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From "Peter Kovgan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-10937) OOM on multiple nodes during test of insert load
Date Thu, 24 Dec 2015 07:33:49 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-10937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15070702#comment-15070702
] 

Peter Kovgan commented on CASSANDRA-10937:
------------------------------------------

Important:
Found on one node 224Gb of hints.
And this hints directory is on small disk.
The disk is full.
May be this is the problem.

> OOM on multiple nodes during test of insert load
> ------------------------------------------------
>
>                 Key: CASSANDRA-10937
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10937
>             Project: Cassandra
>          Issue Type: Bug
>         Environment: Cassandra : 3.0.0
> Installed as open archive, no connection to any OS specific installer.
> Java:
> Java(TM) SE Runtime Environment (build 1.8.0_65-b17)
> OS :
> Linux version 2.6.32-431.el6.x86_64 (mockbuild@x86-023.build.eng.bos.redhat.com) (gcc
version 4.4.7 20120313 (Red Hat 4.4.7-4) (GCC) ) #1 SMP Sun Nov 10 22:19:54 EST 2013
> We have:
> 8 guests ( Linux OS as above) on 2 VMWare managed physical IBM M6 hosts. Each physical
host keeps 4 guests.
> Each guest assigned to have:
> 1 disk 300 Gb for seq. log (NOT SSD)
> 1 disk 4T for data (NOT SSD)
> 11 CPU cores
> Disks are local, not shared.
> Memory on each host -  24 Gb total.
> 8 Gb - cassandra heap
> (lshw and cpuinfo attached in file)
>            Reporter: Peter Kovgan
>         Attachments: more-logs.rar, test2.rar
>
>
> 8 cassandra nodes.
> Load test started with 4 clients(different and not equal machines), each running 1000
threads.
> Each thread assigned in round-robin way to run one of 4 different inserts. 
> Consistency->ONE.
> I attach the full CQL schema of tables and the query of insert.
> Replication factor - 2:
> create keyspace OBLREPOSITORY_NY with replication = {'class':'NetworkTopologyStrategy','NY':2};
> Initiall throughput is:
> 215.000  inserts /sec
> or
> 54Mb/sec, considering single insert size a bit larger than 256byte.
> Data:
> all fields(5-6) are short strings, except one is BLOB of 256 bytes.
> After about a 2-3 hours of work, I was forced to increase timeout from 2000 to 5000ms,
for some requests failed for short timeout.
> Later on(after aprox. 12 hous of work) OOM happens on multiple nodes.
> (all failed nodes logs attached)
> I attach also java load client and instructions how set-up and use it.
> The test is important for our strategic project and we hope it is curable.
> Attachments:
> test2.rar -contains most of material
> more-logs.rar - contains additional nodes logs



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