Today lily wrote: > Hello everyone : > > Recently I use the rrdtool to create about 12 thousand rrd-file, and > update them in 30s . RRDtools version is 1.2.27 and the OS is Linux - 2.6.9. > The disk is Raid 10 , and the FS is ext2 > I have encountered tow problem : > > The first one is the performance problem. I read the 'Tuning RRDtool > for performance', and do the vm Optimizations. But it seems not work. The IO > await list is sometime very high. > Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s rkB/s > wkB/s avgrq-sz avgqu-sz await svctm %util > cciss/c0d0 0.00 0.00 0.00 112.44 0.00 907.77 0.00 > 453.89 8.07 112.99 1001.39 9.23 103.73 > It can't update 12 thousand file in 30s. How can I improve its > performance ???
the problem could be your kernel version, the implementation of posix fadvise has seen quite some changes. > The second is sometime when I update the files , there is an error : > illegal attempt to update using time 1236857494 when last update > time is 1236857494 (minimum one second step) > but I use the timestamp is 1236886011, not the 1236857494. And I use > the rrdtool last to see the last update time of the file , I find the last > update time is 1236857468, also not 1236857494. I have debug a lot of time , > but have no idea about it . > I want to know is anyone encountered this problem ? Or know the solution I have never seen this problem ... cheers tobi > > > Thank you ! > > > -- 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-developers mailing list rrd-developers@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-developers
