Re: Perhaps in OID .1.3.6.1.2.1.2.2.1.10.3 are updated only every 30 seconds, why?
"Dave Shield" <[email protected]>
| Newsgroups | gmane.network.net-snmp.user |
|---|---|
| Message-ID | <[email protected]> |
On 18/11/2007, [email protected] <[email protected]> wrote: > -- Why are updated only every 30 seconds? When the agent receives a request for any information from the ifTable, it will read in the data for *all* interfaces. This process is relatively expensive, so it is cached for later use. This helps when walking the whole table. > -- In version smnpd 5.1.2, the data are updated through 1 second The 5.1.x code didn't have much support for data caching, so most MIB modules (including the ifTable) would retrieve data afresh for every single request. This gives more up-to-date information, at the cost of increased processing overheads. Later release lines improved the caching support, so the newer ifTable implementation makes use of this facility. > -- In man snmpd.conf found mention about versionClearCache, > thinking that might help Probably not. But have a look at the NET-SNMP-AGENT-MIB::nsCacheTable. That should allow you to tweak the expiry time of the ifTable cache, or turn it off completely (by setting it to 0). Dave ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Net-snmp-users mailing list [email protected] Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users