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Mysql Efficiency How can i improve my mysql query efficiency? What are the guidelines? are there any tips i should know or follow?

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Go over your cdoe make sure you don't use unnecessery commands, joins and loops.

Making your code more efficiant is a thing you'll get better with the more experianced you get.

Cheers.

Posted on Aug 10, 2008

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Honda fit 2009


Fuel efficiency is a form of thermal efficiency, meaning the efficiency of a process that converts chemical potential energy contained in a carrier fuel into kinetic energy or work. Overall fuel efficiency may vary per device, which in turn may vary per application fuel efficiency, especially fossil fuel power plants or industries dealing with combustion, such as ammonia production during the Haber process.
In the context of transport, fuel economy is the energy efficiency of a particular vehicle, and is given as a ratio of distance travelled per unit of fuel consumed. Fuel economy is expressed in miles per gallon (mpg) in the USA and usually also in the UK-there is sometimes confusion as the imperial gallon is 20% larger than the US gallon so that mpg values are not directly comparable. In countries using the metric system fuel economy is stated in kilometres per litre (km/L) in the Netherlands, Denmark and in several Latin American or Asian countries such as India, Japan, South Korea, or as the reciprocal ratio, "fuel consumption" in liters per 100kilometers (L/100 km) in much of Europe, Canada, New Zealand and Australia. Litres per mil are used in Norway and Sweden.
Fuel consumption is a more accurate measure of a vehicle's performance because it is a linear relationship while fuel economy leads to distortions in efficiency improvements.
Weight-specific efficiency (efficiency per unit weight) may be stated for freight, and passenger-specific efficiency (vehicle efficiency per passenger).

May 30, 2013 | Exercise & Fitness

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Why are my equipment rating numbers important.


Rating numbers indicate the efficiency of heating and air conditioning equipment and are directly related to the amount of energy a specific model uses. The higher the rating, the more efficient the product, and the lower your heating and cooling bills can be. The federal government establishes rating guidelines and sets minimum efficiency levels. For cooling, the rating is SEER (Seasonal Energy Efficiency Ratio). For heat pumps, the rating is HSPF (Heating Seasonal Performance Factor). Gas furnaces are rated with AFUE (Annual Fuel Utilization Efficiency).

on Mar 27, 2011 | Heating & Cooling

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Improve Your Car?s Fuel Efficiency


Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} Improve Your Car’s Fuel Efficiency
Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} It’s really exasperating to see fuel prices skyrocketing, right? We can only feel helpless in the face of recurring and economy-driven price fluctuations. Seeking measures to improve fuel economy is the only way to combat rising fuel prices. Do not disregard these simple guidelines; each little step can really start adding up to significant savings to your budget.

Check Tyre Pressure

Keeping the tyres well inflated is one of the simplest things you can do to help improve your car’s fuel efficiency. You can improve the mileage by about 3.3 percent if you keep your tyres inflated properly, according to the DOE.

Lighten Your Load

Empty out your boot of unnecessary items. For every extra 45 kg you carry, your fuel efficiency can drop by 1-2% in a typical vehicle.

S-L-O-W D-O-W-N

The faster you drive, the more fuel you use. Driving within the speed limit recommended by the manufacturer helps save fuel. Driving just 5mph over the speed limit can affect fuel economy by up to 23%. Likewise, quick acceleration consumes too much fuel; accelerate slowly and gradually.

Do Fuel Quality/Types/Additives Help Mileage?

Petrol pump attendants often try to convince you to go for ‘Speed petrol’ or ‘X-tra Mile diesel’. But this need not necessarily help improve your vehicle’s fuel efficiency. Always use the grade recommended for the vehicle by the manufacturer. Higher octane fuel may not only be a waste of money but may harm the vehicle, as well. However sticking to one brand of fuel is always good for the engine. Know more about Octane Ratings

Tune Your Engine

A well-tuned engine can improve fuel economy by up to 4%. So change your oil and follow your car manufacturer’s recommendation on servicing.

Clean the Air Filters Regularly

Air filters keep impurities from damaging your engine. Replacing a clogged air filter can improve fuel economy by as much as 10%.

Keep the Windows Closed

Driving with your windows open considerably reduces mileage, far more than keeping the AC on while driving along highways. So preferably keep the windows closed and the AC on if you want to keep cool. Of course the air-conditioning decreases fuel efficiency considerably, so use it judiciously. Windows down or A/C on — which is more fuel-efficient?

Clean Spark Plugs

Ensure your spark plugs are in good condition. Renew the plugs and wires at intervals specified by the manufacturer. This will keep all cylinders firing properly resulting in higher efficiency.

Don’t Be a Clutch-Driver

Never keep your foot on the clutch while driving. When you do this, pressure is being placed on your clutch, and it not only reduces mileage, but also wears out the clutch plate, replacing which is not cheap.

Keep the Car in Showroom Condition

It’s always prudent to keep the car in the showroom condition. Remember that any modification to the car, such as broad tyres, diffusers etc., will adversely affect the mileage.

on Sep 11, 2010 | Honda Accord Cars & Trucks

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What is the power consumption for - printing, standby and power save for this machine in watts.


Not enought to worry about because

As an ENERGY STAR® Partner, Xerox has determined that this product meets ENERGY STAR® guidelines for energy efficiency.

The information you require is not listed in the manuals which are available online.

Jan 07, 2011 | Xerox Phaser 7300DN Laser Printer

1 Answer

What are the futures of a computer which is described as Pentium 4


Hi,

Pentium 4 refers to the laptop processor.

Intel Pentium 4 is a family of high-performance microprocessors that succeeded Pentium III family. Pentium 4 CPUs are based on new NetBurst micro-architecture, which differed significantly from P6 micro-architecture used in Pentium II/Pentium III microprocessors. As an overall CPU performance is proportional to its frequency and its efficiency, to achieve better performance levels many micro-architectures, including P6, strike a delicate balance between faster CPU frequencies and improved efficiency. The NetBurst microarchitecture used different approach - it attempted to improve performance primarily by increasing CPU frequency, often at at the expense of efficiency. One of key elements in this approach was "Hyper-Pipelined Technology" - 20-stage pipeline (not counting decoder stages), that was significantly longer than in previous generation of Pentium processors.

The rest of the components in the laptop are used in many other laptops. For example hard drive, memory and graphics.

Regards.

Jul 07, 2010 | Intel XTERNote MS2117 Notebook

Tip

Power Efficiency Report In Windows 7


If you have a laptop, you can use the efficiency calculator to get Windows 7 to generate loads of useful information about its power consumption. Used in the right way, this can help you make huge gains in terms of battery life and performance. To do this you must open a command prompt as an administrator by typing 'cmd' in Start Search, and when the cmd icon appears, right-click it and choose Run as administrator.
Then at the command line, just type in 'powercfg -energy' (without quotes) and hit Return, and Windows 7 will scan your system looking for ways to improve power efficiency. It will then publish the results in an HTML file, usually in the System32 folder. Just follow the path it gives you to find your report.


on Jun 10, 2010 | Computers & Internet

Tip

Get a power efficiency report in windows 7


Get a power efficiency report Have a laptop and want to get more battery life out of it? Windows 7 includes a hidden built-in tool that will examine your laptop's energy use and make recommendations on how to improve it. To use it:

1. Run a command prompt as an administrator. To do this, type cmd in the search box, and when the cmd icon appears, right-click it and choose "Run as administrator."

2. At the command line, type in the following:
powercfg -energy -output \Folder\Energy_Report.html
where \Folder represents the folder where you want the report to be placed.

3. For about a minute, Windows 7 will examine the behavior of your laptop. It will then analyze it and create a report in HTML format in the folder you specified. Double-click the file, and you'll get a report -- follow its recommendations for ways to improve power performance.

on Jan 12, 2010 | Computers & Internet

1 Answer

MySQL Error


This error means that mysql doesn't have sufficient memory to store the entire query result, so far no rocket science, the first thing you have to do is check your query it might be wrong, is it reasonable that it would return so many rows?

Aug 26, 2008 | Sun MySQL

Tip

Windows 7 Tip#3


Get a power efficiency report

Have a laptop and want to get more battery life out of it? Windows 7 includes a hidden built-in tool that will examine your laptop's energy use and make recommendations on how to improve it. To use it:

1. Run a command prompt as an administrator. To do this, type cmd in the search box, and when the cmd icon appears, right-click it and choose Run as administrator.

2. At the command line, type in the following:

powercfg -energy -output \Folder\Energy_Report.html

where \Folder represents the folder where you want the report to be placed.

3. For about a minute, Windows 7 will examine the behaviour of your laptop. It will then analyse it and create a report in HTML format in the folder you specified. Double-click the file, and you'll get a report -- follow its recommendations for ways to improve power performance.

on Jan 04, 2010 | Computers & Internet

Tip

Air Conditioner SEER Seasonal Energy Efficiency Ratio


Energy consumption for home air conditioning accounts for almost 5% of all the electricity produced in the USA. Energy Policy Act mandates minimum energy efficiency standards for commercial buildings, using research and standards developed by the American Society of Heating, Refrigerating, and Air Conditioning Engineers. Energy Star qualified central air conditioners have a higher seasonal efficiency rating (SEER) than standard models, which makes them about 14% more efficient than standard models. Energy efficiency specialists with certified training on retrofits and energy savings on both residential and light commercial units may enable you to save up to 50 percent on your air conditioning bills with the use of a high efficiency energy system. Substantial energy savings can be obtained from more efficient systems.

SEER (Seasonal Energy Efficiency Ratio) is related to the Energy Efficiency Ratio (EER), which is the ratio of output cooling in Btu/Hr and the input power in watts W at a given operating point and also to the coefficient of performance (COP) commonly used in thermodynamics. SEER rating more accurately reflects overall system efficiency on a seasonal basis and EER reflects the system’s energy efficiency at peak day operations.

The SEER rating is the Btu of cooling output during a typical cooling-season divided by the total electric energy input in watt-hours during the same period. SEER is related to the Energy Efficiency Ratio (EER), which is the ratio of output cooling in Btu/Hr and the input power in watts W at a given operating point and also to the coefficient of performance (COP) commonly used in thermodynamics. SEER rating more accurately reflects overall system efficiency on a seasonal basis and EER reflects the system’s energy efficiency at peak day operations. The higher the SEER number, the greater the efficiency of your unit. Therefore you will realize greater energy savings. The higher efficiency your product, the lower your long-term energy costs will be. Both central AC and air source heat pumps are rated according to seasonal energy efficiency ratio (SEER).

Before you consider upgrading your cooling equipment, the cheapest way to save money and energy from cooling is to reduce the need for mechanical air conditioning in the first place. Ask your contractor about a variable speed air handler, which will improve comfort and efficiency and allow continuous air filtering at minimum energy cost. Also, because ducts are often responsible for a lot of wasted energy, make sure you hire a contractor who knows about high-efficiency installations. If your central air conditioning unit is more than 12 years old, replacing it with an Energy Star qualified model could cut your cooling costs by 30 percent.


on Dec 14, 2009 | Heating & Cooling

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