> You don't have anybody messing with /proc/sys/vm/drop_caches, do you? Highly unlikely given that (1) evictions, while often very significant, are usually not *complete* (although the first graph example I provided had a more or less complete eviction) and (2) the evictions are not obviously periodic indicating some kind of cron job, and (3) we see the evictions happening across a wide variety of machines. So yes, I feel confident that we are not accidentally doing that. (FWIW though, drop_caches is great. I only recently found out about it, and it's really useful when benchmarking.) -- / Peter Schuller aka scode -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>