a few weeks ago I had some proxy memory allocation error (500).

I've searched after that and found two docs. The 10018669 and 10018661.

I set up some parameters

max/min packet recivie buffers,
max interrupt events
I increased the number of directories to 96 (earlier it was 64 for the
faster starting)

since that, I had no problems, but today I've got the error message again.

what can be the reason?
I read in the docs that, can be caused by periods of high traffic but I
think there weren't any event to cause high traffic.

any ideas?