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Meningkatkan Performa Database MySQL

Langkah berikut bisa digunakan untuk meningkatkan kecepatan akses terhadap database MySQL, terutama jika akses dilakukan dari komputer dengan sistem non Linux.1. Memperbaiki DNS setting dan memasukkan ip address / nama host client yang mengakses mysql kedalam file /etc/hosts di server mysql.Proses edit file /etc/hosts ini bisa dilakukan menggunakan webmin ataupun diedit langsung. Berdasarkan ujicoba langsung, tips ini meningkatkan kecepatan koneksi hingga 10X2. Memperbaiki / meningkatkan setting konfigurasi MySQL pada file my.cnf. Secara default, setting mysql menggunakan setting normal dengan memori kecil.# This is for a system with little memory (32M - 64M) where MySQL plays# an important part, or systems up to 128M where MySQL is used together with# other programs (such as a web server)Dengan...

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Tuning MySQL Performance

!--google_ad_client = "pub-2141753384638792";/* 728x15, dibuat 08/03/26 */google_ad_slot = "5958615136";google_ad_width = 500;google_ad_height = 15;//-->script type="text/javascript" src="http://pagead2.googlesyndication.com/pagead/show_ads.js">I just stumbled across this interesting mysql tuning script called MySQLTuner. Don’t see this (or any other similar script) as the magical tool that will optimize your mysel server… There is no such thing, because there are so many different applications and each will require its specific database tunings.Still, mysqltuner can be very useful tool in many cases, like for ex:it gives a quick overview on your running mysql configuration and some common sense recommendations. i really liked how it computes the total amount of memory needed for the current...

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Tutorial for Decode and Encode Base64 or Decode MD5this linkDecode and Encode Bas...

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SIRCAM/Recycled Virus to Clean ?

This is bad, when I check my PC in this morning, my Windows XP invected by SIRCAM/Recycled Virurs, I try to find how clean this dam problem. After I googling, I found some tutorial. And this is the results.First Tutorial1. Go to command prompt.2. Type CD\ in drive C to go the root directory3. Type DIR /AH and press ENTER key. This will display all hidden files in your drive C4. If you see a file AUTORUN.INF and a folder Recycled, then your system is infected.5. Try doing this to your USB drive and check if your USB stick contains the same folder and AUTORUN.INF, if it does then your system is really infected.To remove it download and install a trial version of Trendmicro and scan your system.To manually remove it follow the following steps (This is the step I take when i repair my computer...

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WORM_VB.EFU

Overview This detection is for a worm which spreads by copying itself to network shared drives. It also has the ability to terminate security applications.CharacteristicsWhen the worm is executed, it creates a copy of itself using the following filenames:C:\BootEx.exe C:\Log.exe C:\WINDOWS\ErrorReport.exe C:\WINDOWS\MonitorMission.run C:\WINDOWS\MonitorSetup.exe C:\WINDOWS\regedif.exe C:\WINDOWS\SystemMonitor.exe C:\WINDOWS\Win System.exe C:\WINDOWS\windows.exe C:\WINDOWS\WinSystem C:\WINDOWS\WinSystem.exe C:\WINDOWS\WinSystem32.exe C:\WINDOWS\SYSTEM\mscomfig.exe C:\WINDOWS\SYSTEM\msiexece.exe C:\WINDOWS\SYSTEM\rundlI.exe C:\WINDOWS\SYSTEM\WindowsUpadate.exe C:\WINDOWS\SYSTEM\msidlI.exe C:\WINDOWS\SYSTEM\msiexee.exe C:\WINDOWS\SYSTEM\regedif32.exe C:\WINDOWS\SYSTEM\SCCONFIG.exe C:\WINDOWS\SYSTEM\WindowsProtection.exe...

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BASICS DOS TUTORIAL

Before you begin this tutorial, please make sure that your prompt is C:\> If it is not, please do the following:Directions:1. Type: c:2. Type: cd..This should place you into the C:\> working directory.NOTE: DOS is not case sensitive; therefore, a command can be entered in with CAPITAL LETTERS, lower-case letters, or a MiXtuRe of the two.Hardware and Software DifferencesThere are two parts to a computer system, the hardware and the software. Hardware refers to the physical components of a computer. An example of hardware components would be the monitor, keyboard and mouse. Software represents the programs which contain a set of instructions written to perform a certain task on the computer.What is DOS?DOS stands for Disk Operating System. DOS controls the computer’s hardware and provides...

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XP REPAIR INSTALL

Repair Install Printable version Because of Service Packs, virus, malware, spyware, etc. changes and warnings will be added. Read entire article before proceeding with the Repair Install. It is extremely important that you backup important data that is not available from other media sources. This backup should be located on a separate hard drive, CD, DVD, network storage, etc. that will not be affected by the repair install. Please check out the warning links before attempting the Repair Install. It is to your advantage you follow the suggestions to prevent data loss and especially if you also have the capability to boot into XP, perform the steps listed in the Warning #1 , before proceeding with the repair install. If the capability...

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Top 84 MySQL Performance Tips

MySQL is a widely used and fast SQL database server. It is a client/server implementation that consists of a server daemon (mysqld) and many different client programs/libraries.You can check the same tips from here.Here is very useful tips for all mysql DBA's,Developers these tips are noted from MySQL Camp 2006 suggested by mysql community experts.Kaj (Most Excellent Obvious Facilitator) Index stuff. Ronald Don't Index Everything Use benchmarking Minimize traffic by fetching only what you need. Paging/chunked data retrieval to limit Don't use SELECT * Be wary of lots of small quick queries if a longer query can be more efficient Use EXPLAIN to profile the query execution plan Use Slow Query Log (always have it on!) Don't use DISTINCT when you have or could use GROUP BY Use proper data partitions...

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Calibrate the notebook PC battery

Short discharges and recharges do not fully synchronize the battery's fuel gauge with the battery's state-of-charge. This can result in the amount of power available in one cycle being less than expected or the battery meter being inaccurate.Under normal usage, batteries should be calibrated a minimum of once every 3 months. Your battery can be calibrated by following these steps:Step 1 - Disable the Windows Power Management In Windows, right-click the Desktop and select Properties in the menu list. Click the Screen Saver tab and then click the Power button. Under Power schemes, select Always On in the drop down menu. Under Settings for Always On power scheme, select Never in each of the drop down menus. Click OK on the Power Options Properties window and then click OK on the Display Properties...

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Solution to MySQL Replication Problems: Master DB crashed

It is commons that replication will hang after master database crashed. And the error message you will get when you show slave status is:Client requested master to start replication from impossible position (server_errno=1236)This happened because MySQL write to bin-log in batch basis. If every bit of your data is mission critical and any inconsistent between master and salve is not accectable, then you should redo you replication all over again.So far I do not found any way to prevent this replication failure. However, you may add the follwing line into you my.cnf to reduce the chances it happen:sync_binlog=1This means that MySQL will write to bin-log after each update instead of write in batch. As you may expect, this will reduce the performance of the database.Else, there is another way...

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Perl Basic Program PART II

String matchingOne of the most useful features of Perl (if not the most useful feature) is its powerful string manipulation facilities. At the heart of this is the regular expression (RE) which is shared by many other UNIX utilities. Regular expressionsA regular expression is contained in slashes, and matching occurs with the =~ operator. The following expression is true if the string the appears in variable $sentence. $sentence =~ /the/The RE is case sensitive, so if $sentence = "The quick brown fox";then the above match will be false. The operator !~ is used for spotting a non-match. In the above example $sentence !~ /the/is true because the string the does not appear in $sentence. The $_ special variableWe could use a conditional as if ($sentence =~ /under/){ print "We're talking about...

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Perl Basic Program PART I

Here is the basic perl program that we'll use to get started. #!/usr/local/bin/perl## Program to do the obvious#print 'Hello world.'; # Print a messageEach of the parts will be discussed in turn. The first lineEvery perl program starts off with this as its very first line: #!/usr/local/bin/perlalthough this may vary from system to system. This line tells the machine what to do with the file when it is executed (ie it tells it to run the file through Perl). Comments and statementsComments can be inserted into a program with the # symbol, and anything from the # to the end of the line is ignored (with the exception of the first line). The only way to stretch comments over several lines is to use a # on each line. Everything else is a Perl statement which must end with a semicolon, like the...

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