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тАО05-05-2005 03:34 AM
тАО05-05-2005 03:34 AM
This machine runs 6 instances of Oracle with plenty of disk space. I have attaced the kernel parameters... Any and all help would be greatly appreciated.
Darren
[PAL:/]swapinfo -tm
Mb Mb Mb PCT START/ Mb
TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME
dev 4096 0 4096 0% 0 - 1 /dev/vg00/lvol2
dev 2048 0 2048 0% 0 - 1 /dev/vg00/lvol9
reserve - 6144 -6144
memory 9795 9290 505 95%
total 15939 15434 505 97% - 0 -
CPU Util S SR RU | 28% 22% 64%
Disk Util F F | 57% 26% 100%
Mem Util S SU UB B | 90% 90% 91%
Networkil U UR R | 97% 96% 98%
--------------------------------------------------------------------------------
MEMORY REPORT Users= 3
Event Current Cumulative Current Rate Cum Rate High Rate
--------------------------------------------------------------------------------
Page Faults 249 123887 51.8 62.4 1725.2
Page In 25 48244 5.2 24.3 1007.8
Page Out 0 0 0.0 0.0 0.0
KB Paged In 0kb 1.0mb 0.0 0.5 172.7
KB Paged Out 0kb 0kb 0.0 0.0 0.0
Reactivations 0 0 0.0 0.0 0.0
Deactivations 0 0 0.0 0.0 0.0
KB Deactivated 0kb 0kb 0.0 0.0 0.0
VM Reads 0 67 0.0 0.0 10.4
VM Writes 2 780 0.0 0.3 11.2
Total VM : 11.5gb Sys Mem : 1.93gb User Mem: 6.96gb Phys Mem: 11.9gb
Active VM: 4.33gb Buf Cache: 1.79gb Free Mem: 1.25gb Page 1 of 1
Solved! Go to Solution.
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тАО05-05-2005 04:18 AM
тАО05-05-2005 04:18 AM
Re: Swap Utilization 90% + all the time
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тАО05-05-2005 04:20 AM
тАО05-05-2005 04:20 AM
Re: Swap Utilization 90% + all the time
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тАО05-05-2005 04:24 AM
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тАО05-05-2005 04:27 AM
тАО05-05-2005 04:27 AM
Re: Swap Utilization 90% + all the time
RED ALERT 05/05/05 11:08:22 Global swap space is nearly full
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тАО05-05-2005 04:28 AM
тАО05-05-2005 04:28 AM
Re: Swap Utilization 90% + all the time
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тАО05-05-2005 04:34 AM
тАО05-05-2005 04:34 AM
Re: Swap Utilization 90% + all the time
As Mr. Stephenson stated, "total" is a pseudo-swap, it's nothing. It's there to fool applications :)
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тАО05-05-2005 04:43 AM
тАО05-05-2005 04:43 AM
Re: Swap Utilization 90% + all the time
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тАО05-05-2005 05:33 AM
тАО05-05-2005 05:33 AM
Re: Swap Utilization 90% + all the time
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тАО05-05-2005 05:54 AM
тАО05-05-2005 05:54 AM
Re: Swap Utilization 90% + all the time
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тАО05-05-2005 06:20 AM
тАО05-05-2005 06:20 AM
Re: Swap Utilization 90% + all the time
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=26968
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=456768
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=763197
http://docs.hp.com/en/TKP-90202/ch08s01.html#d0e2720
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тАО05-05-2005 07:40 AM
тАО05-05-2005 07:40 AM
Re: Swap Utilization 90% + all the time
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тАО05-05-2005 07:43 AM
тАО05-05-2005 07:43 AM
Re: Swap Utilization 90% + all the time
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тАО05-05-2005 08:36 AM
тАО05-05-2005 08:36 AM
Re: Swap Utilization 90% + all the time
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тАО05-05-2005 08:42 AM
тАО05-05-2005 08:42 AM
Re: Swap Utilization 90% + all the time
If so, you can get these errors if yo don't use memory windows ....
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тАО05-05-2005 09:02 AM
тАО05-05-2005 09:02 AM
Re: Swap Utilization 90% + all the time
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тАО05-05-2005 07:27 PM
тАО05-05-2005 07:27 PM
Re: Swap Utilization 90% + all the time
The best way in Oracle to avoid massive memory drain is to avoid queries that involve full table scans, by judicious use of indexes.
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тАО05-06-2005 12:54 AM
тАО05-06-2005 12:54 AM
Re: Swap Utilization 90% + all the time
If you do a brk(), create a shared mmap/sysV segment, whatever of X Mb... the system will reserve X Mb of swap so it knows that if the time ever comes for vhand to do something with it, it will have the room to do so. If that reservation fails, the allocation request is also failed (with ENOMEM) which is what happened to Oracle, apparently. You can screw up a system without ever using any actual RAM by just starting programs that make huge malloc's... hence the max*siz tunables, process rlimits to prevent malicious users (or naive undergrads).
Adding more swap space increases the virtual address space for such allocations.
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тАО05-06-2005 02:14 AM
тАО05-06-2005 02:14 AM
Re: Swap Utilization 90% + all the time
I'm definitely not a kernel expert, however I was always taught that it is normal for a system to "Page-out", however if it "pages-in" constantly then you have a memory problem? Also the number of "Page Faults" suggests that VHAND has "Paged-out" because the requested data no-longer resides in RAM. Any ideas?
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тАО05-06-2005 06:53 AM
тАО05-06-2005 06:53 AM