I think we got our definition mixed. I'll try again:
- the MIB environment variable controls which MIBs (text files) will be
parsed (when initializing snmp - init_snmp() )
- the parsed MIB files are loaded to memory, for use when
reading conf files. (it does not mean these MIBs we be supported by the
agent)
- the [--with-mib-modules, --with-out-mib-modules] tokes control which
MIBs the master agent will initialize (I defined this as 'load').
- I guess --with-mib-modules=ucdDemoPublic, will cuase the
master agent to call init_ucdDemoPublic()
Right?
Now.. more quesitons:
1) the --with-mib-modules do not affect sub-agents, right?
2) if MIBS environment variable is an empty string, are default MIBs
still being parsed?
3) Each Sub-agent takes ~600KB of RAM ( that is with MIBS set to empty
string)
this is the top utility printout:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+
COMMAND
12651 root 15 0 12136 3032 2440 S 0.0 0.6 0:00.12
notif-sub
12721 root 15 0 12136 2968 2416 S 0.0 0.6 0:00.04
notif-sub
a) Is the SHR (shared memory) amount a reasonable one? what is your
estimate on the lowets amount possible?
b) is the extra ~600KB per agent, a reasonable amount? what is
your estimate on the lowets amount possible?
c) What is in the other 9MB (12-3 MB) swaped files? is it the snmp
libraries (libsnmpagent, libsnmphelpers, libsnmpmibs,...)
Are they all necesary ?
4) To save disk space (in embedded system), could I cut down the size of
the libraries? (I need them at run-time, right?)
a) for example, say I use only one helper, not all of them, are
there configuration tokes to compile only partial libsnmphelpers?
Thank,
Erez.
-----Original Message-----
From: Dave Shield [mailto:[EMAIL PROTECTED]
Sent: Monday, January 16, 2006 3:00 PM
To: Makavy, Erez (Erez)
Cc: [email protected]
Subject: Re: snmpd reduce memory usage
On Sun, 2006-01-15 at 19:58 +0200, Makavy, Erez (Erez) wrote:
> 1) what exactly doess the environment variable MIBS affect?
> as I understand it it affect only the MIBs which the snmp
> libraries will be initialized for, but it does not decide which MIBs
> the snmpd loads. right?
Wrong.
The MIBS environment variable decides which MIB files should be loaded,
but does not affect which MIB modules are initialized.
> 1a) why in the firstplace are MIB text files parsed and loaded to
> the memory of the snmpd? what use does it have for them?
So that you can do something like:
view sysView included system
Without the MIB files, you'd have to do:
view sysView included .1.3.6.1.2.1.1
instead.
> 2) what exactly do these configure tokes affect:
> --with-mib-modules, --with-out-mib-modules ?
Those options control which MIB modules should be initialized by the
agent.
Dave
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