Re: [nsp] Insufficient memory?

From: Alfredo Sola (alfredo@intelideas.com)
Date: Wed Feb 02 2000 - 13:29:56 EST


        Hi,

> Below is the output from 'show mem free' and 'show mem fail alloc' on all
> of the core routers in our network. My guess is that nodes 3,4, and 5 have
> insufficient processor memory. If so, should I install more DRAM, reduce
> the percentage of I/O memory, or both? Also, node 7's processor memory
> seems to be fragmented; can or should something be done about that?

        For nodes that show a Lowest near Free near Largest all the time (which means
no big variations in the buffers etc allocated there), and are still a couple
megs, I'd suggest to reduce the iomem. Besides this, as someone pointed
before, the best policy for memory is to the maximum that the box supports.

        For node 7 definately give more processor and less I/O. You may also want to
try another IOS in that box.

> Node 3, 4, and 5 are Cisco 2621 routers with 48mb of DRAM. I've read on the
> Cisco web site that the maximum is 64mb. I couldn't tell if that was total
> (including the 16mb on the motherboard), or 64mb total in the two slots.
> Which is it?

        2x32M will give you 64 megs. 48M looks like 16M in one slot plus 32M in the
other, so just remove the 16M piece and replace it with a 32M one.

> --- command output ---
>
> Node 1
> ------
> show mem free
> Head Total(b) Used(b) Free(b) Lowest(b) Largest(b)
> Processor 487B4 5990476 1242508 4747968 4386656 4121092
> I/O 600000 2097152 508116 1589036 1553652 1553184
>
> [show mem fail alloc listed nothing]
>
> Node 2
> ------
> show mem free
> Head Total(b) Used(b) Free(b) Lowest(b) Largest(b)
> Processor 60AD0C00 22213632 17080452 5133180 2620744 2432012
> I/O 40000000 16777216 2515396 14261820 14237744 14260384
>
> [show mem fail alloc listed nothing]
>
> Node 3
> ------
> show mem free
> Head Total(b) Used(b) Free(b) Lowest(b) Largest(b)
> Processor 8149CF3C 19280068 18673724 606344 127112 443612
> I/O 2700000 9437184 1999516 7437668 7379460 7436796
>
> show mem fail alloc
> Caller Pool Size Alignment When
> 0x8024E55C Processor 65496 0 16:28:05
> 0x8024E55C Processor 65496 0 16:28:05
> 0x8024E55C Processor 65496 0 16:28:05
> 0x8024E55C Processor 65496 0 16:28:05
> 0x8024E55C Processor 65496 0 16:28:05
> 0x8024E55C Processor 65496 0 16:28:05
> 0x8024E55C Processor 65496 0 16:28:04
> 0x8024E55C Processor 65496 0 16:28:04
> 0x8024E55C Processor 65496 0 16:27:17
> 0x8024E55C Processor 65496 0 16:27:17
>
> Node 4
> ------
> show mem free
> Head Total(b) Used(b) Free(b) Lowest(b) Largest(b)
> Processor 8149CF3C 19280068 18290976 989092 738100 721360
> I/O 2700000 9437184 1937752 7499432 7429628 7499388
>
> [show mem fail alloc showed nothing]
>
> Node 5
> ------
> show mem free
> Head Total(b) Used(b) Free(b) Lowest(b) Largest(b)
> Processor 8149CF3C 19280068 18519132 760936 681488 601156
> I/O 2700000 9437184 2090168 7347016 7320396 7346972
>
> [show mem fail alloc showed nothing]
>
> Node 7
> ------
> show mem free
> Head Total(b) Used(b) Free(b) Lowest(b) Largest(b)
> Processor 7298B0 26044240 20152628 5891612 3756480 196712
> I/O 6000000 16777216 1594236 15182980 15182980 15177120
> SRAM 1000 65536 63972 1564 1564 1564
>
> show mem fail alloc
> Caller Pool Size Alignment When
> 0x1E083C Processor 200000 0 4d01h
>
> Node 8
> ------
> show mem free
> Head Total(b) Used(b) Free(b) Lowest(b) Largest(b)
> Processor 60AD0C00 22213632 17723940 4489692 4322920 3098208
> I/O 40000000 16777216 1356776 15420440 15138056 15349340
>
> [show mem fail alloc showed nothing]
>
> Node 10
> -------
> show mem free
> Head Total(b) Used(b) Free(b) Lowest(b) Largest(b)
> Processor 60950720 23787744 2867992 20919752 6545988 8043712
> I/O 40000000 16777216 1533344 15243872 15216388 15241860
>
> [show mem fail alloc showed nothing]

--
Alfredo Sola
Administrador del sistema



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