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New Member

Memory Status Alert logs on Nexus 7K

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

5 REPLIES
Cisco Employee

Memory Status Alert logs on Nexus 7K

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

New Member

Memory Status Alert logs on Nexus 7K

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

Cisco Employee

Memory Status Alert logs on Nexus 7K

Sri

Please add this output:

show system internal kernel memory usage | in Low

And check this bug:

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCtq62339

There is a high possibility that this is the reason why you have memory warnings.

HTH,

Alex

New Member

Memory Status Alert logs on Nexus 7K

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

Cisco Employee

Memory Status Alert logs on Nexus 7K

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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