On 2013-11-06 23:53, chip wrote:
Ah, I had found in the mailing list some people using '64'. I've dropped it back to 10 and will see how things do.
One additional thing. I noticed in the defaults.inc.php file there was an option to enable the "-Cr#" flag for snmpbulkwalk and there was indication this would greatly speed up things. The default is set to off however. Doing some testing I've found a walk that took almost 6 minutes "-m IF-MIB -M /data/observium/mibs for ifEntry" was dropped to around a minute when "-Cr5" was set. I did this on the command line, not in Obs. Just curious what the downside is, google-fu isn't revealing much.
I'm running it as standard, as are a few other people I know of.
We define the settings used there in the per-device config, so we've only added it to devices we've tested. It's not on as default yet because there may still be variants or versions of systems we've tested where it doesn't work.
If it works fine for you when you turn it on, it's safe to use. It makes well written SNMP stacks much faster to poll.
It doesn't work properly at all on JunOS, because JunOS is derp. It works very well on Cisco's many SNMP stacks, on Arista and on UNIX-like systems running net-snmpd. It doesn't work properly with FreeBSD's bsnmpd.
adam.