Sunrpc settings are not persistent after reboot.

This document (7022831) is provided subject to the disclaimer at the end of this document.

Environment

SUSE Linux Enterprise Server 12 Service Pack 2 (SLES 12 SP2)
SUSE Linux Enterprise Server 12 Service Pack 1 (SLES 12 SP1)

Situation

Configuring "sunrpc.tcp_max_slot_table_entries" in the /etc/sysctl.conf are not persistent after a reboot. 
They can be set after boot-up by using "sysctl -p" which will read the settings from /etc/sysctl.conf and set them properly. 

error systemd-sysctl[941]: Couldn't write '128' to 'sunrpc/tcp_slot_table_entries', ignoring: No such file or directory.

Resolution

Load the sunrpc kernel module earlier in the boot process.
# echo sunrpc > /etc/modules-load.d/sunrpc.conf
Reboot and test to make sure settings were persistent.

Cause

The sunrpc kernel module is not loaded when the systemd-sysctl service is started.

Additional Information

Potential sunrpc settings that can be set in /etc/sysctl.conf
sunrpc.max_resvport = 1023
sunrpc.min_resvport = 665
sunrpc.nfs_debug = 0x0000
sunrpc.nfsd_debug = 0x0000
sunrpc.nlm_debug = 0x0000
sunrpc.rpc_debug = 0x0000
sunrpc.tcp_fin_timeout = 15
sunrpc.tcp_max_slot_table_entries = 65536
sunrpc.tcp_slot_table_entries = 2
sunrpc.transports = tcp 1048576
sunrpc.transports = udp 32768
sunrpc.transports = tcp-bc 1048576
sunrpc.udp_slot_table_entries = 16

Disclaimer

This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:7022831
  • Creation Date: 10-Apr-2018
  • Modified Date:03-Mar-2020
    • SUSE Linux Enterprise Server

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