Hey, I don't know what you're doing but I can say there's nothing buffering prints. Maybe you're starting memcached as a daemon? Prints won't work in that case.
On Thu, 29 Apr 2021, Qingchen Dang wrote: > Thank you for helping! Yes I actually figured it out that I used wrong > parameters to load data which causes the overwrite. > > But I do have one more question, how to add print statements to memcached > source code? When I use ‘make test’, printf works as usual. But in the actual > run, it seems the print is re-bufferred to somewhere else which makes it very > hard to debug. Is there a way to print to stdout? > > Thank you very much! > QD > > Sent from my iPhone > > > On Apr 28, 2021, at 10:33 PM, dormando <dorma...@rydia.net> wrote: > > > > How're you loading the data? > > > > From the stats it looks like you're probably overwriting the same values > > over and over (high total_items but low curr_items and no get_expired) > > > >> On Wed, 28 Apr 2021, Qingchen Dang wrote: > >> > >> Hi, > >> I am trying to test my optimization of Memcached eviction, but it seems > >> even though I got a lot of misses, the evictions stats is always 0. > >> Here is the stats for the original Memcached without any change. I wonder > >> what memcached config/benchmark config can make eviction happen? > >> > >> STAT pointer_size 64 > >> > >> STAT rusage_user 110.668826 > >> > >> STAT rusage_system 769.767632 > >> > >> STAT max_connections 1024 > >> > >> STAT curr_connections 2 > >> > >> STAT total_connections 8004 > >> > >> STAT rejected_connections 0 > >> > >> STAT connection_structures 402 > >> > >> STAT response_obj_oom 0 > >> > >> STAT response_obj_count 1 > >> > >> STAT response_obj_bytes 131072 > >> > >> STAT read_buf_count 16 > >> > >> STAT read_buf_bytes 262144 > >> > >> STAT read_buf_bytes_free 114688 > >> > >> STAT read_buf_oom 0 > >> > >> STAT reserved_fds 40 > >> > >> STAT cmd_get 72720000 > >> > >> STAT cmd_set 7280000 > >> > >> STAT cmd_flush 0 > >> > >> STAT get_hits 626512 > >> > >> STAT get_misses 72093488 > >> > >> STAT get_expired 0 > >> > >> STAT get_flushed 0 > >> > >> STAT delete_misses 0 > >> > >> STAT delete_hits 0 > >> > >> STAT incr_misses 0 > >> > >> STAT incr_hits 0 > >> > >> STAT decr_misses 0 > >> > >> STAT decr_hits 0 > >> > >> STAT bytes_read 1809568092 > >> > >> STAT bytes_written 459401348 > >> > >> STAT limit_maxbytes 2097152 > >> > >> STAT accepting_conns 1 > >> > >> STAT listen_disabled_num 0 > >> > >> STAT time_in_listen_disabled_us 0 > >> > >> STAT threads 8 > >> > >> STAT conn_yields 0 > >> > >> STAT hash_power_level 16 > >> > >> STAT hash_bytes 524288 > >> > >> STAT hash_is_expanding 0 > >> > >> STAT slab_reassign_rescues 0 > >> > >> STAT slab_reassign_chunk_rescues 0 > >> > >> STAT slab_reassign_evictions_nomem 0 > >> > >> STAT slab_reassign_inline_reclaim 0 > >> > >> STAT slab_reassign_busy_items 0 > >> > >> STAT slab_reassign_busy_deletes 0 > >> > >> STAT slab_reassign_running 0 > >> > >> STAT slabs_moved 0 > >> > >> STAT lru_crawler_running 0 > >> > >> STAT lru_crawler_starts 4 > >> > >> STAT lru_maintainer_juggles 101778 > >> > >> STAT malloc_fails 0 > >> > >> STAT bytes 94437 > >> > >> STAT curr_items 909 > >> > >> STAT total_items 7280000 > >> > >> STAT slab_global_page_pool 0 > >> > >> STAT expired_unfetched 0 > >> > >> STAT evicted_unfetched 0 > >> > >> STAT evicted_active 0 > >> > >> STAT evictions 0 > >> > >> STAT reclaimed 0 > >> > >> STAT crawler_reclaimed 0 > >> > >> STAT crawler_items_checked 2732 > >> > >> STAT lrutail_reflocked 12 > >> > >> STAT moves_to_cold 116840 > >> > >> STAT moves_to_warm 3185 > >> > >> STAT moves_within_lru 538 > >> > >> STAT direct_reclaims 0 > >> > >> STAT lru_bumps_dropped 0 > >> > >> > >> Thanks! > >> > >> QD > >> > >> -- > >> > >> --- > >> You received this message because you are subscribed to the Google Groups > >> "memcached" group. > >> To unsubscribe from this group and stop receiving emails from it, send an > >> email to memcached+unsubscr...@googlegroups.com. > >> To view this discussion on the web visit > >> https://groups.google.com/d/msgid/memcached/95e1a261-7ad5-49c2-a917-0635b7e3cbbfn%40googlegroups.com. > >> > >> > > > > -- > > > > --- > > You received this message because you are subscribed to a topic in the > > Google Groups "memcached" group. > > To unsubscribe from this topic, visit > > https://groups.google.com/d/topic/memcached/cIh-fFlEEh8/unsubscribe. > > To unsubscribe from this group and all its topics, send an email to > > memcached+unsubscr...@googlegroups.com. > > To view this discussion on the web visit > > https://groups.google.com/d/msgid/memcached/e274ce6a-63ab-2896-d7c0-befa57222a%40rydia.net. > > -- > > --- > You received this message because you are subscribed to the Google Groups > "memcached" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to memcached+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/memcached/55A7989D-20BC-4830-8719-83D75CFA9194%40princeton.edu. > -- --- You received this message because you are subscribed to the Google Groups "memcached" group. 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