From: Robert Fridman (fridman@ucalgary.ca)
Date: Wed May 15 2002 - 17:15:03 EDT
I have an ES45 (5.1a pk 1) with 4 GB of RAM and 4 GB of swap. It's
reporting that swap is below 10%. But I'm not quite sure where the
memory is tied up:
bash[es27]# swapon -s
swap space below 10 percent free
Swap partition /dev/disk/dsk0b (default swap):
Allocated space: 524510 pages (4.00GB)
In-use space: 197 pages ( 0%)
Free space: 524313 pages ( 99%)
Total swap allocation:
Allocated space: 524510 pages (4.00GB)
Reserved space: 496292 pages ( 94%)
In-use space: 197 pages ( 0%)
Available space: 28218 pages ( 5%)
This shows 4 GB of swap, with most of it reserved. Since lazy swap
allocation is used, swap should not be touched unless RAM is
exhausted. So this seems to imply that 4GB RAM and 4 GB of swap are
used.
bash[es27]# vmstat -i 1
swap space below 10 percent free
Virtual Memory Statistics: (pagesize = 8192)
procs memory pages
intr cpu
r w u act free wire fault cow zero react pin pout in sy
cs us sy id
10 233 34 478K 4095 30K 80M 1M 69M 203K 2M 144 145 1K
940 23 4 73
13 230 34 478K 4095 30K 1 14 18 0 23 0 46 40
295 100 0 0
12 231 34 478K 4098 30K 2 0 0 0 1 0 5 77
105 100 0 0
12 231 34 478K 4098 30K 0 0 0 0 0 0 3 30
81 100 0 0
According to this I have 3734 MB (478000 * 8 / 1024 ) of active
pages, 32 MB of free pages and 234 MB (30000 * 8 /1024) of wired
memory. This is about 4 GB. So I should still have 4 GB of swap left.
Since this machine has local disks which are heavily used, part of
the VM (about 2GB) is used by the UBC.
bash[es27]# vmstat -P
swap space below 10 percent free
Total Physical Memory = 4096.00 M
= 524288 pages
Physical Memory Clusters:
start_pfn end_pfn type size_pages / size_bytes
0 362 pal 362 / 2.83M
362 524279 os 523917 / 4093.10M
524279 524288 pal 9 / 72.00k
Physical Memory Use:
start_pfn end_pfn type size_pages / size_bytes
362 544 scavenge 182 / 1.42M
544 1210 text 666 / 5.20M
1210 1329 data 119 / 952.00k
1329 1529 bss 200 / 1.56M
1529 1535 cfgmgmt 6 / 48.00k
1535 1536 locks 1 / 8.00k
1536 1550 pmap 14 / 112.00k
1550 3222 unixtable 1672 / 13.06M
3222 3318 logs 96 / 768.00k
3318 11587 vmtables 8269 / 64.60M
11587 524279 managed 512692 / 4005.41M
============================
Total Physical Memory Use: 523917 / 4093.10M
Managed Pages Break Down:
free pages = 4099
active pages = 142418
inactive pages = 102433
wired pages = 30561
ubc pages = 233362
==================
Total = 512873
WIRED Pages Break Down:
vm wired pages = 6677
ubc wired pages = 0
meta data pages = 15681
malloc pages = 3860
contig pages = 2730
user ptepages = 1080
kernel ptepages = 526
free ptepages = 7
==================
Total = 30561
So why am I not seeing the 8GB of VM as I think I should???
Robert.
-------------------------------------------------------
Robert Fridman fridman@ucalgary.ca
MACI Cluster Computing Systems Administrator
Netera Alliance
University of Calgary
Phone: (403) 220-6779 Fax: (403) 282-9199
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