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 15
SUSE Linux Enterprise Server 12

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:19-May-2022
    • SUSE Linux Enterprise Server

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