxy will also running Haproxy will be in front of apache and will be proxying ...
1
vote
1answer
129 views

Drop caches in Linux

I have an embedded Geode-based application server with 512MB RAM and I'm about to try to maximize free memory during applications workload, which uses MySQL database 5.5 with InnoDB quite ...
0
votes
1answer
123 views

Apache performance is really heavy [duplicate]

My company runs a heavy traffic site, about 150k daily. Each time after apache restarted, site load is very fast. The problem always comes after a couple of hours. Server config : Intel Core ...
1
vote
0answers
372 views

High latency on domain with CDN

High latency on domain with CDN I have problems with latency on my server, these are the tests I made with blitz.io Latency album http://imgur.com/a/bCmwo I would uploaded images here but it ...
1
vote
1answer
140 views

MySQL occasional non-responsive only on one database

I have an issue that occasionally (once or twice a week, not necessarily during peak hours) that queries on a certain db (the db of the largest of my sites) suddenly stop responding for about an hour. ...
-3
votes
1answer
134 views

Can postgres go faster? [closed]

My question is simply: have i missed any configuration settings that might make postgres achieve better read throughput? Background I'm modeling a very simple twitter program. My schema has only 3 ...
-1
votes
1answer
103 views

What will be the best mysql settings for 3gb server? [duplicate]

I have a 3GB server with the below settings. The issue I am facing is when I pull some records through the admin panel of my site, sometimes it works well, but most of the times it process very slow. ...
-4
votes
4answers
531 views

What is the *optimal* virtual memory configuration for this server? [closed]

I am maintaining a Small Business Server 2003 (x86) server, that was originally installed and configured by someone else in early 2009. Recently, although we have never had any obvious memory-related ...
3
votes
2answers
201 views

What's the optimal server configuration for fastest inserting in a MySql database in this scenario? [closed]

I have a MyISAM table partitioned by range with 90 partitions representing the last 90 days. I expect this table to receive somewhere between 500 million to 1 billion records before i start rotating ...
-1
votes
1answer
170 views

Server optimization for long running script [duplicate]

I have a system running on a remote VPS whose main feature is a long running script (it could run for about 10 hours, depending on the user input). The following are some of its features: Database ...
1
vote
1answer
797 views

MySQL MyISAM multi-core optimization

I've noticed that our app does not respond to requests when a demanding request is in execution. Running top seems to identify the source of the problem: top - 13:54:25 up 1 day, 13:43, 2 users, ...
1
vote
2answers
64 views

Can my mysql server be fully tweaked? [closed]

I'm on a quadcore CENTOS 5.9 i686 standard running WHM 11.36.0. It's a dedicated LAMP server with lots of websites, most of which are using databases. I'm monitoring the server using Munin and notice ...
2
votes
1answer
1k views

Tuning MySQL of 1.3 G DB, 8GB Ram, High IO Wait

I am having MySQL database of size 1.3 GB on 8 core virtual machine, 8 GB of memory and I am having troubles optimizing the configuration. There is a lot of small rows and lot of joins going on. I've ...
0
votes
2answers
721 views

virtual memory optimization on exchange server 2010

Hi I did some Google searching but came up blank I know mycomputer/computer > Properties > advance System settings > Advance[tab] > Settings[Performance] > Advance [Tab] > Change > customsige ...
0
votes
1answer
372 views

mysql database config optimization

Have a heavily trafficed database running mostly innodb and would like to better optimize the mysql config. Server has 32Gb ram and the biggest tables are ~18Gb innodb. I think I have done all the ...
0
votes
2answers
277 views

Would moving images to a CDN significantly reduce my CPU/memory load?

I am trying to reduce the cpu/memory load on my web server, and I am wondering if I should host my images on a CDN instead of my webserver. Does serving these images take up much CPU/memory?
-1
votes
1answer
136 views

Recommended resources for server tuning and security checklist for production Linux server deployment [closed]

There are many questions on server tuning and security checklist are being closed. So, I am not asking for the exact detail. Please point me to the resources you find it is helpful (no matter web ...
5
votes
2answers
575 views

How can I handle big traffic spikes on my dedicated server?

I have an E-Commerce site, which gains a sudden peak of very high traffic when I turn on different ads campaigns. From this moment on, my current dedicated server (Hostgator, 4GB Memoray, 100mbps ...
1
vote
1answer
857 views

Centos MySQL optimization 4gb ram

I am using Centos 6 64bit on vps with 4gb ram. 1 wordpress website and 2 wallpapers script websites. Wordrpess have 10k visits daily. Site is slow. My.cnf # Example mysql config file for large ...
5
votes
3answers
1k views

Optimizing VPS Server Memory

WHAT I'M TRYING TO DO The server resource limits sometimes run tight; to help prevent memory exhaustion, I've had to limit server processes. I'm needing a little expert help to know if I'm on the ...
0
votes
1answer
147 views

Nginx as a reverse proxy + Apache or completely cut out Apache? (WordPress Multisite)

I am starting a WordPress multisite network with domain mapping and I am trying to think through my server set up. Right now, I only have one medium sized VPS but hopefully I will need to add more ...
-1
votes
1answer
889 views

How to speed up a MySQL Import [closed]

I posted a related question on askubuntu.com, but this may be a better place and way to ask it. I'm working on a way to speed up a db import. Currently the import is taking a week, give or take a few ...
0
votes
2answers
1k views

Optimize Windows file access over network

At my company I frequently need to access shared files over a Windows network. These files are located on the other side of the planet, so I guess the file share goes through some kind of VPN over ...
0
votes
1answer
99 views

Windows 2008 R2 VPS resource footprint reduction

Given a Windows 2008 R2 Standard VM with: 4x vCPU Intel Xeon E5620 1GB RAM 15GB HDD What can I do to reduce the amount of CPU/RAM/HDD utilised by the OS? The VM will be used exclusively as a web ...