Created by: bushidonggua

如题，每次跑到20左右pass的时候就因为内存不足被kill掉，pass0 pass2之类的占用还是5%左右，到了pass7就到了30%了，越到后面，内存占用不停地变多

         total       used       free     shared    buffers     cached

Mem: 24519888 24356632 163256 0 49744 15330580 -/+ buffers/cache: 8976308 15543580 Swap: 0 0 0