Gap in chart

torrielw

Could someone please explain why there are gaps in my charts.

Request time frame 1/25/2008 8:00 am to 1/25/2008 9:00 am Sample Interval = 10 mins. (5 mins is even worse.)

Node polling interval every 90 secs.

Statistic collection every 5 mins.

Interface polling 90 sec.

Stats collection every 5 mins.

chart gap.png

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mark_wiggans

Go
to Administrative Tools > Performance and see what the write disk queue
lengths on the SQL server are? Are the gaps happening with all charts?

FormerMember

Mark - I'm having the same problem and my ADQL's on the SQL server are pegged at 90-100. RAID 5 on a hefty box - what could be the issue? Write performance to the DB & logs?

I've stopped NetFlow and the ADQL's dropped to next to nothing. We're only receiving flows from 10 devices, at around 33Mbps avg, and our retention is uncompressed 1hr, compressed 3days.

FormerMember

After waiting a night, the gaps are still there to some degree and I don't think it's the ADQL on the SQL server. At either 5/10/15min I see the same issue across all charts - spotty gaps.

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borgan

How many elements are you monitoring? How many polls per second is your polling engine utilizing now?