Hello everyone : <br><br> 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<br> I have encountered tow problem : <br>
<br> The first one is the performance problem. I read the '<font size="2">Tuning RRDtool for performance'</font>, and do the vm Optimizations. But it seems not work. The IO await list is sometime very high.<br>
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util<br> 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<br>
It can't update 12 thousand file in 30s. How can I improve its performance ???<br><br><br> The second is sometime when I update the files , there is an error : <br> illegal attempt to update using time 1236857494 when last update time is 1236857494 (minimum one second step)<br>
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 . <br>
I want to know is anyone encountered this problem ? Or know the solution<br> <br><br> Thank you !<br><br><br>-- <br>Yours Sincerely,<br>lleelm -at- gmail -dot- com<br>