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Tags: Linux grab tcpdump netstat view network status PS System State free memory usage Iostat disk performanceMonitoring IO Disk Performance命令如下：iostat -x 磁盘使用iotop 磁盘使用 %util look at the health of a hard drive, Installing Iotop[[emailprotected] ~]# yum install -y iotop Iotop command, mainly to see the io> column, see the performance of the disk

Tags: freepsnetstattcpdumpseven weeks two sessions (May 7)10.6 Monitoring IO Performance10.7 Free Command10.8 PS Command10.9 Viewing network status10.10 Linux under Grab BagExtended TCP three-time handshake four times wave http://www.doc88.com/p-9913773324388.htmlTshark several usages: http://www.aminglinux.com/bbs/thread-995-1-1.htmlMonitoring IO Performanceios

Tags: monitoring io performance FREE Command PS command View network status Linux under Grab BagMonitoring IO PerformanceIntroductionThe Iostat is primarily used to monitor the IO load on the system device, iostat the statistics from the start of the system startup when the first run, and then running Iostat displays s

nload Command (view network card traffic, with Sar-n DEV)(The system does not install this toolkit by default, yum install-y nload, install nload before installing epel-release)Use Nload to view network card information, you can see access to the network card information, press the Q key to exit.Monitoring IO Performance (disk)Installation: Sysstat package will be installed with Iostat (Iostat and SAR belong to a package)Iostat-x%util high value (insu

10.6 Monitoring IO Performance10.7 Free Command10.8 PS Command10.9 Viewing network status10.10 Linux under Grab BagFirst, Iostat and Iotop commandIostat command and Iotop, command to see the system disk work, timely discovery of disk problems, these two tools are not the system comes with, the need for Yum installationWhere the Iostat command is in the same (SYSSTAT) package as the SAR command mentioned in

I. Monitoring IO performanceIostat-x Focus on%utilIotop to see which process is reading and writingIi. free command (view memory usage)-M-H-GBuff buffer (CPU processed data > memory (Buff) > Disk)Cache caching (Disk > Memory (cache) >CPU processing data)Formula: Total= used + Free +buff/cacheAvaliable contains free and

busy. The number of concurrent connections to a website is how many clients are attached at the same time. Linux under Grab Bag Grab Bag Tool tcpdump There is no need to install this command: Yum install-y tcpdump Specify the NIC name Tcpdump-nn-i ENS33 After running the above command, there will be a dense string of strings, before pressing CTRL + C, these strings have been brushing the screen, the faster the brush screen indicates more p

state of the process).STAT (Status of the process) is:D cannot be interrupted.R (run) running process (CPU is used within a time period).The S (sleep) process may be paused and will be activatedT paused process (CTRL + Z paused process)+ Foreground ProcessZ Zombie ProcessN Low-priorityMemory is locked in memory pagingS master ProcessL Multithreading ProcessPS aux usage: see if a process is running (it has been used once) to see if top is runningps aux |grep topView network StatusNetstat viewing

One: Monitoring IO performanceIostat-x disk usageThe last column indicates that the time taken for the disk is longer thanIotop disk usageTwo: Free commandFrom left to right, total size, size used, remaining sizeThe remainder of the available=free+buffers/cachedTotal=userd+free+buffers/cachedThree: PS commandView syste