3.5.1 Matrix Server Administration Guide

Chapter 8: Configure MxFS-Linux 171
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net.ipv4.tcp_sack
Enable/disable TCP selective ACKs. Because of
a bug in the Linux kernel, we recommend that
this feature be disabled.
10
net.core.rmem_default
Default global socket buffer size for read sock-
ets, all protocols.
135168 (132
KB)
524287
net.core.rmem_max
Default global maximum socket buffer size for
receive sockets, all protocols.
131071 (128
KB)
16777216
net.core.wmem_default
Default global socket buffer size for write sock-
ets, all protocols.
135168 (132
KB)
524287
net.core.optmem_max
The amount of memory allocated per socket
buffer for ancillary control information, which
is passed outside of the normal socket payload.
20480 524287
net.core.netdev_max_backlog
The number of unprocessed network packets
before the kernel drops them.
300 GbE: 30000
10GbE: 300000
sunrpc.tcp_slot_table_entries
The maximum number of outstanding NFS
RPC requests for the TCP network transport.
The buffer size available for NFSD read-ahead
activities on NFS clients is also affected.When
MxFS-Linux is installed, it sets the value to 128
in the /etc/sysconfig/nfs file.
16 128
sunrpc.udp_slot_table_entries
The maximum number of outstanding NFS
RPC requests for the UDP network transport.
The buffer size available for NFSD read-ahead
activities on NFS clients is also affected. When
MxFS-Linux is installed, it sets the value to 128
in the /etc/sysconfig/nfs file.
16 128
Tuning Point OS Default
Recommended