Today Rick Jones wrote: > > > the 'problem' is that a disk block which is only hit once a day > > will most likely not stay in buffer cache, so as rrdtool goes in to > > update the slow RRAs, it will first have to read the block in order > > to then update it ... > > It may not be sufficient, but under Linux at least there is the > posix_fadvise() call - might that enable rrdtool to request the cache to > retain file sections of particular interest?
rrdtool makes heavy use of fadvise (and madvise) otherwhise buffer cache use would be seriously poor as linux does excessive read-a-head ... cheers tobi > > rick jones > > -- Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland http://it.oetiker.ch t...@oetiker.ch ++41 62 775 9902 / sb: -9900 _______________________________________________ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
