Memory management and garbage collection are critical points for the JVM, and it is important to understand the basic strategies of memory management and garbage collection for the analysis of Java performance. This article describes the memory management and garbage collection of Sun JVM 6.0.1. Memory ManagementIn the process of running the program, will create a large number of objects, these objects, mostly short-period objects, a small part of the long-period objects, for short-cycle objects
Transferred from https://my.oschina.net/fhd/blog/289945
Examples are as follows:
Package test;
public class Gen
Package test; public class Gendemo {public static void main (string[] args) {* * in Java7 and later versions, the generic type can be omitted from the constructor, as in the following
In this way, * only a pair of angle brackets
Let's analyze some of the code in the example above.
First, notice how this line of code declares the gener
Memory Management and garbage collection are critical aspects of JVM. For Java performance analysis, it is very important to understand the basic memory management and garbage collection policies. This article describes Sun JVM 6.0 memory management and garbage collection.
1. Memory ManagementDuring the program running, a large number of objects are created. Most of these objects are short-lived objects and a small part are long-lived objects. For short-lived objects, garbage collection needs to
Graphic details Unity3d in material tiling and offset is what's going onTiling and Offset overviewTiling represents the magnification of the UV coordinates, offset represents the starting position of the UV coordinates.This, of course, is ineffective.The following uses the *.3DS file as the model, describes the tiling and offset exactly what is going on.3DS Format parsingFor example, I have such a tank_pla
Failure phenomenon:
The 3DMAX 2010 software unexpectedly shuts down while it is open and running.Reason Analysis:
First, verify that the user's 3DMAX 2010 accidental shutdown Occurs when the software is turned on or when the software is running.
Solution:
First, in the Open 3DMAX 2010, prompted the software problems caused by the 3dmax unexpected shutdown:
First, verify that the machine is configured to meet the system requirements of 3DMAX 2010, (note attached to the 3DMAX2010 syste
Before using openscenegraph, I tried to import the hierarchy in the 3DS model to my
ProgramI learned a lot. Yesterday, when studying the openscenegraph 3DS plug-in, I found that the plug-in was not as perfect as I thought. I was annoyed by the loss of all the hierarchies when calling the file. After trying to modify the 3DS plug-in, I feel that a new plug-in is
No lights the world will be a dark, in the 3D scene is the same, exquisite model, real material, perfect animation, if there is no light to illuminate everything is useless, so that the application of lighting in the scene replay is the most important step is not excessive. In addition, lighting is not only a place to add lighting in the scene, if so 3DS Max provided the default lighting is enough. In fact, the role of lighting is far more than this,
First, the following preparations need to be done:1. Install a full version of 3D Max with Visual Stdio.I installed 3D MAX 2012, it is best to find a full version, because the full version of the learning materials and the SDK for learning, very convenient. The two development of 3D MAX has a correspondence with the requirements of VS, which can be found in the SDK documentation, the VS development version of 3D Max 2012 should be vs 2010, making sure that vs 2010 is already installed on the PC,
atmosphere will reflect more blue on the object, so that its color gets colder. This effect can be achieved by using the tint material of min or RGB in 3DS MAX.
(2) light is additive. The more colors the light is mixed, the more white the light is. The color of the pigment is reduced. The more the mixed pigment, the more black it is.
(3) RGB model and cym model (A, white cloth, overshoot of light selection, B, gain =-1 ).
4. black and gray: because t
For the implementation of hotspot Vm, there are only two types of GC in it:
Partial GC: does not collect the entire GC heap Mode
Young GC: Only GC of young gen is collected.
Old GC: Only GC of Old Gen is collected. Only the concurrent collection of CMS is in this mode.
Mixed GC: Collect GC of the entire young Gen and some old
old according to the life cycle, according to the result of the statistic distribution law, the new and old regions can adopt different recycling strategies and algorithms, strengthen the recovery and processing intensity of the new region, and strive for the short time interval, the smaller memory area, At a lower cost, a large number of newly discarded local objects on the execution path are reclaimed in a timely manner. Hypothetical prerequisites for the generational algorithm:1, a large num
How to manage the log (Redolog file) group in a RAC environment
Tuesday, 2004-09-14 11:52 eygle
Original connection:
Http://www.eygle.com/faq/How.To.Mangement.redologfile.in.Rac.Raw.htm
This article briefly describes how to manage log files in a RAC raw device environment (Redolog file)
This article environment: Oracle9i RAC + VCS4.0 + VxVM4.0 + Solaris9.0 + SunFire210
1. You can first view the current raw equipment situation
# vxprintdisk group:oradgty NAME ASSOC kstate LENGTH ploffs St
Yield command. You can pause a function and return intermediate results. The function that uses this command will save the execution environment and restore it if necessary.
The generator is more powerful and complex than the iterator, so it takes some time to understand it.
See the following code:
[Python]Def gen ():For x in xrange (4 ):Tmp = yield xIf tmp = 'hello ':Print 'World'Else:Print str (tmp)
Def gen
new and old according to the life cycle, according to the result of the statistic distribution law, the new and old regions can adopt different recycling strategies and algorithms, strengthen the recovery and processing intensity of the new region, and strive for the short time interval, the smaller memory area, A large number of newly discarded local objects on the execution path that are not used at a lower cost are promptly reclaimedHypothetical prerequisites for the generational algorithm:1
Reprinted from: http://baike.baidu.com/view/179088.htm
3D Studio MAX, often referred to as 3DS MAX or Max, is a PC-based 3D animation rendering and production software developed by Autodesk. Its predecessor was the DOS-based 3D Studio software. The latest version is 2011. Prior to the appearance of Windows NT, industrial CG production was monopolized by SGI graphics workstations. The emergence of the 3D Studio MAX + Windows NT combination suddenly
reason on by reducing the number of places where a context switch can happen.The code for the co-process is almost as simple as synchronizing the code, but without the overhead of the thread. And the co-process makes concurrency easier because it reduces context-switching scenarios.Review the Code of the co-process again from tornado import Gen@gen.coroutine def Fetch_coroutine (URL): http_client = Asynchttpclient () response = yield Http_c
= gen_generator() print ret, type(ret) #
ret = gen_value() print ret, type(ret) # 1
From the code above, we can see that,gen_generatorThe function returns a generator instance.
Generator has the following special features:
• Following the iterator protocol, the iterator protocol needs to be implemented__iter__ , Next interface
• It can be accessed multiple times and returned multiple times to pause code execution in the function body
The test code is as follows:
>>> Def gen_
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