It can also be used to provide information about terminal tty input and output, and also. This document is based upon sparc solaris 10 obp all the following commands are to be run from the obp and not the os. In this post, well talk about interpreting this data. Jul 03, 2012 solaris os patching has been moved far away from the traditional methods from solaris 10 onwards. I have to compare iostat x output with a tool on solaris. Now there is column called wait in the output field which is showing zero. The iostat command generates reports that can be used to change system configuration to better balance the inputoutput load between physical disks. My application runs for a while, then goes into this state periodically for about 10 20 seconds. Iterating the output and summing up all the number present near the size. Unix file permissions explained sounds basic, but you may learn something new here. May 10, 20 solaris 10 interview questions may 10, 20 by lingeswaran r 8 comments here is the basic solaris interview questions which are commonly asked in solaris l1 or l2 level 1 or l2 interviews. The iostat command generates two types of reports, the tty and cpu utilization report and the disk utilization report. Installing solaris 10 version 0708v01 on sun netra t2000.
Some commands in solaris such as iostat report disk related information using disk names such as sd0 or sdd2. My understanding is that showrev p would show patches but not the date they were installed. For a detailed description of this command, refer to the iostat 1m man page how to display disk utilization information iostat. For a detailed description of this command, refer to the iostat1m man page how to display disk utilization information iostat. The patches that are listed in this chapter have been applied to the solaris 10 operating system in one of the following ways.
Is there a consistent way to map these names back to the standard devdskc. Dec 12, 2015 iostat command is a command that used for monitoring system inputoutput device loading by observing the time the devices are active in relation to their average transfer rates. Patch installation instructions for solaris systems sun. Displaying disk utilization information iostat oracle solaris. Linux iostat command help and examples computer hope.
Displaying disk utilization information iostat use the iostat command to report statistics about disk input and output, and to produce measures of throughput, utilization, queue lengths, transaction rates, and service time. We no need to bring down the server to single user mode if you are using live upgrade method during pathing and b efore choosing live upgrade,make sure you are using zfs as a root filesystem. That bug appears to have been fixed by patches in older revisions of. It is often used to identify performance issues with storage devices, including local disks, or remote disks accessed over network file systems such as nfs. Install the kernel patch of a solaris 10 update release is not the same as do an upgrade to the solaris 10 update release. To add and remove patches on solaris systems, use the patchadd and patchrm commands, which are provided with the os. With sar and iowait, we can get cpu time utilization. The iostat command will use the iso 8601 format yyyy mmdd instead.
Discovery maps the relationships between global and local solaris zones upon detection in the following example, a solaris global zone contains two local zones. Then start the iostat command with iostat xm 10 and watch the output. My application runs for a while, then goes into this state periodically for about 1020 seconds. The first report generated by the iostat command is the tty and cpu utilization report. Application of this patch should have succeeded this failure is unexpected. During execution of the kernel status command, the state of the system can change. It can also be used to troubleshoot a cpu performance issue as well. Example 2 using iostat to generate tty statistics the following command displays two reports on the activity of five disks in different modes of operation.
The table show which kernel patch revision is included in the solaris 10 update releases and there patch dependencies. Patches released after the solaris 10 1008 release can be found on the my oracle support. For an administrator to identify disk io as the bottleneck, the iostat command can be used. The first report generated by the iostat command provides statistics concerning the time since the system was booted. Since the iostat on solaris 10 has some different options, i will run all the commands you mentioned on solaris to see how the same info can be extracted from solaris iostat. I am looking for some tips or suggestions in how to do the following. But, when i executed both commands, i could see significant differences in their outputs. Displaying io statistics the iostat command displaying. Now using the following code to create a forever loop. For terminals collectively, the kernel simply counts the number of input and output characters. The iostat command generates reports that can be used to change system configuration to better balance the inputoutput load between physical disks the first report generated by the iostat command provides. Dear all, i have sun fire v240 server with solaris 10, i have raid 5 on three.
If you dont have a solaris setup to work,just install solaris as guest operating system on vmware workstations and get a hands on experience. You can also go through the below interface questions on specific category. Solaris 10 os patching using liveupgrade unixarena. How to use the linux iostat command to check on your storage. Use following command to startstop the iostat gathering persistently. The command iostat input output statistics help us to get started with analyzing a disk io bottleneck issue. Now, in order to create some load on my system this is what i am doing i am creating a file using dd command, the size of which is just half of the ram size. Because the x option is used, disks are identified by instance names.
While this linux command provides an absolute wealth of io information, the sheer amount of it all can make it hard to see the forest for the trees. Each local zone is represented by a physical solaris ci record and a virtual machine instance record. Displaying disk utilization information iostatuse the iostat command to report statistics about disk input and output, and to produce measures of throughput, utilization, queue lengths, transaction rates, and service time. The iostat command generates three types of reports. For a detailed description of this command, refer to the iostat 1m man page. As there was some fluctuation with storage, so to many errors which is. As amit points out, iostat n produces device names such as eg c0t0d0s0 instead of sd0. The iostat command can print a variety of different outputs, depending on which commandline options were used. The first report generated by the iostat command is the cpu utilization report. Most of the io errors for failing drives on the sun fire servers are related to a disk problem and not to disk backplane or cables. May 18, 2011 this article will help to investigate and confirm a disk failure in a solaris machine. Detecting hard or soft disk errors in solaris unix.
An io performance bottleneck can be due to a disk or even due to a hba or a hba driver. Dear all, i have sun fire v240 server with solaris 10, i have raid 5 on three scsi disk and 1 scsi for os. I am facing strange behaviour of iostat command and top command. The iostat create reports that can be used to change system configuration to better balance the inputoutput between physical disks. The patches that are listed in this chapter have been applied to the solaris 10 operating system in. Displaying disk utilization information iostat oracle. For you information,from solaris 11 onward,zfs will be the default root filesystem. They are only valid on sparc hardware that uses the openboot rmware. Solaris 10 1008 operating system patch list solaris 10. Realtime performance monitoring vmstat, iostat, mpstat etc. The iostat command can print a variety of different outputs, depending on which command line options were used. Please assess cause of failure and verify system integrity before proceeding. Solaris 10 1008 operating system patch list solaris 10 10. The iostat command is used for monitoring system inputoutput device loading by observing the time the devices are active in relation to their average transfer rates.
Solaris performance metrics disk utilisation by process. Linux performance monitoring with vmstat and iostat commands. What does it mean if iostat shows 100% busy wait but the cpu is completely idle. This document does not cover installation of solaris 10 environment patches, the cisco. The iostat is a part of the sysstat package, which is really just a file that is read by a. Iostat is one of the most useful command when troubleshooting a disk io performance issue.
Hi everyone, i try to calculate the total hard disk space of a solaris machine using iostat en command. These include sar, sadf, mpstat, iostat, tapestat, pidstat, cifsiostat and sa tools. Each subsequent report covers the time since the previous report. Ive been spending a lot of time lately looking at io performance and reading up about the iostat command. When i given iostat command it shows output as below and it shows %b. After you successfully install the solaris 10 image on the netra t2000 host machine, you can proceed to install the solaris 10 environment patches, the cisco bams 3.
The other column parameters which are important are average wait queue length avque, average wait queue time avwait, average service time avserv and % busy %busy. Does anyone know of a command that would show the list of patches installed and the date it was installed. Use the patchadd command to install a patch on a standalone system. This article will help to investigate and confirm a disk failure in a solaris machine. Last the development and stable versions include a patch to better handle.
For multiprocessor systems, the cpu values are global averages among all processors. The iostat command generates reports that can be used to change system configuration to better balance the inputoutput load between physical disks the first report generated by the iostat command provides statistics concerning. The solaris 10 1008 patch list provides a list of patches preapplied to the solaris 10 1008 release. If you are installing the solaris patch on a solaris 10 global zone, invoke the patchadd command with the g argument. The iostat command is used to monitor the load on server inputoutput io devices by observing the time the devices are active compared to the average transfer rate of the device. For solaris 11 release, refer to the man pages for instructions on using install and. This is a short overview of solaris 10 kernel patches.
The eeprom command can be used from the os to view or set openboot rmware variables. Use the iostat command to report statistics about disk input and output, and to produce measures of throughput, utilization, queue lengths, transaction rates, and. This document does not cover installation of solaris 10 environment patches, the cisco bams 3. The number of decimal places used by sysstat commands sar, cifsiostat. Here is the basic solaris interview questions which are commonly asked in solaris l1 or l2 level 1 or l2 interviews. Handy solaris commands hw config, swap, patches etc. Btw, the writing comes at an ideal time because i am working on some dtrace stuff to track io. Solaris 10 interview questions may 10, 20 by lingeswaran r 8 comments here is the basic solaris interview questions which are commonly asked in solaris l1 or l2 level 1 or l2 interviews. The first report generated by the iostat command provides statistics concerning the time since the system was booted, unless the y option is used in this case, this first report is omitted.
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