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Posted to user@cassandra.apache.org by Osman YOZGATLIOGLU <os...@krontech.com> on 2017/04/12 12:09:37 UTC
Re: [Marketing Mail] Re: [Marketing Mail] Re: nodetool status high
load info
Actually there is no delete right now. Only inserts.
I use twcs and not much compaction occurs.
It just miscalculates sstable sizes.
On 12-04-2017 14:58, anuja jain wrote:
Do you perform a lot of deletes or updates on your database?
On restart, it performs major compaction which can reduce the load on your node by removing stale data.
Try configuring compaction in you conf to perform minor compaction i.e. compactions at a regular interval.
Thanks,
Anuja
On Wed, Apr 12, 2017 at 3:02 PM, Osman YOZGATLIOGLU <os...@krontech.com>> wrote:
Hello,
Here is the problem loads, first node shows 206TB data. After cassandra restart it shows 51TB, like df shows.
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
-- Address Load Tokens Owns (effective) Host ID Rack
UN x.x.x.1 206 TB 256 50.6% xx rack1
UN x.x.x.2 190.77 TB 256 49.9% yy rack1
..
-- Address Load Tokens Owns (effective) Host ID Rack
UN x.x.x.1 51.01 TB 256 50.6% xx rack1
UN x.x.x.2 49.84 TB 256 49.9% yy rack1
..
nodetool tpstats;
Pool Name Active Pending Completed Blocked All time blocked
MutationStage 2 1 75536494778 0 0
ViewMutationStage 0 0 0 0 0
ReadStage 0 0 41402 0 0
RequestResponseStage 0 0 35515109625 0 0
ReadRepairStage 0 0 3 0 0
CounterMutationStage 0 0 0 0 0
MiscStage 0 0 0 0 0
CompactionExecutor 5 5 732161 0 0
MemtableReclaimMemory 0 0 198602 0 0
PendingRangeCalculator 0 0 11 0 0
GossipStage 0 0 3854373 0 0
SecondaryIndexManagement 0 0 0 0 0
HintsDispatcher 1 7 6 0 0
MigrationStage 0 0 6 0 0
MemtablePostFlush 0 0 200265 0 0
ValidationExecutor 0 0 0 0 0
Sampler 0 0 0 0 0
MemtableFlushWriter 0 0 198602 0 0
InternalResponseStage 0 0 5209219 0 0
AntiEntropyStage 0 0 0 0 0
CacheCleanupExecutor 0 0 0 0 0
Native-Transport-Requests 0 0 15910719923 0 192131887
Message type Dropped
READ 0
RANGE_SLICE 0
_TRACE 0
HINT 0
MUTATION 1000085
COUNTER_MUTATION 0
BATCH_STORE 0
BATCH_REMOVE 0
REQUEST_RESPONSE 0
PAGED_RANGE 0
READ_REPAIR 0
sar values;
05:10:01 CPU %user %nice %system %iowait %steal %idle
05:20:01 all 26.96 16.09 3.73 2.23 0.00 50.99
05:30:02 all 26.99 16.83 3.82 2.86 0.00 49.50
05:40:01 all 27.17 18.19 3.83 0.89 0.00 49.91
05:50:01 all 27.16 18.74 3.80 0.28 0.00 50.02
06:00:01 all 26.30 19.88 3.88 0.29 0.00 49.64
06:10:01 all 28.02 21.11 3.91 0.28 0.00 46.68
06:20:01 all 28.37 19.64 3.98 0.40 0.00 47.61
06:30:01 all 29.56 19.51 4.08 0.45 0.00 46.40
06:40:01 all 29.28 20.56 4.08 0.34 0.00 45.74
06:50:01 all 29.46 19.15 3.99 0.19 0.00 47.20
07:00:01 all 29.45 21.09 4.07 0.26 0.00 45.13
07:10:01 all 29.23 21.59 4.18 0.29 0.00 44.71
07:20:01 all 30.78 21.24 4.09 0.48 0.00 43.40
07:30:01 all 29.06 21.63 4.09 0.27 0.00 44.94
07:40:01 all 28.84 21.85 4.13 1.76 0.00 43.41
07:50:01 all 29.22 21.35 4.14 2.53 0.00 42.76
08:00:01 all 30.10 21.66 4.24 2.39 0.00 41.60
08:10:01 all 28.63 21.69 4.22 2.57 0.00 42.88
08:20:01 all 28.63 20.78 4.08 2.61 0.00 43.91
08:30:01 all 30.46 20.08 3.83 2.58 0.00 43.05
08:40:01 all 27.71 21.31 4.06 2.60 0.00 44.33
08:50:01 all 28.87 21.49 4.15 2.58 0.00 42.91
09:00:01 all 29.61 21.38 3.86 2.51 0.00 42.64
09:10:01 all 28.85 21.74 4.16 2.46 0.00 42.79
09:20:01 all 30.15 20.79 4.31 2.44 0.00 42.31
Average: all 22.78 15.21 3.34 0.79 0.00 57.88
Regards,
Osman
On 12-04-2017 11:53, Bhuvan Rawal wrote:
Try nodetool tpstats - it can lead you to where your threads are stuck.
There could be various reasons for load factor to go high like disk/cpu getting choked, you'll probably need to check dstat & iostat output along with Cassandra Threadpool stats to get a decent idea.
On Wed, Apr 12, 2017 at 1:48 PM, Osman YOZGATLIOGLU <os...@krontech.com>>> wrote:
Hello,
Nodetool status shows much more than actual data size.
When I restart node, it shows normal a while and increase load in time.
Where should I look?
Cassandra 3.0.8, jdk 1.8.121
Regards,
Osman
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