I was interested in what this was doing, but didn't find the link working.

I did find it at:

https://www.mail-archive.com/[email protected]/msg14241.html

Ben


On Thu, Feb 27, 2014 at 2:10 PM, Nils Goroll <[email protected]> wrote:

> Apologies for this being off-topic in the strict sense, but this
> mailinglist
> probably has a relatively high proportion of people sharing my fate and
> having
> to manage o****e systems:
>
> It is now 7 months that Robert has marked
> https://www.illumos.org/issues/3925
> as fixed (THANK YOU, Robert!) but the issue still exists in current s11
> (afaik
> their bug is 7143346) - and my old workaround does not work any more.
>
> I would like to share the result of two hours work to hopefully safe a
> similar
> amount for someone else. It also contains a brief explanation.
>
> #!/bin/bash
>
> ## reclaim memory from kmem caches
> ## workaround for issue documented here
> ##
> ##
>
> http://mail.opensolaris.org/pipermail/networking-discuss/2012-February/014357.html
> ##
> ## update 20140227 [email protected]:
> ## somewhen between 151.0.1.12 and 11.1 oracle has changed the code calling
> ## kmem_cache_reap such that it will not get called any more if only
> freemem
> ## is lower than lotsfree. I don't know what the best way is to do achieve
> ## ip_dce_reclaim getting called, but there is a new condition in
> ip_dce_reclaim_stack
> ## to only do the full cleanup if lotsfree + needfree > freemem, and
> ## setting needfree > freemen - lotsfree does the job
> ##
> ## because freemem may change at any time, we add a little 0x20 extra
> ## to our needfree.
>
> ndd -set /dev/ip ip_dce_reclaim_fraction 1
> {
> echo '%/l/needfree >oldneedfree'
> echo 'needfree/Z ((%/l/freemem)-(%/l/lotsfree)+20)'
> sleep 2
> echo 'needfree/Z <oldneedfree'
> } | exec mdb -kw
>
>
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