[jira] [Created] (CASSANDRA-11383) SASI index build leads to massive OOM

["DOAN DuyHai (JIRA)" <ji...@apache.org>]

DOAN DuyHai created CASSANDRA-11383:
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             Summary: SASI index build leads to massive OOM
                 Key: CASSANDRA-11383
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11383
             Project: Cassandra
          Issue Type: Bug
          Components: CQL
         Environment: C* 3.4
            Reporter: DOAN DuyHai
         Attachments: system.log_sasi_build_oom

13 bare metal machines
- 6 cores CPU (12 HT)
- 64Gb RAM
- 4 SSD in RAID0

 JVM settings:
- G1 GC
- Xms32G, Xmx32G

C* settings:
- concurrent_compactors: 1
- compaction_throughput_mb_per_sec: 256

I created 9 SASI indices
 - 8 indices with text field, NonTokenizingAnalyser,  PREFIX mode, case-insensitive
 - 1 index with numeric field, SPARSE mode

 After a while, the nodes just gone OOM.

 I attach log files. You can see a lot of GC happening while index segments are flush to disk. At some point the node OOM ...



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