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 <[email protected]> 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 [email protected]. >> 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 > [email protected]. > 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/memcached/55A7989D-20BC-4830-8719-83D75CFA9194%40princeton.edu.
