zfs fragmentation

Oracle Database Table fragmentation required Recently, a mysql user asked me if the table in the Oracle database needs to be split regularly because of the storage of the Oracle data table. Unlike the clustering organization table (IOT) used in mysql (innodb) to store data, it uses a method called HEAP to store data. Data rows are stored in random blocks. the data rows read during full table scan are not sorted in a certain way. therefore, Oracle can

Oracle Database fragmentation management, **************************************** **************************************** 1. tablespace fragments ************************************** **************************************** ** ---- 1. view the fsfi value select. tablespace_name, trunc (sqrt (max (blocks)/sum (blocks) * (100/sqrt (count (blocks), 2) fsfi from dba_free_space, dba_tablespaces bwhere. tablespace_name = B. tablespace_nameand B. content

Python syntax fragmentation (2 ),1. Usage of super If a subclass overrides a method, the subclass generally calls the override method. Sometimes super is used to call the method of the parent class. Super (DetectionModelHelper, self). _ init _ (** kwargs) # Call the initialization function of the parent class 2. collections. namedtuple Common tuple is accessed through index, and named index can be accessed through name FpnLevelInfo = collections.named

# Include 10132-file fragmentation solution Report: Calculate the result length Len based on the input, and combine any two fragments to make the result equal to Len and put it in map. Finally, traverse the map and output the maximum value!

In 2.6.20-rc6, the patch submitted by Mel Gorman introduces zone_movable to prevent zone memory fragmentation. Zone_movable indicates that this zone can only be allocated and used with the _ gfp_highmem and _ gfp_movable labels. This limits all non-movable pages to a single memory area, while the allocation of movable is met by other memory areas. This patch can be used with the linked list-based anti-fragment patch. The size of the movable zone is

)UicollectionelementkindsectionheaderUicollectionelementkindsectionfootern also need to register a class and remove the view from the queue-RegisterClass:forSupplementaryViewOfKind:withReuseIdentifier:-RegisterNib:forSupplementaryViewOfKind:withReuseIdentifier:-DequeueReusableSupplementaryViewOfKind:withReuseIdentifier:forIndexPath:The size of the header and footer is configured as follows:1) can be configured globally with the following properties@property (cgsize) headerreferencesize@property

];if (sz.width 16: Use of a string with attributes (nsmutableattributedstring)1. Create object NSString *original = @ "Are you all right today?"　　"; nsmutableattributedstring *attrtitle = [[Nsmutableattributedstringalloc] initwithstring:original];2. Set the Color (　　　　　　Nsforegroundcolorattributename to set the color, value for value, range for scope)/** Other settings: 1.NSForegroundColorAttributeName//color 2.NSFontAttributeName//font 3.NSBackgroundColorAttributeName//Background color//There a

(IMAGEFETCHQ, ^{__weak uicollectionview *weakcollection; NSData *imagedata = [NSData datawithcontentsofurl:[nsurl urlwithstring:imageurl]; UIImage *image = [UIImage imaGewithdata:imagedata]; if (image) {Dispatch_async (Dispatch_get_main_queue (), ^{[Event Setobject:im Age forkey:@ "image"]; Updating the model here [Weakcollection Reloaditemsatindexpaths:@[indexpath]]; }); } }); } return cell;6: How to get someone else app picturesA: Open itunes on

haveequalnames = (!self.name !person.name) | | [Self.name IsEqualToString:person.name]; BOOL haveequalbirthdays = (!self.birthday !person.birthday) | | [Self.birthday IsEqualToDate:person.birthday]; return haveequalnames haveequalbirthdays;} #pragma mark-nsobject-(BOOL) IsEqual: (ID) object { if (self = = object) { return YES; } if (![ Object Iskindofclass:[person class]] { return NO; } return [self Isequaltoperson: (person *) object];} -(Nsuinteger) hash { return [self.name hash

it is currently rendered into text tones): @property (weak, nonatomic) Iboutlet Uibarbuttonitem *mycollectionitem; UiImage *collectionitemimage=[uiimage imagenamed:@ "Bottomcollectionnormal"];collectionitemimage=[ Collectionitemimage imagewithrenderingmode:uiimagerenderingmodealwaysoriginal];self.mycollectionitem.image= Collectionitemimage;10:navigationcontroller the current page is hidden after the jump back page is also hiddenCurrent page Hide code: [Self.navigationcontroller Setnavigationbar

*stringarray=[newurl componentsseparatedbystring:@ "//"]; if (Stringarray.count>1[[stringarray objectatindex:1] isequaltostring:@ "BackHome"]) {[Self webJa Vascriptbackhome]; }} return YES; Note: Better iOS JS interactive third-party plugin webviewjavascriptbridge[Good instructions on how to use this plugin: http://www.henishuo.com/webviewjavascriptbridge-detail-use/]; You can use Safari to debug in iOS development debugging inline WebView It can be set up the development Mode menu, Deve

pushviewcontroller:loginviewcontroll Animated:yes];10: In the introduction of the third party TCWEIBOSDK newspaper linker command failed with exitCode1 (use-v to see invocation)Because of the repeated introduction of the Libtcweibosdk class library, Targets-project-build Phases-link Binary with libraries, there are three libtcweibosdk, can delete libtcweibosdk-i386.a11:nsuserdefaults Store min nsdictionaryNote: The data types supported by Nsuserdefaults are NSString, NSNumber, NSDate, Nsarray,

) Btnaction: (ID) Sender { self.myView.frame = CGRectMake (0,44, 0); [Self.view AddSubview:self.myView]; [UIView animatewithduration:0.3 animations:^{ self.myview.backgroundcolor=[uicolor Redcolor]; Self.myView.frame = CGRectMake (0,44, +); } completion:^ (BOOL finished) { }];}rotation and scaling of 3:uiviewLabel.transform = Cgaffinetransformmakerotation (*m_pi/180.0);//clockwise rotation 90 degrees Label.transform = Cgaffinetransformmakerotation (*m_pi/180.0);/

up all documents and library files. When the iphone restarts, all of the TMP files are discarded. View method: Method 1, you can set the display hidden files, and then open directly under the Finder. Here's how to set up viewing hidden files: Open terminal, enter name (1) command to display Mac hidden files: Defaults write Com.apple.finder Appleshowallfiles-bool true (2) command to hide Mac hidden files: Defaults write Com.apple.finder Appleshowallfiles-bool false (3) After you click Enter to e

scrolling first insert an element in front of this element for the last [self.imgdatalist insertobject:[self.imgdatalist objectatindex: ([self.imgdatalist COUNT]-1)] atindex:0]; In the latter one, add a previous first one because the above has been inserted a value so the first one becomes the second so here is 1 [self.imgdatalist addobject:[self.imgdatalist objectatindex:1]; The added number is used to process the total width of the defined scrolling view content int imag

();//Opening a dialog box also requires a delayTimer3. Start (); } Private voidTimer3_tick (Objectsender, EventArgs e) {Timer3. Stop (); Mouseandkeysimulator.presskey (Keys.enter,true);//Save the picture with the default file name, and if you want to save it, you have to simulate the keyboard input file nameMouseandkeysimulator.presskey (Keys.enter,false); Timer4. Stop ();//this is to handle the next picture, the code here withheldTimer4. Start (); }When you disc

, carry. Length); foreach(CharCinchcarry) {Console.Write (c+"\ t"); }////////////////////////Unmanaged Codeextern "C"__declspec (dllexport)voidDoArray2 (CharCarry[],intlength) { for(intI=0; i) {printf ("%c\t", Carry[i]); Carry[i]='?'; }}Breakpoint tracking, broken in DoArray2 (Carry,carry. Length) at the call, the distribution of carry in unmanaged code is as follows:0x01d4bab8-A-xx-------------XXThen in the unmanaged code realm, the array carry address is displayed as:0x004adc70-

Many people in order to allow the system to maintain a long-term stable and efficient operation, often will be the temporary files of IE and virtual memory files to the non-system disk. Such operations can actually reduce disk fragmentation in the system, but there are other ways to transfer temporary files and virtual memory files, which are unusual environment variables. Open methods for environment variables: Right-click the user variable above t

In the browser, once we add the nodes to the document.body (or other nodes), the page will update and reflect this change, for a small number of updates, a circular insert will also run well, is also our common method. The code is as follows: Copy Code code as follows: for (Var i=0;ivar op = document.createelement ("span"); var otext = document.createTextNode (i); Op.appendchild (Otext); Document.body.appendChild (OP); } However, if we want to add a large amount o

Maybe you've seen HTML5 pictures broken animation effects, the principle of implementation is quite simple. But you should not have seen the video can also be broken into a reorganization, this HTML5 animation is to use the relevant characteristics of canvas, to achieve the click of the mouse to make video fragmentation reorganization effect. Click the mouse in the video area, you can let the video of the area broken, after a period of time, the broke