lmr tuning

FineReport performance tuning methods, finereport Performance TuningThe basic idea of FineReport performance optimization is to properly set the memory size of the application server. Generally, the default memory configuration of the server is relatively small. In larger application projects, this memory is not enough. Therefore, you need to increase the memory size during processing. The memory configuration methods for each application server are d

First, diagnostic tools 1. Warning Log file Warning log files contain system information and error logs that contain important errors (such as: ORA-600) and block checksum error messages (ora-1578,ora-1498). Monitor database operations such as CREATE DATABASE, STARTUP, SHUTDOWN, ARCHIVE log, and RECOVER, and record Non-default initialization parameter values. When Log_checkpionts_to_alert is set to true, the warning log file also records the start and end times of checkpoints, incomplete checkpo

JVM Tuning ToolsJconsole,jprofile,visualvmJconsole: The JDK comes with a simple function, but it can be used with a certain load on the system. The garbage collection algorithm has a very detailed tracking. For more information, see hereJprofiler: Commercial software, you pay for it. Powerful. For more information, see hereVisualVM: The JDK comes with powerful features similar to Jprofiler. Recommended.How to TuneObserve memory release, collection cla

11 simple Java performance tuning techniques, java Tuning Most developers naturally think that performance optimization is complex and requires a lot of experience and knowledge. Well, it cannot be said that this is completely wrong. Optimizing applications to achieve optimal performance is not easy. However, this does not mean that you cannot do anything without such knowledge. Here are 11 easy-to-follow s

Become a Java GC expert (5)-Java Performance Tuning principle, gc Tuning Not every program needs optimization. If the performance of a program is the same as expected, you don't have to put extra effort into improving its performance. However, after the program debugging is completed, it is difficult to immediately meet its performance requirements, so we have to tune the job. Regardless of the programming

In the case of performance problems with Oracle databases, it is less effort to use Oracle's own toolkit to give reasonable tuning recommendations.Tuning Advisor is optimized for the execution plan of the input SQL setThe Accsee Advisor is a recommendation on how much performance is improved if SQL set is introduced into an index or partition at this moment.SQL Tuning Advisor is a suggestion from the one ha

Performance Tuning: IO consumption analysis, performance tuning io consumption Performance Tuning-> how to analyze io consumption Reprinted please indicate the source: http://blog.csdn.net/supera_li/article/details/45225077For more information about the performance tuning series, see.Performance Optimization: Analysis

Tags: style c tar ext a intHow to use Oracle's Dbms_sqltune package to run SQL Tuning Advisor for SQL automatic tuning1 ". Here's a simple example of how dbms_sqltune is used.First execute the next SQL that you want to tune, and then get the SqlidSql> SELECT * from V$sqltext where sql_text like ' select * from dual% ';ADDRESS hash_value sql_id command_type PIECE sql_text---------------- ---------- ------------- ------------ ---------- ----------------

Linux memory basic knowledge and related tuning solutions, linux TuningMemory is one of the important components in the computer and serves as a bridge to communicate with the CPU. All programs in the computer run in the memory, so the memory performance has a great impact on the computer. Memory is used to temporarily store computing data in the CPU and data exchanged with external memory such as the hard disk. As long as the computer is running, the

Sysctl. conf for learning and tuning, and sysctl. conf for tuning Reproduced in the short book: sysctl. conf learning and tuning. If you have any version problems, please contact mePreface Remember the first contact/etc/security/limits.confAnd/etc/sysctl.confThis is because kernel parameters must be modified as needed during Oracle deployment. The limits. conf fi

MYSQL Enterprise common architecture and tuning experience sharing, mysql tuning Experience Sharing 1. Select Percona Server, MariaDB or MYSQL Mysql application source: http://www.jinhusns.com/Products/Download? Type = xcj 1. Three storage engines of Mysql MySQL provides two storage engines: MyISAM and InnoDB, MySQL4 and 5 using the default MyISAM storage engine. From MYSQL5.5, MySQL has changed the defaul

The individual believes that JVM tuning is primarily addressed by the following methods1. Set the appropriate maximum heap memory (maximum and value for Cenozoic and Laosheng generations) and minimum heap memory (the operating system memory size consumed by JVM startup), and set the scale allocation of the heap.2, set up the suitable new generation because of its impact on the system performance and GC recovery has a certain effect.3. Set the appropri

MySQL performance tuning and Architecture Design-the idea and solution of the High Availability design in Chapter 17th, mysql Tuning Chapter 1 High Availability design ideas and solutions Preface: The database system is the core part of an application system. To ensure the overall availability of the system, the database system cannot have any problems. For an enterprise-level system, the availability of th

Optimized tuning of TCP/IP and kernel parametersThere are many ways to optimize TCP/IP and kernel parameters under Linux, the configuration of parameters can greatly improve the performance of the system, and can also be optimized according to specific scenarios, such as time_wait, DDoS attacks and so on.The following configuration is written in sysctl.conf and can be used with sysctl-p.The relevant parameters are for reference only, the specific valu

Tags: sdn is ola visible reason water personal tuning tunToday, while watching Tri Hua's SQL optimization book, he saw a case in which he solved the SQL performance problem, and Tri Hua the teacher successfully positioned the problem and solved it. Here, on the basis of Tri Hua teacher analysis and positioning, do further analysis and reasoning, so that we can study and discuss together, the following is a brief description of the case scenario. 1. SQ

A basic knowledge1.1 What is performanceBefore performance tuning, let's start by understanding what performance is. With regard to performance, I think everyone who has studied Java can list a few points and even talk about it. In the Java TM Platform performance, the following five aspects are defined as criteria for judging performance:1) The performance of the operation--which algorithm performs the best performance?2) Memory allocation-How much m

tuning needs to focus on several aspects of memory tuning CPU using tuning lock competitive tuning I/O Tuning Fundamentals: The number of objects to be transferred to the old age is minimized. Reduce the execution time of full GC. The goal is to minor GC time within 100MS an

Database Tuning tutorial (4) Explain performance analysis command, tuning explain In the previous chapter, we learned how to find slow queries and record statements into logs. How can we know where statement problems occur after slow queries are found. This chapter describes how to use the database performance analysis commands provided by Mysql to analyze SQL statements. Ii. Explain commands for database

Supports SQL tuning and SQL TUNING A friend of mine found me a few days ago and said that an SQL Performance problem exists to see if it can be optimized. The process is as follows: Snow Leopard 9:35:10 Are you there? Orchid island master 15:07:39 I forgot. What's the matter? Snow Leopard 15:07:49 Hmm Snow Leopard 15:07:54 Database Optimization Problems Orchid island master 15:08:04 Oh, you said. Snow Leopa

MySql Performance Tuning (5) demonstration of using a proper lock mechanism for table locks, mysql Tuning MySql locks take the following forms: 1. Table-level locks; low overhead, fast locking; no deadlock; large lock granularity, the highest probability of lock conflict, the lowest concurrency. The MyISAM engine belongs to this type. 2. Row-level locks: high overhead and slow locking; deadlocks may occur;