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installation, pay attention to language selection when you can choose Chinese;1.4. Establish Oracle Connection (required)(1) Install Oracle client instantclient_11_2;Configure the System environment variable path and tns_admin are the installation paths for instantclient_11_2;To configure the Tnsnames.ora file, fill in the required database instance information as follows:(2) establishing an Oracle connectionIf you need to monitor the operating system synchronously, you need to enter the user n
Linux Performance Testing Tool iostat is part of the sysstat package. Iostat displays the average CPU time after the system is started, similar to uptime), and displays the usage of the disk subsystem. iostat is used to monitor CPU utilization and disk utilization.Linux Performance Testing Tool iostat% User: user-level application) CPU usage% Nice: CPU usage of the user level with nice priority added% Sys:
In the previous article, I gave a brief introduction to several aspects of Linux performance and how to solve them, but how do I find out from the system that something is wrong with a certain aspect or a few aspects, which requires the use of several common performance analysis tools provided by the Linux system Here is a detailed account of the use of several c
Linux There are many excellent tools to help us analyze the server performance indicators and assist in the development of debugging work. The following is only a list of commands that are relatively basic and are generally integrated in a Linux environment without having to be installed again. For more detailed commands, refer to Https://github.com/brendangregg/perf-to
There are many valid command-line tools in the Bin directory of the jdk, which are the encapsulation of the Jdk\lib\toos.jar class Library.first, jps: virtual machine process status tool, query out Lvmid.second, jstat: Virtual Machine Statistics monitoring tool,three, Jinfo:java Configuration Information toolView and adjust the parameters of a virtual machine in real Time.Iv. Jmap:java memory Image Tool: generating a heap dump snapshotNot only can you
code. Double-click helloworld :: init () can enter the program code ,. The 33rd lines of code shown in the figure are program code leaks, which are not difficult to find out.If we want to further evaluate the memory usage, we can look at the line chart of the allocations template. We can also see the memory usage of various variables at a certain time point. The heap (HEAP) memory usage in Area 4 is because the heap memory needs to be manually released, and the stack memory does not need to be
Linux Magazine uses four articles: part 1 and part 2) to introduce two Linux File System Performance testing tools, fdtree and iozone. Fdtree is rarely heard of, it can test ext3, ext4, nilfs2, btrfs, xfs, jfs, reiserfs, ext2, resier4 next five need additional tools xfs: xfsprogs pulled via git as of 9/5/2009, jfs: jfsutils-1.1.14, reiserfs: reiserfsprogs-3.6.21,
Chrome developer tools Timeline and profiles improve Web application performanceSecond, reduce the number of HTTP requestsWhen a user browses to a page, if we load some information into the client cache at one time when the user first accesses, when the user accesses other pages, it can greatly improve the page access speed, because each time the HTTP request is to incur the server cost, the common method is: merge Css,js, and as an external reference
Curl-loader Introduction Curl-loader (also known as "Omes-nik" and "Davilka") is an open source C language-written tool that simulates the application load and the behavior of thousands of hundreds of thousands of of people's Http/https and FTP/FTPS client applications, Each has its own source IP address. Instead, other Curl-loader use real C-written client-side protocol stacks, the Libcurl and Tls/openssl SSL http and FTP stack, which support the tools
Mysqlslap is MySQL's own benchmark tool, the advantages: query data, simple syntax, flexible and easy to use. The tool can simulate multiple clients concurrently issuing query updates to the server. The performance test data is given and the performance comparison of various engines is provided. MSQLSLAP provides an intuitive verification basis before and after MySQL pe
1. Introduction:Javamelody can monitor Java or Java EE application servers in a running environment. It is displayed as a graph: Java memory and Java CPU usage, number of user sessions, JDBC connections, and HTTP requests, SQL requests, JSP pages and Business interface methods (EJB3, Spring, Guice), average execution time, Error percentage, and so on. Charts can be viewed by day, week, month, year, or custom time period.2. Prepare:Download Javamelody-1.47.0.jar and Jrobin-1.5.9.1.jar, referenced
Three tools for performance monitoring in LinuxGuideHow to manage Linux Hosts? The 18 weapons can be regarded as Swiss Army knives. One or two weapons can be claimed. The most common one is the three brothers of the stat family. What are the main computer resources? CPU, memory, and disk? Although there are many cloud computing technologies, it is still necessary to start investigating whether a system is r
Mysql monitoring tools: zabbix + MPM (Performance Monitor for MySQL), zabbixmpm MPM is mainly used to monitor various mysql parameter performance indicators. The following describes the configuration of MPM and zabbix: The following figure shows the configuration file diagram. It consists of two parts: 1. zabbix template:Template_FromDual.MySQL.*.xml 2. MPM age
The following small series for everyone to bring a PHP debugging and performance analysis tools Xdebug detailed. Small series feel very good, now share to everyone, also for everyone to make a reference. Let's take a look at it with a little knitting. In the process of program development, the most commonly used debugging method is to use Echo, Print_r (), Var_dump (), printf () and so on to print the stat
language (DSL) specifically written for rulesIn version 5.0, the introduction of important functional modules such as Drools Funsion/flowrule1.2, why should learn drools?The rule engine is the framework for organizing business logic. It allows developers to focus on what they are sure of, rather than making decisions on some low-level mechanisms.Often, business users are more comfortable with things that make them understood to be right, relative to things that are expressed in the form of If..
established# View the socket that established the connectionRecv-q send-q Local address:port Peer address:port0 0 192.168.8.46:59073 60.2.235.195:61002timer: (keepalive,60min,0)0 0 192.168.8.46:52996 112.95.243.28:http0 0 192.168.8.46:51066 128.121.22.144:http0 0 192.168.8.46:38547 112.95.240.222:http0 0 192.168.8.46:49295 74.125.71.154:http0 0 192.168.8.46:46500 10.14.22.26:61300timer: (keepalive,48min,0)[Email protected]:~> sudo/usr/sbin/ss-l # shows all the listening socketsRecv-q send-q Loc
conceptual things: buffer and cache.What is the main buffer? Should be the data to be processed, mainly to deal with the problem of speed mismatch between 2 systems. The cache, in general, should be the caching of the resulting data, such as loading some information from the DB for querying.Swap partition, is to use the hard disk to do a portion of the cache, if swap is very frequent, that is, memory is not enough!List Description:PID process ID, user users, PR priority, VIRT virtual memory, RE
the TIME_WAIT state. When there are too many concurrent requests, there will be a lot of time_wait that can not be disconnected in time, which will consume a lot of port resources and server resources. Netstat-an|awk '/tcp/{print $6} ' |sort|uniq-c5 established5 LISTEN2048 time_waitVim/etc/sysctl.conf#开启重用, allowing connections to the TIME_WAIT state to be re-used for new TCP connectionsNet.ipv4.tcp_tw_reuse = 1#开启TCP连接中TIME_WAIT连接的快速回收Net.ipv4.tcp_tw_recycle = 1#控制同时保持TIME_WAIT套接字的最大数量Net.
large, you may need to add-j-xmx512m This parameter specifies the maximum heap memory, which is jhat-j-xmx512m-port9998/tmp/dump.dat. Then you can enter the host address in the browser: 9998 viewed:4. Jstat (JVM Statistical monitoring tool)Jstat [generaloption | outputoptions vmid[interval[s|ms] [count]]Vmid is the Java Virtual machine ID, which is generally the process ID on the Linux/unix system. Interval is the sampling time interval. Count is the number of samples. For example, the followin
PHP simple performance testing tools I. Overview nbsp; this class mainly detects the running time of a piece of code and some PHP efficiency problems. II. usage first, The require class mainly uses the interfaces begin (), preTime () and end () begin ($ output, $ environmen PHP simple performance detection tools. I.
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