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memory upgrade

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yash123
Regular Advisor

memory upgrade

Hi all,
model rp3440
memory 16x2GB => 32GB
Since memory usage is abovr 95 % we are planning to increase memory to 48 GB
since all the memory slots are filled what is the best way to increase 48 or 64 GB
9 REPLIES
yash123
Regular Advisor

Re: memory upgrade

Sorry model is rp4440
OH_2
Occasional Contributor
Solution

Re: memory upgrade

You have a choice of 16 DIMM or 32 DIMM slot memory board on RP44xx servers

DIMMs in an array must be same type and size

Memory Options

1 GB DDR memory quad (4Ã 256 MB DIMMs) A7128A
2 GB DDR memory quad (4Ã 512 MB DIMMs) A7129A
4 GB DDR memory quad (4Ã 1 GB DIMMs) A7130A
8 GB DDR memory quad (4Ã 2 GB DIMMs) A7131A
16 G B DDR memory quad (4Ã 4 GB DIMMs) AB560A

Double check with your HP supplier for RP44xx option support.
yash123
Regular Advisor

Re: memory upgrade

Hi OH
thanks for the immediate reply.

is it possible for the below combination for 48 GB
slot GB
0 4x2 8
1 4x2 8
2 4x4 16
3 4x4 16

64GB

0 4x2 16
1 4x2 16
2 4x4 16
3 4x4 16

is the above combination is OK then we need to through some 2 GB memeory
please provide the valued input
OH_2
Occasional Contributor

Re: memory upgrade

RP4440 Config rules - check Quickspec on HP website

Memory must be installed in groups of four DIMMs, also known as quads.
Each quad must consist of equal density DIMMs

Memory can be ordered in quads of 1 GB (4Ã 256MB), 2 GB (4Ã 512MB), 4 GB (4Ã 1GB), 8 GB (4Ã 2GB), or 16 GB (4x4GB) Minimum memory is 1 GB (4Ã 256 MB)

Maximum memory is 128 GB, using eight 16 GB memory quads in memory carrier board A9739B

Memory must be loaded in the order depicted on the memory carrier board.
Arrange DIMMs so that the quads with the largest capacity are in the lowest numbered slots.
yash123
Regular Advisor

Re: memory upgrade

current usage if around 95% how much we need to increase.
also can we mix 2 gb and 4 GB
Dennis Handly
Acclaimed Contributor

Re: memory upgrade

>current usage if around 95% how much we need to increase.

While adding memory is probably always a good idea, are you having any performance problems?
Do you want to put more of a load on the system?
Are you getting out of swapspace errors?
What does "swapinfo -tam" show?

What HP-UX version are you using?
(You do know the whole purpose of an OS is to make sure memory is 100% used, for cache and other things.)
yash123
Regular Advisor

Re: memory upgrade

there is no swap error, but performance issue is there
hp ux 11.23

swapinfo -tam
Mb Mb Mb PCT START/ Mb
TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME
dev 16384 0 16384 0% 0 - 1 /dev/vg00/lvol2
dev 32768 25 32743 0% 0 - 0 /dev/vgSwap/lvSwap
reserve - 19237 -19237
memory 32766 21312 11454 65%
total 81918 40574 41344 50% - 0 -
Dennis Handly
Acclaimed Contributor

Re: memory upgrade

>but performance issue is there

That'll be a good reason to add memory if you are doing lots of paging.
Right now you don't seem to be using any device swap. Can you get that swapinfo when it's busy?
yash123
Regular Advisor

Re: memory upgrade

Hi Denni,
thanks
I doubt swapspace is not using completely.
Glance report shows memory is 96% used
CPU Util S SN N | 58% 63% 70%%
Disk Util F F | 13% 16% 18%
Mem Util S SU UB B | 98% 98% 98%
Networkil U UR R | 49% 49% 49%

MEMORY REPORT Users= 1
Event Current Cumulative Current Rate Cum Rate High Rate
--------------------------------------------------------------------------------
Page Faults 9542 30189 1223.3 778.0 1431.0
Page In 16 16 2.0 0.4 683.6
Page Out 0 0 0.0 0.0 0.0
KB Paged In 64kb 64kb 8.2 1.6 8.2
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 1 1 0.1 0.0 0.1
VM Writes 0 0 0.0 0.0 0.0

Total VM : 18.6gb Sys Mem : 5.0gb User Mem: 18.4gb Phys Mem: 32.0gb
Active VM: 13.0gb Buf Cache: 8.0gb Free Mem: 667mb Page 1 of 1