I'm using 3.23.32 + FreeBSD 4.2 /w Lastest Snapshots on a Dual P2 Xeon 400MHz 1MB Cache, 1GB Ram on 3ware IDE RAID The traffic of it is about 300 queries/second on average, and keep staying at around 400 q/s at night. The problem is that, it core dumps in 5-10 mins, especially at night (high traffic?) I've tried to enable/disable SMP, modify the memory setting in my.cnf, concerrency thread setting etc. And apply the lastest snapshots and make world. Binary, compile by myself with and without -O cflags, all these give the same result -> core dumps every 5-10 mins... It's core dumps due to bus error (that's what it report...), not segmentation fault. I've also tried to change the RAM, mother board and harddisk, but still...