- Community Home
- >
- Servers and Operating Systems
- >
- Operating Systems
- >
- Operating System - HP-UX
- >
- Re: Memory utilization confusion.
Categories
Company
Local Language
Forums
Discussions
Forums
- Data Protection and Retention
- Entry Storage Systems
- Legacy
- Midrange and Enterprise Storage
- Storage Networking
- HPE Nimble Storage
Discussions
Discussions
Discussions
Forums
Forums
Discussions
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
- BladeSystem Infrastructure and Application Solutions
- Appliance Servers
- Alpha Servers
- BackOffice Products
- Internet Products
- HPE 9000 and HPE e3000 Servers
- Networking
- Netservers
- Secure OS Software for Linux
- Server Management (Insight Manager 7)
- Windows Server 2003
- Operating System - Tru64 Unix
- ProLiant Deployment and Provisioning
- Linux-Based Community / Regional
- Microsoft System Center Integration
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Community
Resources
Forums
Blogs
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО12-13-2010 10:42 AM
тАО12-13-2010 10:42 AM
TYPE AVAIL USED FREE USED LIMIT RESERVE PRI FILE NAME
dev 4194304 2785150 1409154 66.40% 0 - 1 64 (major)
reserve - 1408402 -1408402
memory 1042614 1039458 3156 99.70%
Does this mean 99.7% of RAM is in use? Is this non-pageable allocation? If not I'd wonder why the system didn't just reduce the footprints of enough processes to accomodate another.
Solved! Go to Solution.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО12-13-2010 11:13 AM
тАО12-13-2010 11:13 AM
Re: Memory utilization confusion.
You are out of memory. You have 66% of your device swap utilized and all of real memory. I would look at your page-outs in 'vmstat'. Anything in double-digits or above means that you system is doing excessive paging and is further degraded.
Regards!
...JRF...
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО12-13-2010 11:46 AM
тАО12-13-2010 11:46 AM
Re: Memory utilization confusion.
vmunix: Deferred swap reservation failure pid:
Does the calculation count disk swap space along with memory? If so that means I could add more disk swap space and avoid this--not bad performance however-- in the future?
Are the in-use numbers swap-info return not including the amount "reserved" by lazy swap reservation?
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО12-13-2010 07:12 PM
тАО12-13-2010 07:12 PM
Re: Memory utilization confusion.
Now that said, performance will so bad that you may not be able to login or run commands for several minutes. If your Java code needs 4GB of space, virtually all processes will be swapped out and the Java code will thrash back and forth virtually freezing all other activity.
So this machine is badly undersized for the applications. I would start by finding out what the maximums will be when the machine is in production. If everything adds up to 4GB, add 5GB to your machine and performance should be acceptable...assuming that your application will have enough CPU to run parallel processes and threads.
Bill Hassell, sysadmin
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО12-13-2010 07:27 PM
тАО12-13-2010 07:27 PM
Re: Memory utilization confusion.
Looks like you need more RAM.
-Pramod.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО12-13-2010 09:00 PM
тАО12-13-2010 09:00 PM
SolutionIf memory is full, it is likely total swap is too.
>wonder why the system didn't just reduce the footprints of enough processes to accommodate another.
That's what you do for memory but not swap. (You can't swap swap. :-) Where is it going to put it? You are out of swap.
>vmunix: Deferred swap reservation failure pid:
>Does the calculation count disk swap space along with memory?
All swap requests count total swap. (That -t" above.)
>that means I could add more disk swap space and avoid this in the future?
Exactly.
>Are the in-use numbers swap-info return not including the amount "reserved" by lazy swap reservation?
Right. By using lazy swap you are cheating and on your own.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО12-14-2010 05:55 AM
тАО12-14-2010 05:55 AM
Re: Memory utilization confusion.
Mb Mb Mb PCT START/ Mb
TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME
dev 16384 9574 6810 58% 0 - 1 /dev/vg00/lvol2
reserve - 6069 -6069
memory 4073 1792 2281 44%
total 20457 17435 3022 85% - 0 -
#
So I'm thinking we should add another swap device and watch paging rates? Can this be done effectively with SAR or would you recommend vmstat?
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО12-14-2010 11:26 AM
тАО12-14-2010 11:26 AM
Re: Memory utilization confusion.
Bill Hassell, sysadmin
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО12-14-2010 12:56 PM
тАО12-14-2010 12:56 PM
Re: Memory utilization confusion.
Unfortunately your system wasn't as busy when you got this. And from the "dev" and memory differences, are you even on the same system?