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How many JetsamEvents is normal to have on the 7 plus?

fel10

fel10

macrumors 68020
Original poster
Feb 2, 2010
2,312
3,676
Woodstock, GA USA
i just checked my log, and only today I already have 75 JetSamEvent. Which means low memory. Is that normal for a phone with 3 GB of ram? I also notice a lot of the apps and even some safari tabs reload a lot on my phone.

To check it, just go to Settings > Privacy > Diagnostics & Usage > Diagnostics & Usage Data
 
I think it really depends on what you use your device for. I have 1 JetSamEvent on my device, it was for 8 days ago. I typically don't keep many apps open in the App Switcher, so that might be the reason why I have so few.
 
fel10 said:
I just did a clean install, and without even installing any apps, I already had 20 of those. What the heck.
Click to expand...
Might be something after an install as iOS is doing a bunch of things. I have about a dozen or so from the first day when I got my phone and set it up and another dozen or so from the second day when I was setting up more things to my liking and downloading more apps and all that. But doesn't seem like I have any more since then (a little less than a month ago).

I do seem to have quite a few "stacks" and "periodic-microstackshot-report" ones (not even quite sure what those are).
 
C DM said:
Might be something after an install as iOS is doing a bunch of things. I have about a dozen or so from the first day when I got my phone and set it up and another dozen or so from the second day when I was setting up more things to my liking and downloading more apps and all that. But doesn't seem like I have any more since then (a little less than a month ago).

I do seem to have quite a few "stacks" and "periodic-microstackshot-report" ones (not even quite sure what those are).
Click to expand...
Agree

I have quite a few "periodic-microstackshot-report" ones too.
 
I have no problems with my iPhone 7plus. Its fast as I could want. I don't notice apps reloading or anything weird.

That being said, I seem to have 30 or so a day of these Jetsam events.

Does it really matter? Does this mean my phone has a memory problem? If so, I don't see it.

Why worry about it?
 
Same with me on my 4.7 iPhone 7. I get 25-80 a day. On my iPhone 6 on 9.3.5 I'd get 0-5 a day. The iPhone 7 is running from that same back up.

My 7 is fast and fine though. But every morning my safari needs to reload. I've seen this bug on every verson of iOS 10 yet. It just can't keep safari in memory overnight. Quite annoying.

Not sure why there is so many jetsam logs though but I guess it's "normal" for the 7.

Do you ever look at what your largest process was in the log? Overnight (without using the device) I had 8 jetsam logs from safari and WebKit alone!! Definitely some bugs there? Or maybe not?! If I look at my other ones I see a lot from clash of clans and Pokémon go. Maybe the iPhone is keeping closer track of low memory? Who knows. Only the apple engineers working on iOS 10 know for sure.
 
I am also plagued by these JetsamEvents on my iPhone 7 Plus (more that 50 a day)

Even on a clean install, it doesn't change anything.

I wouldn't care if I had not this behavior of apps and Safari refreshing far more that what would seem adequate...

RAM management seems odd too, as I notice I have almost all the time 500 MB of "free" RAM.
I'm not talking about "inactive" memory which would be normal but "free" memory.

I see iOS freeing up RAM all the time...
 
Plx32 said:
I am also plagued by these JetsamEvents on my iPhone 7 Plus (more that 50 a day)

Even on a clean install, it doesn't change anything.

I wouldn't care if I had not this behavior of apps and Safari refreshing far more that what would seem adequate...

RAM management seems odd too, as I notice I have almost all the time 500 MB of "free" RAM.
I'm not talking about "inactive" memory which would be normal but "free" memory.

I see iOS freeing up RAM all the time...
Click to expand...

I also only have about 500-600 ram free. When I close everything, it goes up to 1gb free, but I don't know what the phone is using the other 2 for. Im hoping this is just a software issue.
 
JetsamEvents typically occur when memory ls low.

edited to add: I have a lot of JetsamEvents as well, and my iPhone 7+ is running well, apart from 2 incidents, when I connected to my tb MBP and doing so caused the MBP to reboot.
 
Last edited:
I have around 30 a day. According to Apple they also come up if you close apps quickly after opening them, because there are still operations running but the OS is trying a force-quit and that can cause a memory leak.

That's what my Senior Advisor told me anyway.
 
Eduardboon said:
I have around 30 a day. According to Apple they also come up if you close apps quickly after opening them, because there are still operations running but the OS is trying a force-quit and that can cause a memory leak.

That's what my Senior Advisor told me anyway.
Click to expand...

This. ^. I would say the senior advisor is absolutely correct.
 
I still do not see how they indicate a problem as my 7+ works perfectly. Who care what is happening in the background, Apple's system is working well on my phone. I can remember seeing similar error messages on previous iPhones and never caused a problem.

Better things to worry about.
 
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