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List:       net-snmp-bugs
Subject:    [ net-snmp-Bugs-617592 ] Erroneous read of memory table
From:       noreply () sourceforge ! net
Date:       2002-10-15 10:40:24
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Bugs item #617592, was opened at 2002-10-02 16:54
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=112694&aid=617592&group_id=12694

Category: agent
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: Erroneous read of memory table

Initial Comment:
On some PC on which I have installed the Ucd-
Snmp (version 4.2.5) I have the following problem.

The command:
"snmpwalk localhost 
my_community  .1.3.6.1.4.1.2021.4 "

gives me this response:

enterprises.ucdavis.memory.memIndex.0 = 0
enterprises.ucdavis.memory.memErrorName.0 = 
swap
enterprises.ucdavis.memory.memTotalSwap.0 = -1
enterprises.ucdavis.memory.memAvailSwap.0 = -1
enterprises.ucdavis.memory.memTotalReal.0 = -1
enterprises.ucdavis.memory.memAvailReal.0 = -1
enterprises.ucdavis.memory.memTotalFree.0 = -2
enterprises.ucdavis.memory.memMinimumSwap.0 
= 16000
enterprises.ucdavis.memory.memShared.0 = -1
enterprises.ucdavis.memory.memBuffer.0 = -1
enterprises.ucdavis.memory.memCached.0 = -1
enterprises.ucdavis.memory.memSwapError.0 = 1
enterprises.ucdavis.memory.memSwapErrorMsg.0 = 
Running out of swap space (-1)

Instead, if I execute the command:

"cat /proc/meminfo"

the response is:

total:    used:    free:  shared: buffers:  cached:
Mem:  2111762432 931586048 1180176384        0 
50974720 130379776
Swap: 2097143808  1101824 2096041984
MemTotal:      2062268 kB
MemFree:       1152516 kB
MemShared:           0 kB
Buffers:         49780 kB
Cached:         126296 kB
SwapCached:       1028 kB
Active:         166272 kB
Inactive:        29788 kB
HighTotal:     1179584 kB
HighFree:      1027116 kB
LowTotal:       882684 kB
LowFree:        125400 kB
SwapTotal:     2047992 kB
SwapFree:      2046916 kB

(the "file" /proc/meminfo is also used into the 
source file \agent\mibgroup\ucd-snmp\memory.c )

Obviously these values are correct!

I don't know how, but on some PC that has the 
same configuration (PC type, Memory, processes, 
etc...)
I have the result show above. 
On other PC that has the same UCD-SNMP, all 
works fine. Why?

Besides, the same source file try to use the 
command "/usr/sbin/swapinfo -r" that is not 
present on any of the PC I use. Why?

Thanks in advance for any support.
Bye
Salvatore Merola


----------------------------------------------------------------------

Comment By: Salvatore Merola (salvatoremerola)
Date: 2002-10-15 12:40

Message:
Logged In: YES 
user_id=621974

Hi.
I've downloaded and install'd the 4.2.6 version, and it 
solve the memory problem existing on 4.2.5 version.
I've tried on the same PC where 4.2.5 was not 
functioning properly, and it seems to me that now it's 
all ok.
Perhaps is dued to this "fix" I've found into the 
ChangeLog file of 4.2.6 version:

2002-05-21 13:20  dts12

   * agent/mibgroup/ucd-snmp/memory.c:

   Latch memory reporting at 2^31-1, rather than 2^32-
1 since these objects are defined as (signed) Integer32.
   Only latch if the value is *greater* than this threshold, 
not less!


So maybe is possible to "close" this item, but I hope in 
some follow up about this problem.

Thanks
Salvatore Merola


----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=112694&aid=617592&group_id=12694


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