[dtrace-discuss] Struggling with dynvar space: how big should

[Paul van den Bogaard]

seems that all CPUs are used for allocating data in quite a balanced way. Adding the magic "hz" to the cleanrate flag made it possible to do a run of 384 concurrent users.
Trying to do 1280 and the old stuff reappears :-(

When increasing the cleanrate while specifying 16g for the dynvarspace I get the message:

dtrace: dynamic variable size lowered to 8g

increasing the cleanrate even more and this becomes:

dtrace: dynamic variable size lowered to 4g

Is this not counter effective?  Looks to me I need the both. Or is a single CPU not capable of doing so much dynamic space at such a high rate? Any other "gotchas" that could be tried to get rid of those dynamic variable drops?


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