That makes sense however it doesn't explain what I have been seeing :-).
I have a scenario where no matter how much memory I throw in maximum
number of current items always tops of at about 180k. When that happens I
start seeing on average 200 evictions per minute. Also the fill ratio
never goes above e.g. 94%.
Does that make sense :-) ?
Vladimir
On Thu, 3 Sep 2009, dormando wrote:
They haven't been used yet. Keep throwing data in and it should allocate
more pages. The "full" is deceptive... should probably fix that. That just
means there's nothing known to be free on the tail... But set'ing a new
variable may not cause an eviction or allocate more memory due to finding
an expired item on the tail.
If that makes any sense :)
-Dormando
On Thu, 3 Sep 2009, Vladimir wrote:
I am starting up memcached with following options (giving it 1 GB of RAM)
memcached -d -m 1024 -c 1024 -P -f 1.05 -n 3
If I run the memcached-tool command I get
# /usr/local/bin/memcached-tool 127.0.0.1:11211 display
# Item_Size Max_age 1MB_pages Count Full?
6 80 B 90275 s 1 1 no
7 88 B 89898 s 1 8 no
8 96 B 89732 s 1 142 no
9 104 B 88719 s 1 3 no
10 112 B 69930 s 1 63 no
11 120 B 22886 s 1 3328 no
12 128 B 70335 s 1 3 no
13 136 B 86964 s 1 15 no
15 152 B 85043 s 1 10 no
17 168 B 71797 s 1 2 no
18 176 B 87579 s 1 13 no
19 184 B 292 s 1 1913 no
20 200 B 57631 s 4 20967 yes
21 216 B 57653 s 1 4854 yes
22 232 B 308 s 1 274 no
23 248 B 59621 s 8 33824 yes
24 264 B 87823 s 1 9 no
25 280 B 87228 s 1 5 no
26 296 B 86816 s 1 6 no
27 312 B 85862 s 1 5 no
28 328 B 87199 s 1 4 no
29 344 B 86892 s 1 1 no
30 368 B 87367 s 1 6 no
31 392 B 82457 s 1 4 no
32 416 B 88179 s 1 3 no
33 440 B 86969 s 1 3 no
34 464 B 86087 s 1 2 no
35 488 B 87537 s 1 1 no
36 512 B 86104 s 1 4 no
37 544 B 87799 s 1 5 no
38 576 B 66362 s 1 2 no
39 608 B 86138 s 1 3 no
40 640 B 88066 s 1 4 no
Adding up all the 1MB_pages would indicate that 43 1MB pages are used up.
why is then e.g. class 23 full ? Running stats slabs shows 148
active slabs. Any clues why other 1 MB pages are not allocated ?
Thanks,
Vladimir
