[rrd-users] "rrdtool: can't resolve symbol 'posix_fadvise'" What does this mean?

Steve Shipway s.shipway at auckland.ac.nz
Sat Oct 23 22:13:36 CEST 2010

fadvise is the function used for providing hints for memory-mapped IO functions, which means rrdtool 1.4 (I think) so I'm not sure how you're getting this when you say you installed RRDTool 1.2!

The error message indicates that the RRDTool libraries cannot find the required function in the dynamically-loaded libraries.

You might need to install the appropriate libraries for mmap and fadvise support?  Or you might need to recompile rrdtool from the source code for your particular flavour of unix?


Steve Shipway
University of Auckland ITS
UNIX Systems Design Lead
s.shipway at auckland.ac.nz
Ph: +64 9 373 7599 ext 86487

From: rrd-users-bounces+s.shipway=auckland.ac.nz at lists.oetiker.ch [rrd-users-bounces+s.shipway=auckland.ac.nz at lists.oetiker.ch] on behalf of Martin [flottkoppen at gmail.com]
Sent: Sunday, 24 October 2010 4:19 a.m.
To: rrd-users at lists.oetiker.ch
Subject: [rrd-users] "rrdtool: can't resolve symbol 'posix_fadvise'" What does this mean?


I'm setting up 1-wire net to log different temperature sensors.
I have a Seagate Dockstar running OpenWrt, OWFS and RRDTool.
My sensors work fine but I have problem with RRDTool.
I have no idea what "rrdtool: can't resolve symbol 'posix_fadvise'" mean,
can someone give me a hint where to start looking?

root at OpenWrt:~/root/bin# ./show_temp.sh
rrdtool: can't resolve symbol 'posix_fadvise'
root at OpenWrt:~/root/rrddata# rrdtool fetch temp.rrd AVERAGE -s -1h
rrdtool: can't resolve symbol 'posix_fadvise'

I have installed the following packages:
collectd-mod-rrdtool Version: 4.9.1-3
librrd Version: 1.2.30-1
rrdcgi Version: 1.2.30-1
rrdcollect Version: 0.2.4-1
rrdtool 1.2.30-1

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