[sldev] Script/Parcel/Memory Limits - Memory Limit Configuration

[Lear Cale]

>
> I fully agree with Kelly here.
>
I agree also, if I understand correctly.

Today, there's a rather high limit that, if exceeded, causes severe
thrashing.  Most servers are below that limit, and not thrashing.  If the
new limits cut in well before that thrashing limit, but also well above
typical usage levels, things should be good.

The problem is the swimming pool analogy, which is germane, if limited by
showing only one side of the issue.  However, if the limits are high enough,
the hardest-hit residents will be those with the smallest parcels who are
relying on very low script usage of their neighbors.  Yeah, that'll be a
bummer, but as I see it, any solution to this raises more problems than it
solves.

Another problem is that, given a fixed budget, people will tend to use up
that budget.  To address this, I suggest we have two levels; when going over
the recommended level the parcel tools signal "yellow" but no limiting is in
force.  The higher limit is enforced.  Sure, many will simply ignore the
yellow, but many won't, and it'll be a clear signal about what is considered
safe and healthy.  Those with smaller parcels will be less likely to heed
the color; those with larger ones are far more likely to since their impact
on the whole is greater -- they're more likely to shoot themselves in the
foot, so they'll be more likely to use a trigger guard.  It would send a
useful message.

Argent argues for a bonus for smaller parcels.  We should seriously consider
allocating the difference between reasonable levels and critical levels to
smaller parcels.  This bonus could be calculated assuming all 512 parcels --
dividing the total difference by 65536/512 to calculate a per-parcel bonus,
applied regardless of parcel size.  It would be insignificant for
full-region parcels, but substantial for 512's.  The bonus might need to be
reduced proportionately for parcels smaller than 512, to avoid catastrophic
overcommitment in regions with lots of tiny parcels.
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