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Cassand拉 数据库的StorageGRID高CPU利用率会导致S3客户端延迟增加

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适用场景

  • NetApp 存储网格
  • 软件版本11.6及更高版本

问题描述

  1. 下面显示的所有指标均可在StorageGRID网格管理器 中的“支持 ”> “指标”下找到
  2. 存储节点显示的Cassand拉CPU利用率超过85%、 而I/O 等待时间极短。可在 Node (Internal Use) Grafana信息板下找到此信息。

大量Cassanda任务待定任务队列太大KB CPU利用率(按服务).png

大量Cassand拉 任务待定任务队列太大KB CPU Utilization.png

  1. Cassand拉ReadStage始终处于其最大级别。可 在 CassandraNode OverviewGrafana信息板下找到此信息。
大量Cassand拉 任务待定任务队列太大KB线程池活动Tasks.png
  1. 一个Cassanda表显示数百秒内的极高延迟。可在 CassandraNode Overview Grafana信息板下找到此信息。
    1. 以下示例显示了具有如此高延迟的object_by_version。请注意 、它可以是任何表。

大量Cassand拉 任务待定任务队列太大KB读取延迟、作者为Table.png

  1. 在节点的Cassand拉 目录中、以下命令将返回100个以上的条目。请考虑检查轮换日志文件(即 jstack.log.1)。 

# cd /var/local/log/cassandra/jstack/
# grep -c Murmur3 jstack.log
8393

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