how to defragment

Win7 system computer More and more slow how to do? The computer is slow generally is the computer to have too much rubbish to cause, the rubbish has the system rubbish separately, the commonly used software rubbish, uses the trace, the chat software rubbish, the browser rubbish and so on, how eliminates these rubbish to make the Win7 system computer not to be The following small series provides several methods for everyone's reference, I hope you can use it. Method 1: Timed cleaning

method One: 1, timed cleaning disk: Click on the C (System) disk--Properties---Disk Cleanup. As shown in the figure callout: 2, start the disk scan, after the scan to select the type of file you want to clean up, click OK Start cleaning. Method Two: Clean browser cache files: Open the browser---tools---Internet options---as shown in figure: Method Three: Defragment the disk: Right-click the computer-

you are controlled by others, you find the mouse delay when you open the Task Manager to see the CPU consumption, if very large, is the system has problems or is controlled, If the CPU usage is normal may be your mouse hardware problem! Knowledge expansion reading: Why is there no reason to break the screen and a mouse pause One, clean up the disk and defragment the disk 1. In My Computer window, right-click the drive letter you want to clean-"pr

Tags: how the step Member app cannot cluster remove set coercionWhen we delete a document or collection from MongoDB, MongoDB does not release the disk space that is already occupied, and it maintains a data file that has occupied disk space, although there may be a large and small list of empty records in the data file. When the client program inserts the document again, MongoDB allocates the storage space from the empty list of records to the new document. So for more efficient use of disk spa

)Delete all partitions of the table: #不会丢失数据, the table becomes the normal tableALTER TABLE TT REMOVE PartitioningTo rebuild a partition:This has the same effect as deleting all the records that were saved in the partition and then re-inserting them. It can be used to defragment partition fragments.ALTER TABLE tt REBUILD PARTITION p0, p1;Optimize partitions:If a large number of rows are removed from the partition, or a row with variable length (that i

Today the space quotient told me that the database space is full, checked, found that the site user behavior Record data table accounted for more than 20 MB. Accumulated for half a year, the deletion to free up space. Decisive Delete after the discovery of database space is not small, although the number of data records is zero.This is due to a fragment left in the data file after the delete operation. Delete simply deletes the data identity bits and does not

;background-image:none; "alt=" image "src=" http://img1.51cto.com/attachment/201410/10/1056852_ 1412911800ruow.png "border=" 0 "/>Fourth Step loading the databaseAfter the database file defragmentation is complete, use the command mount-database–identity test01 or load the database using the Exchange EMC graphical interface. A full data backup of the database is recommended immediately after the database is loaded properly.Attention1, use the command eseutil/d to

with the user thread when doing the GC (concurrent execution), and if the tagging algorithm is used, then the memory space of the available objects is moved when the cleanup is done, then the application's thread is likely to find no where the Application object is.In order to solve the problem of fragmentation, the CMS collector will have some sorting parameters, and then this.5, the various parameters when finishing: -xx:+ usecmscompactatfullcollection After the full GC, do a cl

inference is: if you can not defragment, long-running programs will eventually encounter memory fragmentation, resulting in memory space waste and memory allocation speed of the problem; To solve this problem, you need to be able to defragment the memory. If you decide to solve the problem of fragmentation, then you can directly choose Mark-compact, or mainly with Mark-sweep Plus with mark-compact to back

check whether the user's caches/logs folder is incorrectly redirected to the local, if the network home folder backup time is at night... Sort out Disk (http://www.coriolis-systems.com/iDefrag.php) if it is an AD authentication problem, then you should increase the AD server and assign users to different server authentication. Debugging of OD/AD authentication, odutil set log debug | odutil set log default (dirt -u username -n）（dirt -m "/Active Directory/All Domains" -u activedirectoryusernam

: 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:+USEPARNEWGC: Set Young on behalf of the parallel collection. Can be used concurrently with CMS collection. JDK5.0 above, the JVM

servers. The older generation is recommended to be configured as a concurrent collector because the concurrent collector does not compress and defragment the disk, so it is recommended to configure:-XX:+USECONCMARKSWEEPGC #并发收集年老代-xx:cmsinitiatingoccupancyfraction=80 # Represents the age-old generation of space to 80% when it begins to execute cms-xx:+usecmscompactatfullcollection # Open the compression of older generations. Performance may be affec

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collector, that is, how many threads are garbage collected together. This value is best configured with the number of processors-XX:+USEPARALLELOLDGC: Configure the old Generation garbage collection method for parallel collection. JDK6.0 supports parallel collection of older generations. (The concurrency collector is mainly to ensure the response time of the system, reduce the time of garbage collection downtime.) It is suitable for application server, telecom field and so on. -XX:+USECONCMARKS

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:cmsfullgcsbeforecompaction=5-xx:+ Usecmscompactatfullcollection -xx:cmsfullgcsbeforecompaction: Because the concurrent c

generates temporary swap files on the hard disk and uses the hard disk space that the file occupies for virtual memory. The Virtual memory management program frequently reads and writes to the hard disk, producing a large amount of fragmentation, which is the main cause of disk fragmentation. Other settings, such as temporary files or temporary file directories that are generated when browsing information from IE browsers, can create a large amount of fragmentation in the system. File fragmenta

-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:+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

guarantees, so the old age is generally used to mark-clean or mark-sorting algorithm.The following diagram is a good introduction to the various GC collectors of JDK6 and their respective features:1. Replication algorithms are used in the Cenozoic2. The CMS uses the tag-purge algorithm, because the tag cleanup algorithm generates memory fragmentation, so the JVM provides parameters to enable the CMS to clean up after a few cleanup-xx:cmsfullgcsbeforecompaction: Because the concurrent collector

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

In the morning, Windows OneCare beta is installed on Windows xp pro SP2 (enlish-edition) of the virtual machine. As the core of computer security in Microsoft's live Strategic Plan, Windows OneCare includes firewall, Windows Update, and backup.(To prevent the page from being opened, click to view the large image) OneCare Live startup Screen The taskbar icon of OneCare Live. Green indicates that there is no problem at all. Yellow indicates that there is a problem, but it is not so important.