Q: "deferring operation: too many executing" / "deferring operation: pending operations"

["Ulrich Windl" <Ulrich.Windl@rz.uni-regensburg.de>]

Hi!

I have a question for the following log messages:
slapd[2215]: connection_input: conn=144871 deferring operation: too many executing
slapd[2215]: connection_input: conn=144871 deferring operation: pending operations
slapd[2215]: connection_input: conn=144871 deferring operation: pending operations

What is "too many", i.e. where is that limit configured?
Is it possible to tell how many "pending operations" there are?

Finally: It seems slapd "drives against the wall hard", meaning it runs at full speed until the limit is reached, the refuses any more connection/operation. Is it possible to activate (configure) a "soft knee" behavior, where after reaching a specified limit of connections or operations rate slapd starts responding increasingly slower? That would help load balancers to select a different server in time...

Regards,
Ulrich