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StorageGRID 11.1よりも前のリリースでの再起動に関係なく、常に高いJavaヒープ使用率

環境

  • StorageGRID Webscale 10.3
  • StorageGRID Webscale 10.4の場合
  • StorageGRID Webscale 11.0

問題

CAHPのアラーム(Java Heap Usage)は常に報告されます。

'top -b -n 1' lumberjackのsystem_commandsでは、cassand+がメモリとCPUを大量に消費していることが示されています。

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
  652 cassand+  20   0 63.437g 0.011t 2.889g S 125.3 47.1   1355:59 java


'nodetool cfstats'lumberjackのcassandra/system_commandsでkey_prefix_by_bucketは、次の行に大きな行があります。

      Table: key_prefix_by_bucket
      SSTable count: 8
      Space used (live), bytes: 1880268774
      Space used (total), bytes: 1880268774
      Off heap memory used (total), bytes: 724800
      SSTable Compression Ratio: 0.3176106335841224
      Number of keys (estimate): 1024
      Memtable cell count: 2970
      Memtable data size, bytes: 808762
      Memtable switch count: 428
      Local read count: 4225600
      Local read latency: 6.692 ms
      Local write count: 86867
      Local write latency: 0.026 ms
      Pending tasks: 0
      Bloom filter false positives: 0
      Bloom filter false ratio: 0.00000
      Bloom filter space used, bytes: 10688
      Bloom filter off heap memory used, bytes: 10624
      Index summary off heap memory used, bytes: 384
      Compression metadata off heap memory used, bytes: 713792
      Compacted partition minimum bytes: 150
      Compacted partition maximum bytes: 1386179893   <<<< 1.4G
      Compacted partition mean bytes: 132014784
      Average live cells per slice (last five minutes): 1.0
      Average tombstones per slice (last five minutes): 0.0

 

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