memory usage of Riak.

Alex Feng sweden.feng at gmail.com
Thu Jan 26 13:29:37 EST 2017


HI Mattew,

Thank you for the help.
I got answer from Shaun already, seems LevelDB and Bitcask, they are same,
memory usage does not show up in Erlang.

Br,
Alex

2017-01-26 14:47 GMT+01:00 Matthew Von-Maszewski <matthewv at basho.com>:

> Alex,
>
> Which backend are you using?  Leveldb's memory usage does not show up
> within Erlang.  Maybe that is what you are experiencing?
>
> Matthew
>
> Sent from my iPad
>
> > On Jan 26, 2017, at 5:47 AM, Alex Feng <sweden.feng at gmail.com> wrote:
> >
> > Hi Riak Users,
> >
> > One of my riak nodes, it has 4G memory, when I check the memory usage
> with "free -m", I can see there are only around 150M left.  Then I check
> the command "riak-admin status", it shows around 415M(415594432) consumed
> by Erlang.  But with "top" command, it shows Erlang takes 52.1% memory, it
> is about 2G.
> > So, my question is where is the other ~1.6G (2G - 415M) memory ?
> >
> >
> > dropped_vnode_requests_total : 0
> > executing_mappers : 0
> > gossip_received : 6
> > handoff_timeouts : 0
> > ignored_gossip_total : 0
> > index_fsm_active : 0
> > index_fsm_create : 0
> > index_fsm_create_error : 0
> > late_put_fsm_coordinator_ack : 0
> > leveldb_read_block_error : 0
> > list_fsm_active : 0
> > list_fsm_create : 0
> > list_fsm_create_error : 0
> > list_fsm_create_error_total : 0
> > list_fsm_create_total : 0
> > map_actor_counts_100 : 0
> > map_actor_counts_95 : 0
> > map_actor_counts_99 : 0
> > map_actor_counts_mean : 0
> > map_actor_counts_median : 0
> > mem_allocated : 3859660800
> > mem_total : 3975495680
> > memory_atom : 703377
> > memory_atom_used : 677686
> > memory_binary : 92813136
> > memory_code : 16511098
> > memory_ets : 6823184
> > memory_processes : 287157280
> > memory_processes_used : 287149824
> > memory_system : 128437152
> > memory_total : 415594432
> >
> >
> >
> > KiB Swap:  4063228 total,   106496 used,  3956732 free.   296560 cached
> Mem
> >
> >   PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+
> COMMAND
> >     1 riak      20   0 4844692 1.929g   1772 S   5.3 52.1   4539:13
> beam.smp
> > 23510 riak      20   0 10.152g 1.131g  32292 S   4.3 30.6   2:07.28 java
> >    72 riak      20   0    7492     92      0 S   0.0  0.0   0:15.22 epmd
> >   190 riak      20   0    4440    224    172 S   0.0  0.0   0:00.67 sh
> >   191 riak      20   0    4324    252    192 S   0.0  0.0   0:08.97
> memsup
> >   193 riak      20   0    4324      0      0 S   0.0  0.0   0:00.00
> cpu_sup
> >   285 riak      20   0    7460     28      0 S   0.0  0.0   0:29.51
> inet_gethost
> >   286 riak      20   0   13780    316    236 S   0.0  0.0   0:55.30
> inet_gethost
> >   287 riak      20   0   13780      8      0 S   0.0  0.0   0:00.00
> inet_gethost
> > 22534 root      20   0   22320   1248    756 S   0.0  0.0   0:00.07 bash
> > 24714 root      20   0   23992   1456   1052 R   0.0  0.0   0:00.00 top
> >
> >
> > Br,
> > Alex
> > _______________________________________________
> > riak-users mailing list
> > riak-users at lists.basho.com
> > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
>
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