TruGuru's,
I have two systems running Oracle8 and Oracle8i (under Oracle Financials
11i), on a DS20 (2x6/500, 2G RAM) and ES40 (2x5/600, 2G RAM) respectively.
I think I need more RAM, but with Oracle's reputation for eating any
available memory and my lack of understanding of vmstat and vmubc, I'm not
100% convinced.
The systems usually maintain a "load average" below 1, but frequently, in a
bursty fashion, spike up to 3-5 for short periods of time. Of course Oracle
is always the dominant process. vmstat indicates to me that there is very
little (30K pages) memory, but there is almost no paging out to swap which
is under 10% in-use. vmubc shows that half of the "active" memory is
inactive.
My thoughts are that if I add a bunch of memory either the systems wills
scream as I have never seen or Oracle will just gobble up any additional
memory and the systems will continue to run as they currently are.
Below is a snippet of a "vmstat 5" command on each system:
DS20
procs memory pages intr cpu
r w u act free wire fault cow zero react pin pout in sy cs us sy
id
3 316 35 204K 30K 20K 64M 5M 32M 2M 18M 34K 56 829 439 6 1
93
3 316 35 204K 30K 20K 2 16 17 0 28 0 13 484 480 1 0
99
3 316 35 204K 30K 20K 5 0 1 0 1 0 19 170 221 0 0
100
3 328 35 204K 30K 20K 258 0 51 0 12 0 15 397 231 0 1
99
3 328 35 204K 30K 20K 0 0 0 0 0 0 11 212 221 0 0
100
3 328 35 204K 30K 20K 0 0 0 0 0 0 9 271 178 1 0
99
3 324 35 204K 30K 20K 18 1 0 0 1 0 18 159 214 0 0
100
3 320 35 204K 30K 20K 48 1 10 0 2 0 26 184 250 0 0
100
3 319 35 204K 30K 20K 0 0 0 0 0 0 9 117 152 0 0
100
3 316 34 204K 30K 20K 68 1 0 0 1 0 15 190 222 0 0
100
3 322 34 207K 27K 20K 3629 173 3002 0 471 0 152 1K 726 7 3
90
3 320 34 207K 27K 20K 23 0 1 0 7 0 186 1K 621 1 1
98
3 319 34 206K 27K 20K 24 0 1 0 0 0 71 598 320 1 0
99
ES40
procs memory pages intr cpu
r w u act free wire fault cow zero react pin pout in sy cs us sy
id
3378 26 209K 12K 34K 101 0 101 0 0 0 8 1K 273 1 1
99
3378 26 209K 12K 34K 101 0 101 0 0 0 9 755 322 1 1
99
3378 26 209K 12K 34K 101 0 101 0 0 0 3 524 276 0 1
99
3378 26 209K 12K 34K 101 0 101 0 0 0 9 715 288 0 1
99
3378 26 209K 12K 34K 101 0 101 0 0 0 12 1K 306 1 1
98
3377 26 209K 12K 34K 101 0 101 0 0 0 9 238 248 0 1
99
3377 26 209K 12K 34K 101 0 101 0 0 0 8 260 241 0 1
99
3377 26 209K 12K 34K 101 0 101 0 0 0 9 259 247 0 1
99
3378 26 209K 12K 34K 101 0 101 0 0 0 11 1K 288 1 1
99
3378 26 209K 12K 34K 101 0 101 0 0 0 9 552 282 0 1
99
3378 26 209K 12K 34K 101 0 101 0 0 0 11 679 311 1 1
99
3379 26 209K 12K 34K 101 0 101 0 0 0 10 1K 327 1 1
98
3379 26 209K 12K 34K 101 0 101 0 0 0 9 1K 282 0 1
99
Note that the systems are idle at this time of day.
What are your thoughts?
Douglas L. Thomas
dthomas_at_glgt.com
Received on Thu Nov 01 2001 - 23:25:27 NZDT