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Slowly running out of memory - RT-AC1900P (3.0.0.4.384_32799)

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Bill Waggoner

Occasional Visitor
I've started to investigate a problem that requires me to forceably reboot the router every so often, once a month or so. I suspected that it was running out of memory because that's what the ASUS app was showing on my iPad. A bit before the last time I rebooted the app showed 78% memory utilization but I had noticed much lower (50%) previously. I hadn't been paying much attention so I decided to watch more closely.

To do this I created a script which ssh's into the router and does a cat /proc/meminfo and puts the results into a CSV file. I loaded that into Excel and, sure enough, the memfree is slowly going down.

What is interesting is what is going up. Both Slab and SUnreclaim are both climbing. Sounds like a memory leak but I haven't figured out what is leaking yet.

Anyone have any ideas? Have you seen this too?

I haven't rebooted since the first few days of monitoring but I will maybe next week to see what happens.
 
The similar problem exists on RT-AC87U since last update (3.0.0.4.382_50702). The slabinfo shows high and increasing slab -
Code:
kmalloc-64        126227 133504     64   64    1 : tunables    0    0    0 : slabdata   2086   2086      0
Suspect a memory leak issue.
 
I believe that I've stopped the memory problem. Free memory is no longer disappearing and the SLAB numbers are fairly stable.

What I did was decline (actually, Withdraw) both the Trend and Adaptive QoS permissions. I wasn't actively using either one anyway.

Would it be useful to figure out which was causing the issue?
 
I believe that I've stopped the memory problem. Free memory is no longer disappearing and the SLAB numbers are fairly stable.

What I did was decline (actually, Withdraw) both the Trend and Adaptive QoS permissions. I wasn't actively using either one anyway.

Would it be useful to figure out which was causing the issue?

Useful to ASUS, so let them do it! :)

OE
 
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