free_chunks_end is just a counter for how many chunks are available in a recently allocated slab page. So if a slab class grabs 1MB of new memory, it'll have something in free_chunks_end temporarily, then it all moves into free_chunks or otherwise gets used.
In 1.4.15 this counter is gone completely as we pre-split chunks directly into the freelist. If it says free_chunks then you have free space. it's not full. On Wed, 19 Sep 2012, mmsilveira wrote: > Hi, > > I'm running memcached-1.4.14 in CentOS 6 x86_64 system, and my clients write > small objects in memcached. I'm staring memcached with this directives: > > memcached -d -p 11211 -u memcache -m 18432 -c 12288 -P > /var/run/memcached/memcached.pid -t 64 > > The memory has enough space, the slabs are not full and there are free > chunks. But, using memcached-tool, it returns full slab: > > # Item_Size Max_age Pages Count Full? Evicted Evict_Time OOM > 1 96B 3596s 2 14928 yes 0 0 0 > 2 120B 3601s 1 5042 yes 0 0 0 > 5 240B 118s 1 3 yes 0 0 0 > > It's possible verify the follow stats of my slabs: > > STAT 1:chunk_size 96 > STAT 1:chunks_per_page 10922 > STAT 1:total_pages 2 > STAT 1:total_chunks 21844 > STAT 1:used_chunks 14919 > STAT 1:free_chunks 6925 > STAT 1:free_chunks_end 0 > STAT 1:mem_requested 1235946 > STAT 1:get_hits 0 > STAT 1:cmd_set 1 > STAT 1:delete_hits 0 > STAT 1:incr_hits 199280204 > STAT 1:decr_hits 0 > STAT 1:cas_hits 0 > STAT 1:cas_badval 0 > STAT 1:touch_hits 0 > STAT 2:chunk_size 120 > STAT 2:chunks_per_page 8738 > STAT 2:total_pages 1 > STAT 2:total_chunks 8738 > STAT 2:used_chunks 5038 > STAT 2:free_chunks 3700 > STAT 2:free_chunks_end 0 > STAT 2:mem_requested 524720 > STAT 2:get_hits 0 > STAT 2:cmd_set 0 > STAT 2:delete_hits 0 > STAT 2:incr_hits 1638482 > STAT 2:decr_hits 0 > STAT 2:cas_hits 0 > STAT 2:cas_badval 0 > STAT 2:touch_hits 0 > STAT 5:chunk_size 240 > STAT 5:chunks_per_page 4369 > STAT 5:total_pages 1 > STAT 5:total_chunks 4369 > STAT 5:used_chunks 3 > STAT 5:free_chunks 4366 > STAT 5:free_chunks_end 0 > STAT 5:mem_requested 672 > STAT 5:get_hits 3 > STAT 5:cmd_set 11 > STAT 5:delete_hits 1 > STAT 5:incr_hits 0 > STAT 5:decr_hits 0 > STAT 5:cas_hits 0 > STAT 5:cas_badval 0 > STAT 5:touch_hits 0 > STAT active_slabs 3 > > Why free_chunks_end is always returning "0"? Is there any error in my > configuration or any allocation feature that solves this? > > Thank you, > > Mauricio > >
