Rrd files not updating Partuli com sxs 18
The problem does seem to be related to the number of shadow profiles rather than their individual characteristics.I deleted all of the shadow profiles and added back 46 of them, all with exactly the same parameters as before and including a number of which were failing to update the RRD files. I added another 45 and again all 91 worked correctly with the shadow profile RRD files being updated.
Please ensure you have an odbc setup that is 32 bit(there is a difference in how you locate it) and that the datasource name EXACTLY matches the datasource name in the report. The RRDtool plugin is one of collectd's most complex plugins.The reason for this is that it has been tuned to work well in big setups, where updating RRD-files causes serious IO-problems.I then added the remaining 43 shadow profiles bringing the total to 134.After this only 44 of the shadow profiles continued to update the RRD files with 90 of them now failing to do so.
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As long as all RRD-files (or at least the relevant parts of all RRD-files) fit into memory, the operating system's cache does a good job and usually IO is not a problem.