[rrd-users] Re: RRDTOOL - SNMP & System Resources

[Chan Chi Hung]

I would suggest you stagger your jobs over the 5 minutes interval 
instead of trying to do everything at exactly every 5 minutes. Try
0,5,10,15,20,25,30,35,40,45,50,55 * * * * do 1/5th of the job
1,6,11,16,21,26,31,36,41,46,51,56
2,7,12,17,22,27,32,37,42,47,51,57
3,8,13,18,23,28,33,38,43,48,53,58
4,9,14,19,24,29,34,39,44,49,54,59

Ensure your 1/5th job finishes with 1 minute

1250 RRDs - are you storing indiviudal DS in its own RRD. Say you 
collect ifInOctets, ifOutOctets for router1/router2/router3. You may be 
creating 6 RRDs where you can do with 3 in a logical way. Simply create 
router1.rrd with DS ifInOctets and ifOutOctets. This will definitely cut 
down the number of RRDs

Simone Felici - Alpikom Spa wrote:

> Hi to all!
> 
> I've al little problem with my server, rrdtool and maybe snmp.
> 
> My server is collecting informations and updating more or less 1250 rrd
> files.
> Most of these files are collecting traffic informations on routers via SNMP
> and my custom scripts.
> These scripts simply checks the uptime of the device and then get the
> COUNTER32 values to update the rrd files.
> 
> My problem is that my system crash one time every week. I also have infos
> about the memory utilization and about the CPULOAD (graph too!) and I can
> see, a half day befor the crash, the CPULOAD increase much within 6-12 hours
> and then no response from the server.
> Only the ping works, everything else is not responding, like the server has
> a big amount of resources used.
> No way to use the console to check... No infos into logs, the server doesn't
> log after crash.
> What about the memory... The server has 512MB DDR ECC RAM, after reboot, the
> free memory costantly decrase and after a day only 8MB RAM are free.... This
> free mem will stay allocated somewhere.
> 
> At the same time the swap is growing until 40MB... When it reach 40MB, a
> week is passed and my server crashs again.
> 
> Server:
> Dual process Intel Xeon 2,4Ghz
> 2x DDR ECC PC2100 RAM
> RAID5 SATA 10.000RPM
> RedHat 9.0
> 
> I know this mailinglist is to write about rrdtool and not snmp, but maybe
> the two things are correlated.
> I would only know if someone has a similar problem and an idea on how to
> solve it (1 week uptime is not much) or where to search/work.
> Increase RAM?
> 
> Thank's in advice and sorry for my terrible english ;)
> 
> Bye
> 
> 
> Simon
> 
> Simone Felici        E-Mail: s.felici at alpikom.it
> Divisione Tecnica    info: 800 969 800
> Alpikom S.p.A.       URL: http://www.alpikom.it
> 
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-- 

CHAN CHI HUNG
Managed Computing Competency Centre
NTU, MPE, Block N3, #01c-10
50 Nanyang Avenue, Singapore 639798
Tel: +65 6790 4420 (O) Fax: +65 6316 0042
Email: chihung at mc-3.org   URL: www.mc-3.org

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