MEPF concurrent connection faults what does it mean

[p.bylina]

MEPF, concurrent connection faults

[john]

Just wondering the doucmentation is a little unclear (really would love some better docs) but what does this value actually mean? if i see a number such as

237 in this field in the lve stats, what does that mean, that 237 connections were not able to connect because it went beyonf the maximum value? Or did they just get delayed or?

[iseletsk]

it means that 237 connections got 503 response due to the limit.
This is hard limit, and end user would get an error (503)
The reason is that otherwise one site can use up all apache connections (controlled by MaxClients), and bring down the apache web server, even though there are plenty of CPU/IO, etc...