03-23-2012 03:55 AM - edited 03-07-2019 05:44 AM
Hi All,
Below memory status alerts of are seen on our syslog server for Nexus 7K switch(Default VDC).
PLATFORM-2-MEMORY_ALERT_RECOVERED: Memory Status Alert : CRITICAL ALERT RECOVERED
PLATFORM-2-MEMORY_ALERT_RECOVERED: Memory Status Alert : MINOR ALERT RECOVERED
PLATFORM-2-MEMORY_ALERT_RECOVERED: Memory Status Alert : SEVERE ALERT RECOVERED
Memory threshold Not created on Nexus. Can we ignore this alert or does it impact our current network traffice ?
Please advice.
Thanks
Sri
03-23-2012 06:29 AM
Hi Sri
I wouldn't suggest you to ignore it.
This message stands that resources on your n7k were drained by some process and some services may be affected.
In addition to monitoring the total system memory utilization, the linux kernel also monitors the utilization in the low memory region (LowFree/LowTotal). Customer encountered the critical memory alert because the switch is using ~95% of the low memory region.
You can check it by issuing
N7K# sh system internal memory-alerts-log | inc "ALERT INFO|MemTotal|MemFree|LowTotal|
Which nx-os release do you use?
Alex
03-23-2012 07:02 AM
Hi Alex,
Thanks for your response...Nexus OS release : 5.1(3)
kickstart image file is: bootflash:///n7000-s1-kickstart-npe.5.1.3.bin
kickstart compile time: 12/25/2020 12:00:00 [03/11/2011 02:42:56]
system image file is: bootflash:///n7000-s1-dk9.5.1.3.bin
system compile time: 1/21/2011 19:00:00 [03/11/2011 03:37:35].
NEXUS# show system internal memory-alerts-log | inc "ALERT INFO|MemTotal|MemF
ree|LowTotal"
MINOR ALERT INFO
MemTotal: 8260944 kB
MemFree: 4481036 kB
LowTotal: 727120 kB
MemTotal: 8260944 kB
MemFree: 4481036 kB
LowTotal: 727120 kB
SEVERE ALERT INFO
MemTotal: 8260944 kB
MemFree: 4481152 kB
LowTotal: 727120 kB
MemTotal: 8260944 kB
MemFree: 4481036 kB
LowTotal: 727120 kB
CRITICAL ALERT INFO
MemTotal: 8260944 kB
MemFree: 4481068 kB
LowTotal: 727120 kB
MemTotal: 8260944 kB
MemFree: 4480820 kB
LowTotal: 727120 kB NEXUS-2
03-23-2012 07:57 AM
Sri
Please add this output:
show system internal kernel memory usage | in Low
And check this bug:
There is a high possibility that this is the reason why you have memory warnings.
HTH,
Alex
03-23-2012 08:11 AM
Alex,
Here is output..
NEXUS# show system internal kernel memory usage | in Low
LowTotal: 727120 kB
LowFree: 9856 kB
NEXUS-2# show system internal kernel memory usage | in Low
LowTotal: 727120 kB
LowFree: 9856 kB
03-23-2012 08:38 AM
To count current memory usage do following:
((727120-9856)/727120)*100% = 98%
So only 2% left. I'd suggest you to follow workaround described in a bug asap. ANd then upgrade.
HTH,
Alex
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