Hello, list, I use 4 disk nodes (2TB RAID5 in each) with nbd. The question is how can i configure the system, to use more cache (or buffers) ? All the nodes have 2GB ram, but never use more than 1.1GB. [root@st-0001 root]# free total used free shared buffers cached Mem: 2072972 913048 1159924 0 838964 24568 -/+ buffers/cache: 49516 2023456 Swap: 0 0 0 [root@st-0001 root]# cat /proc/meminfo MemTotal: 2072972 kB MemFree: 1159052 kB Buffers: 839772 kB Cached: 25052 kB SwapCached: 0 kB Active: 10000 kB Inactive: 857180 kB HighTotal: 1179584 kB HighFree: 1150596 kB LowTotal: 893388 kB LowFree: 8456 kB SwapTotal: 0 kB SwapFree: 0 kB Dirty: 848 kB Writeback: 0 kB Mapped: 4884 kB Slab: 27320 kB CommitLimit: 1036484 kB Committed_AS: 9460 kB PageTables: 248 kB VmallocTotal: 114680 kB VmallocUsed: 452 kB VmallocChunk: 113484 kB [root@st-0001 root]# The readahead and the performance is very important for me. I have allready try to tune the vm, but the used cache/buffer is still unchanged. If somebody have an idea, please let me know! :-) Thanks, Janos - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html