RSA Authentication Manager 7.1 SP4 and RSA SecurID Appliance 3.0.4 show low free memory, with either the top or vmstat command.
Some SNMP traps for high memory utilization are being triggered even when the system is idle. This affects both Dell and Intel hardware appliances as well as virtual machines.
Free memory displayed with vmstat consistently reading low at between 95-100mb at all times, even when system is not under load:
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
2 0 20512 219480 64864 1275756 0 0 1 19 18 3 8 6 86 0
SNMP traps set to trigger against either top and vmstat are sending a false positive for memory shortfall. It would appear free mem is below a critical level of 5-10% available when using vmstat or top. In fact, this is in reality a false positive alert.
There is a false positive on memory utilization error when using top or vmstat with Authentication Manager and the RSA SecurID Appliance.
The RSA SecuriD Appliance 3.0 is an rPath Linux kernel. This particular version of Linux uses a memory management known as "lazy man" memory mapping.
Reading the -/+ buffers/cache field indicate in this instance of the older RSA SecuriD Appliance 3.0, that approximately 1.5 GB are free for re-allocation when system load increases; more than enough free memory.
On the same model Dell appliance updated to Authentication Manager 8.1 with SUSE Linux, we still see almost .7G available.
On the model with 8G of RAM, we see 3.6 GB of RAM available for reallocation when needed.