Re: 3850 using too much Memory?

Kgrevemberg · ‎04-02-2019

Hi all,

I have around 15 3850 switches that have 2.4gb of memory used. Seems weird to me as most of these switches should basically be at idle with no network activity on them. A few even have all ports shut. Solarwinds shows them as having 60% memory used. Is this considered high? or is this ok for a 3850?

Thanks for your advise.

Using IOS: cat3k_caa-universalk9.16.06.05.SPA.bin

Here is output from one switch.

3850_AAR3_SW#show processes memory sorted allocated
Processor Pool Total: 873432896 Used: 312094784 Free: 561338112
lsmpi_io Pool Total: 6295128 Used: 6294296 Free: 832

PID TTY Allocated Freed Holding Getbufs Retbufs Process
0 0 315741416 42412008 245863728 0 0 *Init*
73 0 29119832 1373944 24823760 0 0 IOSD ipc task
541 0 18141600 19968552 117352 0 0 SNMP ENGINE
452 0 15025744 13189888 125552 0 0 PDU DISPATCHER
78 0 9043864 8980096 108768 0 0 Crimson flush tr
222 2 7183008 6022064 1225800 0 0 SSH Process
0 0 6047536 5265440 638496 17486679 0 *Dead*
10 0 4804400 4530768 387280 4516442 4338774 Pool Manager
427 0 3938440 5680 3989760 849828 0 EEM ED Syslog
161 0 3808776 11288 1031488 0 0 CWAN OIR Handler
316 0 3249376 3231144 87232 0 0 IP SNMP
538 0 2998424 2998208 69216 0 0 mdns Timer Proce
4 0 2426976 23800 2272656 0 0 RF Slave Main Th
382 0 2004888 1725680 213720 0 0 Crypto CA
409 3 1689168 1571208 181736 0 0 SSH Process
440 0 1519296 30656 1533400 0 0 EEM Server
1 0 1466480 3472 1508008 0 0 Chunk Manager
553 0 1001472 42848 951680 0 0 OSPF-100 Router
160 0 665288 665288 45000 0 0 MATM RP Shim Pro
213 0 631448 340904 265968 0 0 mDNS
59 0 483648 525224 45864 0 0 crypto sw pk pro
201 0 464640 185240 84648 0 0 CDP Protocol
428 0 380872 5680 432192 72316 0 EEM ED Generic
261 0 371024 2032 437800 0 0 IP RIB Update
403 0 310024 576 378448 0 0 Crypto IKEv2
66 0 309792 1584 76120 0 0 Net Background
283 0 284344 0 73216 0 0 TCP Protocols
474 0 277736 231120 118640 0 0 VLAN Manager
158 0 271576 271576 45000 0 0 MGMTE stats Proc
448 0 270408 98584 216728 0 0 Call Home proces
380 0 243896 242776 46120 0 0 crypto engine pr
264 0 240200 6720 237976 0 0 RADIUS
15 0 186136 186136 45000 0 0 DB Lock Manager
539 0 167920 448 236472 0 0 MRIB Process
324 0 140256 0 185256 0 0 L2FIB Event Disp
548 0 128712 78544 73472 0 0 NTP
372 0 107336 107784 45000 0 0 DiagCard1/-1
305 0 103112 59224 110640 0 0 CEF: IPv4 proces
358 0 102904 0 147904 0 0 MMA DB TIMER
37 0 102856 2200 145656 0 0 ARP Input
164 0 100560 0 145560 0 0 radius dtls clie
182 0 100224 17872 94752 0 0 DTP Protocol
361 0 99192 448 143744 0 0 Timer Library
200 0 98792 0 143792 0 0 ACCT Periodic Pr
207 0 98792 0 167792 0 0 IPAM Manager

Reza Sharifi · ‎04-02-2019

Hi,

60% is too high. The average memory usage for most 3850s or at least the ones I checked is between 35 to 45% running 03.07.02E RELEASE

It may be a bug in 6.06.05

You may want to try a different version on one or 2 devices and compare.

HTH

jalejand · ‎04-02-2019

You might be running into a memory leak on the 3650, to confirm that, actively monitor the memory statistics to see which process is incrementing on a daily basis.

Run these commands at least twice a day:
show platform software process list switch active R0 sort memory
show platform software status control-processor brief

Save its contents and upload them to see which IOS XE process is increasing its utilization.

Also, for a 3k switch with 16.6.5 which is failry new, I would suggest you to open a TAC case.

Kgrevemberg · ‎04-04-2019

Thanks for your reply. I will start running these commands.

Of the 15 3850's running high memory, I did take one and put it on the 16.6.05 ios the day I posted this. The rest are still on 16.6.03. That being said, all are showing the same memory usage on different ios versions.

Again, thanks for your input!

Kgrevemberg · ‎04-04-2019

Thanks for your reply. I did leave out a detail i meant to mention in my original post.

Of the 15 3850's running high memory, I did take one and put it on the 16.6.05 ios the day I posted this. The rest are still on 16.6.03. That being said, all are showing the same memory usage on different ios versions.

Again, thanks for your input!