BatchSize¶

Maximum messages retrieved per recvmmsg() call when available.

This parameter applies to imudp: UDP Syslog Input Module.

Name:: BatchSize
Scope:: module
Type:: integer
Default:: module=32
Required?:: no
Introduced:: at least 8.x, possibly earlier

Description¶

This parameter is only meaningful if the system supports recvmmsg() (newer Linux systems do this). The parameter is silently ignored if the system does not support it. If supported, it sets the maximum number of UDP messages that can be obtained with a single OS call. For systems with high UDP traffic, a relatively high batch size can reduce system overhead and improve performance. However, this parameter should not be overdone. For each buffer, max message size bytes are statically required. Also, a too-high number leads to reduced efficiency, as some structures need to be completely initialized before the OS call is done. We would suggest to not set it above a value of 128, except if experimental results show that this is useful.

Module usage¶

module(load="imudp" BatchSize="...")

BatchSize¶

Description¶

Module usage¶

See also¶