On Wed, 2007-02-07 at 10:41 +0100, Mikkel Mondrup Kristensen wrote: > On Tue, 2007-02-06 at 11:45 -0500, Eric Newton wrote: > > Hi Mikkel, > > > > The cyclic delay you see is zenperfsnmp loading its configuration from > > the Zeo database. With a lot interfaces, this can take a substantial > > period of time. You can speed this up by increasing the size of the > > in-memory and persistent object caches. Once the configuration is > > loaded, the configuration should sync quickly on successive cycles. > > > > Go to About -> Configuration -> edit configuration > > > > for zenperfsnmp. Add these three lines: > > > > cachesize 10000 > > pcachename zenperfsnmp > > pcachesize 100 > > > > Then restart zenperfsnmp. If this doesn't reduce your delay during the > > config cycle, please let us know! > It did not seem to help, i am up to 322 switches now and the server uses > most of its time reading rrd files with poll times around 400-700 > seconds. > The rrd files are on their own partion so i know that the reads are on > rrd files, its my understanding that rrd files should not require all > those reads, please correct me if i am wrong :). > I am willing to provide any amount of debug info to solve this. > I tried perftest i found on the rrdtools mailinglist (http://www.mail-archive.com/[email protected]/msg11861.html) and i dont get the read behavior i have when i use zenoss i and get writes around 60-100 MB/sec i dont know if this say anything about the problem i am having with zenoss but it seems my problem it with zenoss and not rrd itself. I pasted the output of perftest below:
Create 10 rrds 1 c/s (0.00092 sdv) Update 10 rrds 14323 u/s (0.00000 sdv) Create 10 rrds 1 c/s (0.00099 sdv) Update 20 rrds 14286 u/s (0.00001 sdv) Create 20 rrds 1 c/s (0.00195 sdv) Update 40 rrds 14067 u/s (0.00001 sdv) Create 40 rrds 1 c/s (0.00401 sdv) Update 80 rrds 13920 u/s (0.00002 sdv) Create 80 rrds 1 c/s (0.00782 sdv) Update 160 rrds 13332 u/s (0.00003 sdv) Create 160 rrds 1 c/s (0.01563 sdv) Update 320 rrds 13140 u/s (0.00004 sdv) Create 320 rrds 1 c/s (0.03135 sdv) Update 640 rrds 12639 u/s (0.00006 sdv) Create 640 rrds 6 c/s (0.10247 sdv) Update 1280 rrds 12773 u/s (0.00009 sdv) Create 1280 rrds 1 c/s (0.27096 sdv) Update 2560 rrds 11454 u/s (0.00014 sdv) Create 2560 rrds 2 c/s (0.22133 sdv) Update 5120 rrds 7058 u/s (0.00097 sdv) Create 5120 rrds 1 c/s (0.28336 sdv) Update 10240 rrds 1970 u/s (0.00046 sdv) Create 3072 rrds 2 c/s (0.30806 sdv) Update 13312 rrds 5323 u/s (0.00881 sdv) -- Mikkel Mondrup Kristensen ComX Networks A/S Network Operations Center _______________________________________________ zenoss-users mailing list [email protected] http://lists.zenoss.org/mailman/listinfo/zenoss-users
