JVM principle and optimization, and JVM principle Optimization
The jvmjob principle and special point are that the operating system is installed with jvmthrough jdk's java.exe, and the following four steps are used to complete the JVM environment.
1. Create a JVM loading environment and Configuration
2. Load
SQL Server Profiler (Profiler) helps database administrators track specific events that are performed by SQL Server databases, monitors the behavior of the database, and saves these valuable information to a file or table for later analysis to resolve problems with the database. Optimizes the performance of the database engine. This step-by-step article describes how to use SQL Server
The Oracle stored procedure needs to be written recently, as required by the company. I am a novice, after the completion of the writing of the stored procedure, it is necessary to analyze the execution time of each statement in the stored procedure in order toOptimize the entire stored procedure.Due to the use of Plsql Developer client tools, and most of the internet is introduced by the manual method of applying the profiler, using relatively chores
The JVM's full name is Java Virtual Machine (Java VM), which shields the software and hardware differences associated with each computer platform.
in the coming days, I'll learn the JVM in the form of blogging, to make myself more aware of the Java
This series of articles is "Deep analysis of Javaweb Technology Insider" and "in-depth understanding of Java Virtual Machine" Summary, welcome everyone to spit together, progress together
JVM runtime memory structure and JVM runtime Memory Structure
1. JVM Memory Model
JVM runtime memory = shared memory zone + thread memory Zone
1). Shared Memory Zone
Shared Memory zone = persistent band + heap
Persistent tape = method zone + others
Heap = Old Space + Young Space
Young Space = Eden + S0 + S1
(1) Pers
A. Waitfortargetfps:Vsync (vertical sync) function, which displays the CPU wait time of the current frameB. Overhead:Profiler overall time-the total record time for all items. Used to record unclear time consumption to help further refine profiler statistics.C. Physics.simulate:CPU elapsed time of the physical simulation of the current frame.D. Camera.render:CPU consumption of the camera rendering readinessE. Rendertexture.setactive:Sets the rendertex
Problem description
The Unity project often chooses to use Lua as a more logical script in practice. This is because Unity itself is less friendly to heat, more flexible with Lua heat, and simpler to share code and data with the server. At present, many different Unity + Lua integration programs, the practice of using a lot of Pang classmate's Slua program.
Teams that use Lua tend to be "heavier" integrations, exposing a sizable engine interface to Lua, so logically enough freedom to have full
large problem is divided into multiple thread block processing, each block of the number of threads is not too small, like this article only 1 threads, which is a huge waste of hardware resources. An ideal solution is to divide n thread blocks, each with 512 threads, to decompose the problem, often more efficiently than a single thread parallel processing or a single piece of parallel processing. This is also the essence of CUDA programming.
The above analysis of the performance of the method
Usually debug SQL, using Profiler used to, but now with a machine does not have Profiler installed, and tried to install again, add new features, but no profiler options, recently debugging really can not bear to see the code logic debugging, so the internet search, found a solution, put here, As an alternative:In the case of a SQL Server installation package, us
Tags: disco net text http speed data start time NTS database applicationOriginal: SQL Performance Detection Tool: SQL Server Profiler and Optimization tool: Database Engine Tuning Advisor I. Summary of TOOLS? database application system performance is low, it needs to be optimized,?? If you do not know where the problem is, you can use the Performance Detection Tool SQL Server Profiler.? If you know where t
Java applications are running on the JVM, but do you know anything about JVM technology? This article (the first part of the series) describes how classic Java virtual machines work, such as: the pros and cons of Java authoring once, Cross-platform engines, garbage collection basics, classic GC algorithms, and compiler optimizations. The following article will talk about
Tags: Profiler Performance Performance Analyzer tuning performance calibrationSQL Server Profiler-performance tuningPerformance has enough reason to become a hot topic. Today's business is fiercely competitive, and if users think that an application is too slow, they will immediately turn to another vendor. To meet the user's requirements, SQL Trace loads the event classes that can be used to find and debug
Tags: Profiler deadlock deadlock Trace transactionSQL Server Profiler-Debug DeadlockTracking generic exceptions is simple, but dealing with deadlocks is difficult, with a deadlock message number of 1205 and a severity of 13. The only suggestion that the server can "rerun the transaction" is that it cannot get enough data from the server to help determine what exactly happened and why it happened, even if th
Article Source: Http://www.mongodb.org/display/DOCS/Database+Profiler
Just contact with MongoDB, have used the profile, but not so detailed to read this document, may be the size of their own system is not large enough, if the traffic will inevitably let us look at some performance problems, this time we need to consider the MongoDB Profile, the following begins a detailed analysis: What is the database Profiler
Tags: Table performance event gem database file user Condition program1. Open SQL Server Management Studio, select Tools->sql Server Profiler, or direct from path: Start/program/microsoft SQL Server R2/performance Tools/sql Server Profiler.2. After connecting to the database, directly open the tracking new interface, or in the path: file--New tracking under Add tracking, connect to the database3. Click on t
Tags: file http img Local image HTTPS student engine MSSThe recent project to do thousands of students to face recognition record (currently about 630000 lines) query the last record, it is conceivable that the performance of this piece is a problem. As a shen, get to SQL Server Profiler and Database Engine Tuning Advisor These two jobs are QI.Start to install force ...First, a SQL statement that performs less efficientlySave trace files from SQL Serv
The JVM is the heavy load machine behind Java features and performance, which most developers take for granted. However, few of us understand how the JVM works-like task assignments and garbage collection, turning threads, opening and closing files, interrupting and/or JIT compiling Java bytecode, and so on.
Not being familiar with the JVM will not only affect a
attention to the bottom of the implementation, the novice programmer as long as familiar with the basic use of methods, you can quickly develop on-line; but for senior programmers, the practice of internal strength is more important , such as algorithms, design patterns, underlying principles, and so on, only after these basic proficiency, in the development process can know its why, when problems can quickly locate the nature of the Problem.For Java programmers, Spring family barrels can almos
all operating systems, with the latest version being 12.0.6.
The download interface is as follows:
Download and install:
After the installation is completed a run will be prompted to authorize the software, for individual users can actually free use Yourkit Java Profiler, simply fill in the download page below the appropriate authorization information to obtain authorization code, as shown:
After authorization, the run will display the Welcome pag
Brief introduction
Starting with IBM I 7.1, IBM Classic Java Virtual Machine is no longer supported by IBM I. The IBM Technology for Java Virtual Machine (also known as the IBM J9 JVM) became the only supported JVM. This article is intended to illustrate the differences between the two JVMs, while helping users and developers migrate their applications from the Classic
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.