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seaweedfs/note/memory_usage.txt
Stuart P. Bentley 1a194a578c More consistency with SeaweedFS name 
Among the changes, this replaces a couple instances of "Seaweed File System"
with "SeaweedFS", for the same reason that nobody says "Mongo Data Base".
2015-04-16 21:11:25 +00:00

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64 32G volumes consumes 10G memory
Each volume has 25M index, so each cost 160MB memory
Things happened when I use lots of threads ( almost 120 ) keeping read file from SeaweedFS.
But I'm not so familiar with linux so I can't tell you exactly what happened.
Next I'll show you things I know , if you need more info , contact me
My SeaweedFS version is about 0.12
1. top
top - 12:07:37 up 1 day, 3:17, 2 users, load average: 0.00, 0.00, 0.00
Tasks: 152 total, 1 running, 151 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0%us, 0.0%sy, 0.0%ni, 99.8%id, 0.1%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 16269880k total, 16192364k used, 77516k free, 58172k buffers
Swap: 2064376k total, 12324k used, 2052052k free, 2827520k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1499 root 20 0 11.6g 10g 1424 S 0.0 65.6 7:32.53 weedvolume
1498 root 20 0 3204m 2.1g 1428 S 0.0 13.5 4:36.59 weedvolume
1737 root 20 0 98868 4932 2920 S 0.0 0.0 0:00.56 sshd
1497 root 20 0 151m 4404 1152 S 0.0 0.0 1:21.40 weedmaster
1335 root 20 0 97816 3044 2896 S 0.0 0.0 0:00.76 sshd
After system became steady , weedvolume used 65.6% memory .
2. free -m
total used free shared buffers cached
Mem: 15888 15809 79 0 56 2758
-/+ buffers/cache: 12994 2894
Swap: 2015 12 2003
3. startup cmd
screen -d -m /opt/weed/weedmaster -mdir /data/weeddata/ > /data/logs/weed/master.log &
screen -d -m /opt/weed/weedvolume -volumes=0-64 -dir /data/weeddata/ -pulseSeconds=20 -publicUrl="x.y.z:9334" -port 9334 > /data/logs/weed/s01.log &
screen -d -m /opt/weed/weedvolume -volumes=65-107 -dir /data/weeddata/ -pulseSeconds=20 -publicUrl="x.y.z:9335" -port 9335 > /data/logs/weed/s02.log &
4. du -sh .
32G 0.dat
26M 0.idx
8.2G 100.dat
6.8M 100.idx
8.2G 101.dat
6.9M 101.idx
8.2G 102.dat
6.8M 102.idx
8.2G 103.dat
6.8M 103.idx
8.2G 104.dat
6.8M 104.idx
8.2G 105.dat
6.9M 105.idx
8.2G 106.dat
6.9M 106.idx
8.2G 107.dat
6.9M 107.idx
32G 10.dat
25M 10.idx
32G 11.dat
25M 11.idx
32G 12.dat
25M 12.idx
32G 13.dat
25M 13.idx
32G 14.dat
25M 14.idx
32G 15.dat
25M 15.idx
32G 16.dat
25M 16.idx
32G 17.dat
25M 17.idx
32G 18.dat
25M 18.idx
32G 19.dat
25M 19.idx
32G 1.dat
26M 1.idx
32G 20.dat
25M 20.idx
32G 21.dat
25M 21.idx
32G 22.dat
25M 22.idx
32G 23.dat
25M 23.idx
32G 24.dat
25M 24.idx
32G 25.dat
25M 25.idx
32G 26.dat
25M 26.idx
32G 27.dat
25M 27.idx
32G 28.dat
25M 28.idx
32G 29.dat
25M 29.idx
32G 2.dat
26M 2.idx
32G 30.dat
25M 30.idx
32G 31.dat
25M 31.idx
32G 32.dat
25M 32.idx
32G 33.dat
25M 33.idx
32G 34.dat
25M 34.idx
32G 35.dat
25M 35.idx
32G 36.dat
25M 36.idx
32G 37.dat
25M 37.idx
32G 38.dat
25M 38.idx
32G 39.dat
25M 39.idx
32G 3.dat
26M 3.idx
32G 40.dat
25M 40.idx
32G 41.dat
25M 41.idx
32G 42.dat
25M 42.idx
32G 43.dat
25M 43.idx
32G 44.dat
25M 44.idx
32G 45.dat
25M 45.idx
32G 46.dat
25M 46.idx
32G 47.dat
25M 47.idx
32G 48.dat
25M 48.idx
32G 49.dat
25M 49.idx
32G 4.dat
26M 4.idx
32G 50.dat
25M 50.idx
32G 51.dat
25M 51.idx
32G 52.dat
25M 52.idx
32G 53.dat
25M 53.idx
32G 54.dat
25M 54.idx
32G 55.dat
25M 55.idx
32G 56.dat
25M 56.idx
32G 57.dat
25M 57.idx
32G 58.dat
25M 58.idx
32G 59.dat
25M 59.idx
32G 5.dat
26M 5.idx
32G 60.dat
25M 60.idx
32G 61.dat
25M 61.idx
32G 62.dat
25M 62.idx
32G 63.dat
25M 63.idx
32G 64.dat
25M 64.idx
8.2G 65.dat
6.9M 65.idx
8.2G 66.dat
6.9M 66.idx
8.2G 67.dat
6.9M 67.idx
8.2G 68.dat
6.8M 68.idx
8.2G 69.dat
6.9M 69.idx
32G 6.dat
25M 6.idx
8.2G 70.dat
6.8M 70.idx
8.2G 71.dat
6.9M 71.idx
8.2G 72.dat
6.9M 72.idx
8.2G 73.dat
6.9M 73.idx
8.2G 74.dat
6.9M 74.idx
8.2G 75.dat
6.9M 75.idx
8.1G 76.dat
6.8M 76.idx
8.2G 77.dat
6.8M 77.idx
8.2G 78.dat
6.8M 78.idx
8.1G 79.dat
6.8M 79.idx
32G 7.dat
25M 7.idx
8.2G 80.dat
6.8M 80.idx
8.2G 81.dat
6.9M 81.idx
8.2G 82.dat
6.9M 82.idx
8.2G 83.dat
6.9M 83.idx
8.2G 84.dat
6.9M 84.idx
8.2G 85.dat
6.8M 85.idx
8.2G 86.dat
6.9M 86.idx
8.2G 87.dat
6.9M 87.idx
8.2G 88.dat
6.9M 88.idx
8.2G 89.dat
6.8M 89.idx
32G 8.dat
25M 8.idx
8.2G 90.dat
6.9M 90.idx
8.1G 91.dat
6.8M 91.idx
8.1G 92.dat
6.8M 92.idx
8.1G 93.dat
6.8M 93.idx
8.2G 94.dat
6.9M 94.idx
8.2G 95.dat
6.9M 95.idx
8.2G 96.dat
6.9M 96.idx
8.2G 97.dat
6.9M 97.idx
8.2G 98.dat
6.9M 98.idx
8.2G 99.dat
6.9M 99.idx
32G 9.dat
25M 9.idx
4.0K directory.seq
You can see the volume 1-64 is now full.
5. more log
see logs.zip
In messages you can see these lines: (Line 51095)
Sep 26 06:14:31 wedb-01 kernel: auditd: page allocation failure. order:0, mode:0x20
Sep 26 06:14:31 wedb-01 kernel: Pid: 1009, comm: auditd Not tainted 2.6.32-220.el6.x86_64 #1
Sep 26 06:14:31 wedb-01 kernel: Call Trace:
After those lines , the system deny any new network connect request
6. /dir/status
{"Machines":[{"Server":{"Url":"127.0.0.1:9335","PublicUrl":"x.y.z:9335"},"Volumes":[{"Id":106,"Size":8728909632},{"Id":66,"Size":8729852744},{"Id":90,"Size":8747834896},{"Id":103,"Size":8718106024},{"Id":87,"Size":8732133512},{"Id":96,"Size":8737251904},{"Id":80,"Size":8704130712},{"Id":77,"Size":8717989496},{"Id":70,"Size":8731474744},{"Id":94,"Size":8758656144},{"Id":107,"Size":8729599232},{"Id":67,"Size":8736848088},{"Id":91,"Size":8665847760},{"Id":100,"Size":8703272552},{"Id":84,"Size":8745121528},{"Id":97,"Size":8713031744},{"Id":81,"Size":8726088872},{"Id":74,"Size":8738588152},{"Id":71,"Size":8729349920},{"Id":95,"Size":8741526896},{"Id":104,"Size":8699374736},{"Id":88,"Size":8740362880},{"Id":101,"Size":8711832992},{"Id":85,"Size":8723479552},{"Id":78,"Size":8700345400},{"Id":75,"Size":8727796912},{"Id":68,"Size":8698607440},{"Id":92,"Size":8682683056},{"Id":105,"Size":8741226152},{"Id":65,"Size":8725365752},{"Id":89,"Size":8703062600},{"Id":98,"Size":8742331560},{"Id":82,"Size":8762554952},{"Id":79,"Size":8696300376},{"Id":72,"Size":8708217304},{"Id":69,"Size":8740268144},{"Id":93,"Size":8685060320},{"Id":102,"Size":8708695352},{"Id":86,"Size":8783247776},{"Id":99,"Size":8753463608},{"Id":83,"Size":8725963952},{"Id":76,"Size":8694693536},{"Id":73,"Size":8733560832}]},{"Server":{"Url":"127.0.0.1:9334","PublicUrl":"x.y.z:9334"},"Volumes":[{"Id":34,"Size":33415706800},{"Id":58,"Size":33569224784},{"Id":18,"Size":33474649968},{"Id":55,"Size":33542422680},{"Id":15,"Size":33517247576},{"Id":48,"Size":33574860328},{"Id":8,"Size":33511257144},{"Id":45,"Size":33463948408},{"Id":5,"Size":34317702920},{"Id":29,"Size":33465695776},{"Id":38,"Size":33553119624},{"Id":62,"Size":33448316736},{"Id":22,"Size":33566586296},{"Id":35,"Size":33493733728},{"Id":59,"Size":33498554904},{"Id":19,"Size":33493313784},{"Id":52,"Size":33552978448},{"Id":12,"Size":33505183752},{"Id":49,"Size":33603029896},{"Id":9,"Size":33515778064},{"Id":42,"Size":33500402248},{"Id":2,"Size":34223232992},{"Id":26,"Size":33526519600},{"Id":39,"Size":33580414336},{"Id":63,"Size":33476332456},{"Id":23,"Size":33543872592},{"Id":32,"Size":33515290168},{"Id":56,"Size":33499171184},{"Id":16,"Size":33556591168},{"Id":64,"Size":33495148616},{"Id":53,"Size":33467738560},{"Id":13,"Size":33596873960},{"Id":46,"Size":33508120448},{"Id":6,"Size":33417470256},{"Id":30,"Size":33532933992},{"Id":43,"Size":33591802008},{"Id":3,"Size":34270682080},{"Id":27,"Size":33525736944},{"Id":36,"Size":33443597824},{"Id":60,"Size":33427931336},{"Id":20,"Size":33499083096},{"Id":33,"Size":33531396280},{"Id":57,"Size":33578015104},{"Id":17,"Size":33510525480},{"Id":50,"Size":33503123704},{"Id":10,"Size":33502391608},{"Id":47,"Size":33521868568},{"Id":7,"Size":33497101664},{"Id":31,"Size":33426905232},{"Id":40,"Size":33472978696},{"Id":0,"Size":34337344304},{"Id":24,"Size":33550157192},{"Id":37,"Size":33477162720},{"Id":61,"Size":33537175080},{"Id":21,"Size":33517192456},{"Id":54,"Size":33480720288},{"Id":14,"Size":33513192896},{"Id":51,"Size":33531336080},{"Id":11,"Size":33562385088},{"Id":44,"Size":33554479104},{"Id":4,"Size":34333127520},{"Id":28,"Size":33510503000},{"Id":41,"Size":33574922928},{"Id":1,"Size":34307181368},{"Id":25,"Size":33542834568}]}],"Writers":[106,66,90,103,87,96,80,77,70,94,107,67,91,100,84,97,81,74,71,95,104,88,101,85,78,75,68,92,105,65,89,98,82,79,72,69,93,102,86,99,83,76,73,34,58,18,55,15,48,8,45,5,29,38,62,22,35,59,19,52,12,49,9,42,2,26,39,63,23,32,56,16,64,53,13,46,6,30,43,3,27,36,60,20,33,57,17,50,10,47,7,31,40,0,24,37,61,21,54,14,51,11,44,4,28,41,1,25],"FileIdSequence":110250000}
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