On Tue, 2009-06-02 at 16:29 +0200, Miquel van Smoorenburg wrote: > [repost, with more people in the cc: list] > > We run a cluster of POP and IMAP servers that are used by > hundreds of thousands of different users- we see as much > as 80.000 different users per server on any given day. > > We noticed a high CPU load on these servers, sometimes near > 100% system time being used on all cores. I used oprofile to > find out where the CPU was being burned and it turned out to > be in rpcauth_lookup_credcache(). The credential cache hashtable > is sized way to small for our purposes- it's just 16 slots, > and with 100.000 entries in the generic and unix credential > caches the chainlength goes over 6000. ping ? Mike. -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
