ncache 112 libdb/bt_open.c pgno_t ncache; ncache 305 libdb/bt_open.c ncache = (b.cachesize + t->bt_psize - 1) / t->bt_psize; ncache 326 libdb/bt_open.c mpool_open(NULL, t->bt_fd, t->bt_psize, ncache)) == NULL)