rails performance monitoring

Network monitoring is the most complex in all Linux subsystems, with too many factors, such as latency, blocking, conflict, and packet loss, even worse, the routers, switches, and wireless signals connected to Linux hosts all affect the overall network and it is difficult to judge whether the problem is caused by the Linux network subsystem or other devices, monitoring and network judgment are the most comp

platform, such as "Paradigm", "Class", "Interface", "module", "Property" and so on.JIT (Just in Time, instant compilation)When an app written in a high-level language is compiled to IL, the JIT compiler compiles the IL as a local instruction and executes it to maximize platform independence.. NET Platform framework has a natural cross-platform advantage, but Microsoft has made it a unique version of the Windows platform, and fortunately he is now taking the first step in open source and cross-p

platform, and compilers of various high-level languages (such as c#,vb,f#) on the. NET platform convert their textual representations to IL. A variety of different text forms are eventually unified to the way IL is expressed, including. NET platform, such as "Paradigm", "Class", "Interface", "module", "Property" and so on.JIT (Just in Time, instant compilation)When an app written in a high-level language is compiled to IL, the JIT compiler compiles the IL as a local instruction and executes it

Second " Add, select the resource to be monitored on this service. The following is a description of MySQL common counters See: Using LoadRunner to monitor MySQL database performanceHttp://hi.baidu.com/yanfei666666/blog/item/62c87200b201fe027bec2c09.htmlWhere to watch MySQL with SiteScopeHttp://hi.baidu.com/%C7%D0%D3%EA/blog/item/f6b431486953a42908f7efff.html Using LoadRunner to monitor MySQL database performancehttp://testingtop.com/space.php?uid=13do=blogid=214 LoadRunner How to monitor t

, generate a memory dump snapshot (heapdump file) of the virtual machine.5) JHAT:JVM Heap Dump Browser, which parses the Headdump file, establishes a http/html server that allows the user to view the results of the analysis on the browser6) Jstack:stack Trace for Java to generate a thread snapshot of the current moment of the virtual machine2. Visualization Tools1. Jconsle2. JVISULAVMRemote connection needs to be set for Java opt to use, see: http://www.cnblogs.com/Jtianlin/p/5021540.htmlJVM (4)

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

, the default monitoring is CPU resourcesPidstat-p 1 2 3-trLinux 2.6.32-71.el6.i686 (stephen-pc) 11/16/2011 _i686_ (1 CPU)07:37:04 AM tgid TID minflt/s majflt/s VSZ RSS%MEM Command07:37:06 AM 1-0.00 0.00 2828 1368 0.13 Init07:37:06 AM-1 0.00 0.00 2828 1368 0.13 |__init07:37:06 AM tgid TID minflt/s majflt/s VSZ RSS%MEM Command07:37:08 AM 1-0.00 0.00 2828 1368 0.13 Init07:37:08 AM-1 0.00 0.00 2828 1368 0.13 |__init07:37:08 AM tgid TID minflt/s majflt/s

Monitoring and Analysis of disk I/O performance in Linux 18:10:23Tags: Performance Monitoring Analysis Linux Disk Io Leisure SuSE Linux copyright statement: original works are not reprinted! Otherwise, legal liability will be held. In the past two days, I found that a server used for testing often has a high load, but

)Three use Jconsole monitor the running state1. We plan to set the total of the heap too small to 20M, the new generation and the old age of 10M. Because Survivor and Eden have a space ratio of 1:8 by default, Eden is about 8m,2 survivor each 1M. The following verifies that Jconsole's monitoring is consistent with our plans.(1) Total size of the heap:(2) Old age Size:(3) Eden Size:(4) Survivor size:Result: The expected plan was met.2. Other informatio

We know that system optimization is a complex, tedious, and long-term task. The following are common subsystems for monitoring:CPUMemoryIO Network The following are common monitoring tools Hybrid + hybrid + CjxwPkxpbnV4IM + 1 zbOw/hybrid + hybrid/Cw + hybrid/hybrid + CjwvcD4KPHA + PGVtPjxzdHJvbmc + pgltzybzcm9 "http://www.2cto.com/uploadfile/Collfiles/20140121/2014012108571641.jpg" alt = "n fast hang 'zookeeper k-Acceleration zookeeper-Zoo

A fully running Linux system consists of many subsystems (introduction, Cpu,memory,io,network, ...). ), monitoring and evaluating these subsystems is part of the performance monitoring. We often need macroscopic view of the whole system state, also need microscopic look at the operation of each subsystem. Fortunately, we don't have to reinvent the wheel to monito

program automatically creates a Slice.dat file in the current directory that contains the retransmission information every 15 seconds:# Tcptrace-xslice network.dmp# cat slice.dat date segs bytes Rexsegs rexbytes new Active------- --------------------------------------------------------16:58:50.244708 85055 4513418 0 0 6 616:59:05.244708 110921 5882896 0 0 0 216:59:20.244708 126107 6697827 0 0 1 316:59:35.244708 151719 8043597 0 0 0 216:59:50.244708 37296 19 80557 0 0 0 317:00:05.

schedule for a chart of active objects and arrays. Recorded production Recorded throughputDisplays the cumulative schedule of activities for the JVM to be produced and released over time. Garbage collection Activities GC activityDisplays an activity schedule for the garbage collection activity. Class ClassesDisplays the active timesheet for a chart with the loaded class. Thread ThreadsDisplays an activity schedule with a dynamic thread graph. CPU Loads CPU LoadDisplays

Linux performance monitoring study notes www.2cto.com Linux performance monitoring is generally divided into these aspects: 1. CPU 2. Memory 3. IO 4. Network these four aspects are independent of each other but affect each other. Common performance

completely different concepts. Many domestic reference books confuse these two concepts, swapping is also translated as swap. in the operating system, a program is fully switched to the hard disk to free up memory for use by new programs, and only partial pages of the program are exchanged with paging) is two different concepts. Pure swapping is hard to see in modern operating systems, because it is time-consuming, laborious, and unnecessary to switch the entire program to the hard disk, modern

Redis Performance Metrics monitoring commandsIn the process of learning, we must learn to use help frequently to understand the specific use of commands.1.info (monitoring typically uses this command to read data)127.0.0.1:6379> Help InfoINFO [Section]Summary:get information and statistics about the serversince:1.0.0Group:server127.0.0.1:6379> Info# Serverredis_v

the program automatically creates a Slice.dat file in the current directory that contains the retransmission information every 15 seconds:# tcptrace-xslice network.dmp# cat slice.dat date segs bytes Rexsegs rexbytes n EW Active---------------------------------------------------------------16:58:50.244708 85055 4513418 0 0 6 616:59:05.244708 110921 5882896 0 0 0 216:59:20.244708 126107 6697827 0 0 1 316:59:35.244708 151719 8043597 0 0 0 216:59:50.2 44708 37296 1980557 0 0 0 317:0

A fully running Linux system consists of many subsystems (introduction, Cpu,memory,io,network, ...). ), monitoring and evaluating these subsystems is part of the performance monitoring. We often need macroscopic view of the whole system state, also need microscopic look at the operation of each subsystem. Fortunately, we don't have to reinvent the wheel to monito

Linux performance monitoring and analysis tool background recently, a pre-developed system performance test is required. The system is deployed on the Linux server cluster. In high concurrency and high load scenarios, you can collect all the information (including CPU, memory, I/O, disk, and network traffic) occupied by each device... linux

Tool: linux performance monitoring tool-nmon, linux-nmon Nmon download: http://pan.baidu.com/s/1jICoSpo It can be run directly in linux. The nmon tool can display all important performance optimization information on a single screen and dynamically update it. The nmon tool allows AIX and Linux performance experts