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JBoss EAP 6.x および JDG 6.x でクラスタリングを使用していると、JGroups がバッファーの警告を送受信します

Solution Verified - Updated -

Issue

  • JGroups では、インストールしたばかりの状態で、送受信バッファー値が以下のように設定されています。
[Server:server-four] 12:36:21,568 WARNING [org.jgroups.protocols.UDP] (ChannelService lifecycle - 1) send buffer of socket java.net.MulticastSocket@60c42064 was set to 640KB, but the OS only allocated 131.07KB.This might lead to performance problems.Please set your max send buffer in the OS correctly (e.g. net.core.wmem_max on Linux)

[Server:server-four] 12:36:21,568 WARNING [org.jgroups.protocols.UDP] (ChannelService lifecycle - 1) receive buffer of socket java.net.MulticastSocket@60c42064 was set to 25MB, but the OS only allocated 131.07KB.This might lead to performance problems.Please set your max receive buffer in the OS correctly (e.g. net.core.rmem_max on Linux)

  • 640KB (送信バッファー) および 25MB (受信バッファー) は、UDP に推奨される最低要件ですか?

  • これらの値に適した基準値は何ですか?

  • これらの値をハードコーディングすると、TCP 自動調整に効果がありますか?

  • これらの値を設定すると、どんな問題が発生しますか?

Environment

  • Red Hat JBoss Enterprise Application Platform (EAP)
    • 6.x
  • Red Hat JBoss Data Grid (JDG)
    • 6.x

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