Questions tagged [optimization]

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

A system may be optimized so that it executes more rapidly, or is capable of operating with less memory storage or other resources, or draw less power. The optimized system will typically only be optimal in one application or for one audience. For example, one might reduce the amount of time a task takes to perform at the price of making it consume more memory.

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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.] [UPDATE 2: Practically, I'm likely splitting hairs…
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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 possible to reduce/optimize SSH (rsync) traffic…
deppfx
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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 AWS EC2 instances that sit behind an AWS ELB. We…
Justin
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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 see CPU performance I see that all 8 cores have…
Ut xD
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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 memory but 5-6 GB of it always stay free. Should I…
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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 Storage) where all the files are stored. The US users…
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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 them - i.e. is fastest implementation available…
Powerman
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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 https://i.stack.imgur.com/nKV1r.jpg I would uploaded images here but it requires 10+ rep, and can't post multiple links…
Cokaric
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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, load average: 1.02, 0.98, 0.83 Tasks: 110 total, …
rinogo
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What optimizations can be performed on SQL Server with SAN?

This question is a bit general since I am not exposed to SAN (Storage Area Network). Are there any optimizations or configuration changes that can be performed with SAN to improve SQL Server performance?
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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 found about this tool:…
Vojtěch
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MySql turning - "Select full join" is too high - How to identify the queries causing this

We're trying to manage and tune our MySql. One alert we're getting in phpMyAdmin is this: Select full joinDocumentation 421 The number of joins that do not use indexes. If this value is not 0, you should carefully check the indexes of your…
Kevin
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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 systems. # # This is for large system with memory =…
user156220
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Monitoring outgoing bandwidth of application

I currently have a VPS that is consuming a ton of outgoing bandwidth and I am trying to drill down to where this may be coming from. Does anyone know of a logical way to go about finding out which pages on the site are consuming the most outgoing…
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Balancing bandwidth allocation for nfsd

I am using NFS shares to transfer image files using clonezilla onto multiple lab machines, I am currently only imaging one or two machines at a time as a testing protocol but whenever I run more than one instance of imaging at the same time the…
rolands
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