[Opensim-dev] Memory cache

[diva at metaverseink.com]

Here's an unexpected outcome of the wobbling last weekend.

Many sims in OSGrid are now experiencing huge performance improvements, 
both in memory consumption and general speed --  much faster teleports, 
script loadings, etc. This got me completely puzzled, because we didn't 
do anything to address that, it came from nowhere.

Well, here's what happened. Sometime last weekend, Melanie changed the 
name of one of the new configuration variables from AssetCaching to 
AssetCache. This happened *after* Nebadon had tested the new 
architecture early that weekend, in which the old name was used. As he 
updated the plazas, he didn't notice the name change. As a result, the 
asset cache module is disabled on his sims, because of the name 
mismatch. And since everyone in OSGrid has been copying the config vars 
from Nebadon's, this has been spreading like a virus :-)

Conclusion: empirical evidence coming from an experiment that no one 
planned shows that our asset cache is a major performance bottleneck!