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monitoring | design
Summary: This paper presents a real-time monitoring system based on OS kernel service and multithread technology, which solves the problem that the previous monitoring system can not recover the abnormal webpage in time. The Transmission control part and monitor
Inotify: An efficient, real-time Linux file System event Monitoring Framework Overview-Why do I need to monitor the file system?In daily work, people often need to know that there are changes in some files (clips), such as:
Notification configuration file changes
Track changes to some critical system files
Monitor the overall usage of a partition disk
Automatic cleanup when the system c
();} A more comprehensive check can be achieved with the addition of a bean implementation healthindicator, and now access to the health endpoint is as follows:http://localhost:8080/health{ "status""Tair" "TFS" "OK"} As long as there are some basic environmental checks in each service, I can quickly complete 7 x (Domestic environment + foreign environment) x (pre-release environment + production environment) health check with a few lines of script, and it is very convenient to l
and provide "awr,ash,sql in the Oracle database monitor"and many other diagnostic tools, you can see through what the database is doing, and even know the performance load of any time zone in the last 30 days and what the database is doing.Although there are excellent monitoring tools like "zabbix,pmm" in MySQL, they can only reflect some performance data curves of database history, for example, TPS is high, temporary tables are used more, there are
selected process, switching the kernel executionl; Specifies that all files opened by the selected process are equivalent to lsofT: Show hierarchy of ProcessesA: Used to bind the specified process to a CPU H: Hide or show the user's threadK: Hide or show kernel threadsP: Sort by CPU percentM: Sort by memory usage percentageT: Sort by Time lengthOptions:-D #: Delay time, that is, the length of the brush screen-U USERNAME: Displays only the processes of the specified
Tags: github password via translate system color task statistics CPU loadEarlier, we mentioned that there are many Linux system monitoring tools that can be used to monitor system performance. But we estimate that perhaps more users will tend to have tools with most Linux distributions (Top command).The top command is a real-time task Manager under Linux, and is also a common system
variety of connection information, if you want to monitor the remote server, to enter their IP address, domains (domain name), user (username), Password (password), because it is local monitoring, we check to select Local machine. Click "OK" to create a connection,Tip: If you want to modify the properties of a connection, you can change it by first selecting the connection and then tapping the Tools menu o
In the network application, sometimes needs to the user equipment network state to carry on the real-time monitoring, has two purposes:(1) Let users understand their own network status, to prevent some misunderstandings (such as the use of strange applications incompetent)(2) According to the user's network status of intelligent processing, save
process (%) (nice/total) *100%sys in internal time period, kernel time (%) (system/total) *100%iowait in internal time period, HDD io wait time (%) (iowait/total) *100%IRQ in internal time period, hard interrupt time (%) (irq/total) *100%soft in internal time period, soft interrupt time (%) (softirq/total) *100%idle in internal time period, the CPU is removed from waiting for the disk IO operation for any reason idle time idle time (%) (idle/total) *100The calculation formula is as followsTotal
IntroductionMost of the IO statistics tools under Linux, such as Iostat, Nmon, and so on, are only counted to the Per Device's read and write situations, and if you want to know how each process uses IO, it's a bit cumbersome.Iotop is a top class tool used to monitor disk I/O usage. Iotop has a UI similar to top, which includes information about PID, user, I/O, process, and so on.ExampleJust run it straight.IotopThe output is as followsTotal DISK READ
multiple CPUs at once.%steal:show the percentage of time spent in involuntary wait by the virtual CPU or CPUs while the hypervisor is Ser-vici Ng another virtual processor.%idle:show the percentage of time that the CPU or CPUs were idle and the system do not has an outstanding disk I/O requ Est.Intr/s:show The total number of interrupts received per second by the CPU or CPUs.Parameter interpretation get data from/proc/statCPU Processor IDUser's CPU time in internal time period (%), does not inc
= ' HTML ' , report_level = ' all ') as Reportfrom dual; SPOOL OFF
Examples of the output for each available is TYPE displayed below.
TEXT
Html
Xml
Active-active HTML isn't currently supported, but the parameter list, specifically BASE_PATH the, suggest it'll be suppor Ted in the future.
Report_sql_detailAlthough not documented as part of real-time SQL monitoring, th
Please refer to Git:https://github.com/firehol/netdata/wiki for specific netdata introduction.The following only describes the installation and use of Netdata under CentOS:1. Installation of the basic compilation environment required for installing NETDATA:Yum install zlib-devel gcc make git autoconf autogen automake pkgconfig2. Download and install Netdata (requires root access)cd/usr/local/src/(the directory you built is OK, not necessarily under this directory)wget http://firehol.org/download
usage (depending on the network size and traffic ).
Ntopng basic functions:
Automatically identifies useful information from the network;
Converts intercepted data packets into a format that is easy to recognize;
Analyzes communication failures in the network environment;
Measure the test taker's knowledge about the time and process of network communication.
Monitoring Engine for clean Separation
Reporting Facility.
Sturdy, collision engine
monitoring program is a console program, while the Silverlight client program displays real-time monitoring of SqlServerProfiler. The Silverlight client program communicates with the monitoring program through Socket. Due to restrictions on TCP communication, Silverlight must send policy requests to the
functions:
Automatically identifies useful information from the network;
Converts intercepted data packets into a format that is easy to recognize;
Analyzes communication failures in the network environment;
Measure the test taker's knowledge about the time and process of network communication.
Monitoring Engine for clean Separation
Reporting Facility.
Sturdy, collision engine (ntop is not true ).
Platform extension or script writing
You do not need
system is installed on the computer of the network administrator to perform various monitoring operations on networked computers. The client system is installed on each networked computer, it appears in the prompt area of the system taskbar as an icon, without affecting other operations on the workstation. It is only used to respond to monitoring commands on the server and according to service needs, the c
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