); Channel. Basicpublish ("", "Hello", null, body); Console.WriteLine ("[x] Sent {0}", message);}}}
If the client is started before the server is started, the message is stored in the queue, and the DAv. Use of RabbitMQ GUIDs1. A Web management tool (Rabbitmq_management), officially provided Http://www.rabbitmq.com/management.html 2, after the installation of RABBITMQ, the default is also installed the management tool, execute the
Oom?Java.lang.OutOfMemoryError:java head space heap memory overflowJava.lang.OutOfMemoryError:Permgen Space Java Eternal Overflow, that is, methods to overflow, generally because of the emergence of a large number of classes and JSPs, or the use of Cglib reflection mechanism,This can be resolved by changing the size of the method area and modifying it in the form of a similar-xx:permsize=64m-xx:maxpermsize=256m. In addition, too many constants, especially strings, can cause the method area to ov
Tsar is a collection of information on the server system and application of the collection reporting tools, such as the collection of server System information (CPU,MEM, etc.), as well as application data (Nginx, Swift, etc.), the collected data stored on the server disk, can always query historical information, Data can also be sent to the Nagios alarm.
Tsar can be more convenient to add modules, only need to follow the requirements of Tsar to write
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
shows the application and the process number, so you can find the process number by this command when you want to kill a process. the command parameters for Nethogs are as follows:Options-h Display available commands usage.-V Prints Version info.-D delay for refresh rate.-V Select view mode-P sniff in promiscious mode (not recommended).-T TraceMode.-C Limit number of refreshes-s sort by traffic sentThere are fewer commands to display the page, only a few:M cycle between display modes (KB/S, KB,
The monitoring server is a critical part of server management. By using the appropriate monitoring tools, you can detect server problems, evaluate the results of changes to site content, and plan upgrades to facilitate user access to the site. Select the appropriate monitoring tool
Installation:sudo add-apt-repository ppa: Ferramroberto/linuxfreedomlucidsudo apt-get update sudo apt-get install NetspeedThen in this way you can not find the launcher, so after research, this is only suitable for GNOME desktop use, if unity needs to install the following version:Unloadingsudo apt-get remove netspeedInstalling a unity-enabled versionsudo apt-add-repository ppa: Fixnix/netspeedsudo apt-get updatesudo apt-get Install Indicator-netspeed-unityStartIndicator-netspeed-unity It will t
Today introduced a Linux under the monitoring of real-time broadband use of software iftop,iftop can view the flow of dynamic, to help you solve, find the network slow problem.Of course, check the network card traffic tools and Iptraf, nethogs and so on, the main recommended today iftop!Software Installation:
cd/byrd/tools/wget http://www.ex-parrot.com/~pdw/ifto
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
During O M, people often experience server performance problems, such as I/O, CPU, memory, and network bottlenecks.
So how can system O M be done? The following tools are helpful for refreshing your mind ~ (@ ^ _ ^ @)~
(1) Top
Here, Rocky wants to clarify one point, and believes that the best practice of top is:
"Find the process that consumes the most CPU resources"
After finding it, press [p] and force it to be sorted by CPU usage
Different fro
updated to current
L
Time
Total CPU time used by the process, in seconds
M
time+
Total CPU time used by the process, Unit 1/100 sec
N
%MEM
Percentage of physical memory used by the process
O
VIRT
The total amount of virtual memory used by the process, in kilobytes. Virt=swap+res
P
SWAP
The size, in kilobytes, of the virtual memory that the process is using, swapped out.
Application Software Learning Summary
Directory
SVN deployment and use
One-Health installation Zabbix
Ansible automatic operation and Maintenance tool installation and use
PPTP server-side deployment to client connections using
Fail2ban installation Configuration
KVM Installation Use
Lvs+keepalived Construction
KEEPALIVED+LVS Maintenance skills and tuning
Introduction of the concept type of LVS and three kinds of working modes and 10 scheduling algorithms
Redis Single
Use of monitoring tools in percona-toolkit series
1. pt-deadlock-logger
Function introduction:
Extract and record mysql deadlock Information
Usage:
Pt-deadlock-logger [OPTION...] SOURCE_DSN
Collect and save the latest deadlock information on mysql. You can directly print the deadlock information and store the deadlock information to the database, the deadlock information includes the server where the deadlo
Original Address:CentOS Monitoring Tools Sar,iostat
Author:Every day down
Yum-y Install Sysstat
Whereis SAR
Whereis Iostat
You can see the relevant commands
If you install with RPM package under Redhat, you can go to http://rpmfind.net/to find the Sysstat RPM package.
Also attached: Linux disk IO View related commands and instructions
From:http://blog.chinaunix.net/u3/93062/showart_1934431.html
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Monitoring indicators
Metrics that typically require monitoring for performance testing include:
1. Server Linux (including CPU, Memory, Load, I/O).
2. Database: 1. Mysql 2.Oracle (Cache hit, index, single SQL performance, database [/url] threads, number of data pool connections).
3. Middleware: 1. Jboss 2. Apache (including number of threads, number of connections, log).
4. Network: throughput, throughput
Need to monitor Linux server system performance? Try these tools built in or attached to the system below. Most Linux distributions are equipped with a large number of monitoring tools. These tools provide metrics that can be used to obtain relevant information and system activities. You can use these
One of the primary goals of managing certificates is to improve the security level of the enterprise, where authentication and access management should be valued. In this article, we'll start with a brief overview of the CA definition, and then focus on the application of Windows Server 2008 with professional certificate monitoring tools (Pkiview.msc and Certutil.exe). For an enterprise, it is very importan
Need to monitor Linux server system performance? Try these tools built in or attached to the system below. Most Linux distributions are equipped with a large number of monitoring tools. These tools provide metrics that can be used to obtain relevant information and system activities. You can use these
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