ports/133758 and net-snmp-5.5 - inactive memory stil not counted as free memory

[Helmut Schneider]

Thomas Steen Rasmussen wrote:

> I am experiencing what seems like the problem in 
> http://www.freebsd.org/cgi/query-pr.cgi?pr=133758
> 
> I have net-snmp-5.5 installed on FreeBSD 7.2 i386 and it returns this:
> UCD-SNMP-MIB::memAvailReal.0 = INTEGER: 189072 kB
> UCD-SNMP-MIB::memTotalFree.0 = INTEGER: 273204 kB
> 
> When this is what 'top' says:
> Mem: 157M Active, 1467M Inact, 189M Wired, 8580K Cache, 112M Buf, 176M
> Free

IMHO ucd-snmp is completely foobar. See my PR:

http://www.freebsd.org/cgi/query-pr.cgi?pr=147468

But see also:

# snmpwalk -v2c -cpublic localhost .1.3.6.1.4.1.2021.4
UCD-SNMP-MIB::memIndex.0 = INTEGER: 0
UCD-SNMP-MIB::memErrorName.0 = STRING: swap
UCD-SNMP-MIB::memTotalSwap.0 = INTEGER: 3583872 kB
UCD-SNMP-MIB::memAvailSwap.0 = INTEGER: 3583872 kB
UCD-SNMP-MIB::memTotalReal.0 = INTEGER: 4179676 kB
UCD-SNMP-MIB::memAvailReal.0 = INTEGER: 1482980 kB
UCD-SNMP-MIB::memTotalFree.0 = INTEGER: 1589660 kB
UCD-SNMP-MIB::memMinimumSwap.0 = INTEGER: 16000 kB
UCD-SNMP-MIB::memShared.0 = INTEGER: 133364 kB
UCD-SNMP-MIB::memBuffer.0 = INTEGER: 427888 kB
UCD-SNMP-MIB::memCached.0 = INTEGER: 180428864 kB
UCD-SNMP-MIB::memSwapError.0 = INTEGER: noError(0)
UCD-SNMP-MIB::memSwapErrorMsg.0 = STRING:
# snmpwalk -v2c -cpublic localhost .1.3.6.1.4.1.2021.4
UCD-SNMP-MIB::memIndex.0 = INTEGER: 0
UCD-SNMP-MIB::memErrorName.0 = STRING: swap
UCD-SNMP-MIB::memTotalSwap.0 = INTEGER: 3583872 kB
UCD-SNMP-MIB::memAvailSwap.0 = INTEGER: 3583872 kB
UCD-SNMP-MIB::memTotalReal.0 = INTEGER: 4179676 kB
UCD-SNMP-MIB::memAvailReal.0 = INTEGER: 1317912 kB
UCD-SNMP-MIB::memTotalFree.0 = INTEGER: 3260720 kB
UCD-SNMP-MIB::memMinimumSwap.0 = INTEGER: 16000 kB
UCD-SNMP-MIB::memShared.0 = INTEGER: 109740 kB
UCD-SNMP-MIB::memBuffer.0 = INTEGER: 427888 kB
UCD-SNMP-MIB::memCached.0 = INTEGER: 0 kB
UCD-SNMP-MIB::memSwapError.0 = INTEGER: noError(0)
UCD-SNMP-MIB::memSwapErrorMsg.0 = STRING:
#

Within one or two seconds memTotalFree changed from 1589660 kB to
3260720 kB. According to "top" ~1.5GB is the correct value. Same for
memCached, flip-flopping from 180428864 kB(!!) to 0 kb within the same
second.

-- 
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