memcached timeout

[Dani]

hey, I'm getting flooded with "Can't connect to localhost:11211, Connection timed out."

I've talked to some memcached 'people' and they ask about maxclients limit and so on, and since apache!=litespeed I'm wondering if it's the

PHP_LSAPI_MAX_REQUESTS=600
PHP_LSAPI_CHILDREN=150

they are talking about? And if so which should I raise to get PHP not to loose connections with memcached, and also not get 503 errors

I'm using memcached for php sessions + some stuff on the page, with around 3k online users.

thanks