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  1. RHEL
  2. RHEL-25847

the network-throughput profile carries inconsistent values WRT the rhel-9 kernel

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    • rhel-9.4
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    • tuned
    • None
    • tuned-2.22.1-1.el9
    • Patch, Upstream
    • sst_cs_infra_services
    • ssg_core_services
    • 26
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      The network-throughput specifies:

      # Increase kernel buffer size maximums.  Currently this seems only necessary at 40Gb speeds.
#
# The buffer tuning values below do not account for any potential hugepage allocation.
# Ensure that you do not oversubscribe system memory.
net.ipv4.tcp_rmem="4096 87380 16777216"

      Anyway in the rhel-9 kernel, the default values for net.ipv4.tcp_rmem are:

      4096	131072	6291456

      that is, network-throughput actually reduces the default/initial receiver buffer size.

      The profile should be updated to at least:

      net.ipv4.tcp_rmem="4096 131072 16777216"

            jskarvad Jaroslav Skarvada
            pabeni@redhat.com Paolo Abeni
            Jaroslav Skarvada Jaroslav Skarvada
            Robin Hack Robin Hack
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              Created:
              Updated:
              Resolved: