Sponsored Content
Full Discussion: storage disk details
Operating Systems Linux Red Hat storage disk details Post 302606209 by sds9985 on Saturday 10th of March 2012 01:07:03 AM
Old 03-10-2012
The easiest way to get a clear picture of your storage layout would be to run:
Code:
pvs
vgs
lvs
mount
cat /proc/swaps

Could you please post the output of these commands?

/dev/sda is certainly the internal drive and by default /dev/sda1 is /boot and /dev/sda2 is a physical volume with the volume group VolGroup00 which contains the logical volumes LogVol00 and LogVol01. LogVol00 shows up as /dev/dm-0 and is typically used for the root filesystem (/) and LogVol01 is /dev/dm-1 and is typically used as swap. But the above commands will confirm this.

There doesn't appear to be any external storage in use on this system.

As to your performance problem, if the configuration assumptions above are correct, then you have minimal I/O activity to the root filesystem, but a ton of activity to dm-1, the swap partition.

Simply put, when Linux starts to run out of free memory it moves pages to and from disk space in the swap partition. If the system is actively paging, performance will be awful. (Memory access is about a million times faster than disk access).

Running:

Code:
free -m
sar -B
vmstat

will give you a quick view of your memory and swap usage. Please post the output of that, too.

Based on the limited information presented I'd bet your problem is that the system doesn't have enough RAM to properly support the application and the system is actively paging to/from swap. Under those circumstances, performance will be lousy. Some static use of swap space is OK, but active paging activity is to be avoided at all costs.

Last edited by sds9985; 03-10-2012 at 02:12 AM..
 

6 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Details on available disk

Hi everybody.. I am looking for an alternative command to 'format' since this is allowed only to the root user. How do I do to get the same information as command format does here below ? AVAILABLE DISK SELECTIONS: 0. c0t0d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848> ... (4 Replies)
Discussion started by: Riddick61
4 Replies

2. Shell Programming and Scripting

Disk space details from Unix to Outlook

Hi Friends, I am using sun Solaris . I want to find the disk space (df -k) for the Unix box and the data has to be sent to an email id. Can u please find me a code that checks the disk space 6 times a day, loads the data into an excel sheet and sends to an email id. Can u also tell me how to... (2 Replies)
Discussion started by: sridharnr
2 Replies

3. Solaris

Need Hard Disk Details

Hi freinds, What is the command to find out the hard disk details (logical name, FS type etc,). Because i connected one ntfs partition and i don't know the hard disk logical and physical name to mount it.Kindly do the needful. Thanks | P.Bharathiraja. :mad: (2 Replies)
Discussion started by: bharathiraja
2 Replies

4. Solaris

Disk Storage Need to Add more Disk

Hi, Anyone can help me, just want to confirm, if possible adding a disk storage that we have a RAWDATA with +ASM in our database. If possible, what would you recommend "workaround used" from us to do and the preparation. And also how long the downtime will take. Our disk continuous to grow,... (0 Replies)
Discussion started by: fpalero
0 Replies

5. AIX

Command to get Disk Adapter details in AIX

Hi, What is the command to get the disk adapter performance details in AIX?. Guide me. (2 Replies)
Discussion started by: maruthu
2 Replies

6. Shell Programming and Scripting

Script to monitor the disk space details in HP-UX

Hi, I need to monitor the disk space details in HP-UX . I need a command on how to display the information on below format File System Total_Space_KB Used_Space_KB Available_Space_KB %Used /u05 524288000 376235344 138799427 73% /u02 ... (0 Replies)
Discussion started by: ali560045
0 Replies
metaimport(1M)															    metaimport(1M)

NAME
metaimport - imports disk sets into existing Solaris Volume Manager configurations SYNOPSIS
metaimport -s setname [-n] [-v] [-f] [disks...] metaimport -r [disks...] metaimport -V metaimport -? The metaimport command allows the importing of disk sets, including replicated disk sets, into an existing Solaris Volume Manager configu- ration. Replicated disk sets are disk sets created using remote replication software. The default Solaris Volume Manager configuration specifies a maximum number of disk sets that can be configured. The metaimport command fails if importing the disk set would result in exceeding the number of disk sets configured on the system. To increase the number of disk sets allowed on a system, see the . Use metaset(1M) or metastat(1M) to view the configuration of the imported set. You must run metaimport as root. metaimport requires a functional Solaris Volume Manager configuration before it runs. The following options are supported: -f Force the import, even if a quorum of replicas from the imported disk set is not available. This option could result in corrupt configurations and should only be used when metaimport fails with the "Insufficient quorum detected; exiting" error. If only a partial disk set is available, this option might be necessary to successfully import. Some or all data could be corrupted or unavailable when importing a partial set or a set lacking a replica quorum. -n Does not actually perform the operation, but shows the output or errors that would have resulted from the opera- tion, had it been run. -r Report on the non-configured disk sets found on the system. If no disk device or LUN is specified, metaimport reports on all non-configured disk sets attached to the system. When the name of one disk is specified, metaimport reports on the disk set (or virtual LUN) containing the specified disk. If two or more disks are specified, metaim- port reports on the set (or sets, if they belong to different disk sets) containing the specified disks. If two or more disks are specified, metaimport reports on the set (or sets, if they belong to different disk sets) containing the specified disks. -s setname Specify the disk set name to use when importing. The imported disk set will be called setname, without regard to the name it may have had on a different system. -v Verbose. Provides detailed information about the metadb replica location and status. -V Version information. -? Display a help message. Example 1: Importing a Disk Set The following example creates a disk set called blue and identifies c1t5d0 as a disk containing a state database replica from the disk set being imported. # metaimport -s blue c1t5d0 Example 2: Reporting Disk Sets to Import The following example scans all disks and LUNs attached to the system and configured as part of the system. It scans for disks that could be part of a disk set to be imported. Components that are already part of the Solaris Volume Manager configuration are ignored. This use of metaimport provides suggested forms of the metaimport command to use to actually import the disk sets that have been found. You can specify a component on the command line to reduce the scope of the scan and generate results more quickly. # metaimport -r 0 Successful completion. >0 An error occurred. See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWmdu | +-----------------------------+-----------------------------+ |Interface Stability |Stable | +-----------------------------+-----------------------------+ mdmonitord(1M), metaclear(1M), metadb(1M), metadetach(1M), metahs(1M), metainit(1M), metaoffline(1M), metaonline(1M), metaparam(1M), metarecover(1M), metareplace(1M), metaroot(1M), metaset(1M), metasync(1M), metattach(1M), md.tab(4), md.cf(4), mddb.cf(4), attributes(5) 16 May 2005 metaimport(1M)
All times are GMT -4. The time now is 03:03 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy