how to defragment

Tags: manipulating enterprise foreach Insert name objects fetch fragmented bleIn a database with a large number of transactions, tables and indexes are fragmented over time. Therefore, to improve performance, you should periodically check the fragmentation of tables and indexes, and defragment them with a lot of fragmentation. 1. Determine all the tables in the current database that need to be analyzed for fragmentation. 2. Determine the fragmentation

9 Steps to resolve the slow shutdown of the Win7 system the specific solution is as follows: 1. Start-Control Panel-Power Options-enable advanced power management. 2, look at the computer Device Manager to see if there is a driver problem with the hardware equipment, if so, reinstall the relevant driver. 3, disk defragmentation. My Computer--right-click the drive to defragment the disk-Properties-Tools-Select the defragmented disk open the Disk Def

Efficient, fast use of computers, I am afraid is the pursuit of every friend's efforts, of course, the author is no exception! This is not, in their own Windows XP system, after several groping, "mining" out of the following "automation" of the application, do not dare to enjoy, dedicated to everyone. 　　 Automation of defragmentation Defragmenting is always a "potluck" operation of the computer, if you defragment every time, you must first exit

be noted that any use of clusters larger than 4KB under any circumstances would have the following negative effects: • The Disk Defragmenter tool cannot defragment this volume • Unable to use NTFS file compression features • Wasted disk space increase There are several ways to determine the average size of a file, one way from the Start button, select Run, type cmd in the Open box, click OK, and then execute chkdsk on the command line, using the

In a database with a large number of transactions, tables and indexes are fragmented over time. Therefore, to improve performance, you should periodically check the fragmentation of tables and indexes, and defragment them with a lot of fragmentation.1. Determine all the tables in the current database that need to be analyzed for fragmentation.2. Determine the fragmentation of all tables and indexes.3. Consider the factors to determine the tables and i

that you do not want to index. (Impact of Indexing Service on system performance) if you are accustomed to searching for files with everything, you can turn off indexing. Control Panel – Administrative Tools – services – Windows Search disabled. Close the disk defragmentation schedule. Using good disk defragmentation can improve disk performance, and if you are accustomed to manual grooming, you can turn off your grooming schedule and avoid having to automatically organize your work when you

configuring this in the test, the configuration of the-xx:newratio=4 is invalid for unknown reasons. Therefore, at this time the younger generation size is best set with-XMN.-XX:+USEPARNEWGC: Set Young on behalf of the parallel collection. Can be used concurrently with CMS collection. JDK5.0 above, the JVM will set itself according to the system configuration, so it is no longer necessary to set this value. JAVA-XMX3550M-XMS3550M-XMN2G-XSS128K-XX:+USECONCMARKSWEEPGC -xx:cmsfullgcsbefore

When our computer has been used for a long time, we will find that the computer becomes very card, and the speed of the operation is more and more slow, the computer system has always prompted the virtual memory shortage problem. So what can be done to solve this problem? Today the red and Black Alliance will come and talk to you. Win10 Professional version to clean up the disk fragments to solve the problem of computer card!Cause analysis: In fact, this is because we use a lot of software and f

performance set off fade-out fade-out effect. Run the folder, small software quickly.16, open Hybridboot (with personal preferences to open, Open will occupy the portion of the C disk capacity)Win10 start fast: Control Panel Power Options Select the power button's function, change the currently unavailable settings "shutdown settings" tick enable quick start. Please turn on hibernation first: win+r input powercfg–h on, turn off hibernation: Powercfg–h off (after closing the C drive will empty a

=NULL; returnsum;}//2. There is a return value int type, enter an array, no lengthjniexport jint jnicall Java_com_swust_array_mainactivity_sumarraya (jnienv*env, Jobject obj, Jintarray arr) { inti,j, sum = 0; Jint*buf; J= (*env)getarraylength (Env,arr); //In addition, the value returned here is jint*, not a const jint*, which means that the values therein can be modifiedBUF = (*env)->getintarrayelements (env, arr, NULL);//This sentence also tells the Java memory collector, do not reclaim the

set this value. JAVA-XMX3550M-XMS3550M-XMN2G-XSS128K-XX:+USECONCMARKSWEEPGC -xx:cmsfullgcsbeforecompaction=5-xx:+ Usecmscompactatfullcollection-xx:cmsfullgcsbeforecompaction: Because the concurrent collector does not compress and defragment the memory space, it can produce "fragmentation" after a period of time, which makes the operation less efficient. This value sets how many times a GC is run to compress and

collection. It is suitable for application server, telecom field and so on. Typical configuration : java-xmx3550m- Xms3550m-xmn2g-xss128k-xx:parallelgcthreads=20 -XX:+USECONCMARKSWEEPGC-XX:+USEPARNEWGC -XX:+ USECONCMARKSWEEPGC : Set old age on behalf of concurrent collection. After configuring this in the test, the configuration of the-xx:newratio=4 is invalid for unknown reasons. Therefore, at this time the younger generation size is best set with-XMN. -XX:+USEPARN

is no longer necessary to set this value. JAVA-XMX3550M-XMS3550M-XMN2G-XSS128K-XX:+USECONCMARKSWEEPGC -xx:cmsfullgcsbeforecompaction=5-xx:+ Usecmscompactatfullcollection-xx:cmsfullgcsbeforecompaction: Because the concurrent collector does not compress and defragment the memory space, it can produce "fragmentation" after a period of time, which makes the operation less efficient. This value sets how many times a GC is run to compress and

collection. JDK5.0 above, the JVM will set itself according to the system configuration, so it is no longer necessary to set this value. JAVA-XMX3550M-XMS3550M-XMN2G-XSS128K-XX:+USECONCMARKSWEEPGC -xx:cmsfullgcsbeforecompaction=5 -xx:+usecmscompactatfullcollection -xx:cmsfullgcsbeforecompaction: Because the concurrent collector does not compress and defragment the memory space, it can produce "fragmentation" after a period of time

-xx:cmsfullgcsbeforecompaction=5-xx:+ Usecmscompactatfullcollection-xx:cmsfullgcsbeforecompaction: Because the concurrent collector does not compress and defragment the memory space, it can produce "fragmentation" after a period of time, which makes the operation less efficient. This value sets how many times a GC is run to compress and defragment the memory space.-xx:+usecmscompactatfullcollection: Turn o

The following is the second part of the comprehensive anatomy of memcached. Release Date: 2008/7/9Original link: http://gihyo.jp/dev/feature/01/memcached/0002 Links to this series of articles are here: 1th Time: http://www.phpchina.com/html/29/n-35329.html 2nd time: http://www.phpchina.com/html/30/n-35330.html 3rd time: http://www.phpchina.com/html/31/n-35331.html 4th Time: http://www.phpchina.com/html/32/n-35332.html 5th time: http://www.phpchina.com/html/32/n-35333.html

is no longer necessary to set this value. JAVA-XMX3550M-XMS3550M-XMN2G-XSS128K-XX:+USECONCMARKSWEEPGC -xx:cmsfullgcsbeforecompaction=5-xx:+ Usecmscompactatfullcollection-xx:cmsfullgcsbeforecompaction: Because the concurrent collector does not compress and defragment the memory space, it can produce "fragmentation" after a period of time, which makes the operation less efficient. This value sets how many times a GC is run to compress and

associated with the application thread to clear older generations of memory. -XX:+USEPARNEWGC: Set Young on behalf of concurrent collection. Can be used concurrently with CMS collection. JDK5.0 above, the JVM will set itself according to the system configuration, so it is no longer necessary to set this parameter. -xx:cmsfullgcsbeforecompaction=0: Because the concurrent collector does not compress and defragment the memory space, running a pe

don't have to choose, only memory is where you want to go. If you want to be a little better, you add a MMU (memory Management Unit RAM Management Unit) that gives you a fully virtualized address space and allows you to make good tricks, such as frequent access to textures in memory (which is fast), and other parts in system memory, And most of them are completely unmapped-just like they are, usually, reading a disk for 50 years, This is no exaggeration, access to memory is like a day, this is

First, optimize the computer with the optimization master, open Optimization master-System optimization-boot speed optimization-start dwell time, select "Direct Access".Second, dust, clean up the disk and defragment the disk.1, open the chassis dust, all the connections are plugged in firmly.2. In My Computer window, right-click the drive letter you want to clean-"properties"-"clean disk"-tick the file you want to delete-ok-yes.3. Clean up the registr