System_Server (Android OS) High CPU and Lag

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guruleenyc

Senior Member
Aug 6, 2010
315
13
CT
Model: Galaxy Note 4
Android: 6.01
Rooted: No

My phone once again is almost impossible to use due to constant lag and slowness. After using one of many apps to identify what was consuming all my CPU I discovered it was the Android OS process and then I drilled down using top command (Elixir 2 app) to identify sub-process system_server. The system_server process was constantly utilizing >40% CPU and when this is coupled with user processes, my CPU was pegged in the 95-100% all the time. This made my phone just about impossible to use.

I encountered this issue approx. 3mo ago and I tried everything to resolve, but ended up doing a factory reset to resolve it. after the same thing a few months ago. Doing a factory reset was the only resolution unfortunately at the time. Now that it the issue has returned, I have tried just about everything to fix it without doing a factory reset, here are some of the trouble-shooting:
  • Toggled bluetooth on/off
  • Disabled improve location accuracy options for both BT and WiFi
  • Removed and re-added my 2 Google accounts
  • Disabled Google account sync of Gmail, and selective options.
  • Toggled from Global/GSM to LTE mobile network mode

What did clear the system_server CPU usage issue was putting my phone in Airplane Mode. All this tells me it is radio related....

My phone has been extremely slow and hanging as a result the past three days to a point where it was FRUSTRATING the hell out me, at one point I almost threw it!!! After searching high and low on the web, I couldn't deal with it any long----so I too the plunge and performed another factory reset---which fixed the problem. Since this was the second time in 4 months, I'd like help identifying what is causing this to avoid it in the future.

Thank you in advance everyone!
 
Last edited:
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guruleenyc

Senior Member
Aug 6, 2010
315
13
CT
Bump; 24 views and no replies yet.... I cannot be the only one who experienced this issue. Can we start a dialog on possible causes and fixes other than a full factory reset?

Thank you in advance,
 

mojoswagger1980

Senior Member
May 18, 2014
359
45
Model: Galaxy Note 4
Android: 6.01
Rooted: No

My phone once again is almost impossible to use due to constant lag and slowness. After using one of many apps to identify what was consuming all my CPU I discovered it was the Android OS process and then I drilled down using top command (Elixir 2 app) to identify sub-process system_server. The system_server process was constantly utilizing >40% CPU and when this is coupled with user processes, my CPU was pegged in the 95-100% all the time. This made my phone just about impossible to use.

I encountered this issue approx. 3mo ago and I tried everything to resolve, but ended up doing a factory reset to resolve it. after the same thing a few months ago. Doing a factory reset was the only resolution unfortunately at the time. Now that it the issue has returned, I have tried just about everything to fix it without doing a factory reset, here are some of the trouble-shooting:
Toggled bluetooth on/off
Disabled improve location accuracy options for both BT and WiFi
Removed and re-added my 2 Google accounts
Disabled Google account sync of Gmail, and selective options.
Toggled from Global/GSM to LTE mobile network mode


What did clear the system_server CPU usage issue was putting my phone in Airplane Mode. All this tells me it is radio related....

My phone has been extremely slow and hanging as a result the past three days to a point where it was FRUSTRATING the hell out me, at one point I almost threw it!!! After searching high and low on the web, I couldn't deal with it any long----so I too the plunge and performed another factory reset---which fixed the problem. Since this was the second time in 4 months, I'd like help identifying what is causing this to avoid it in the future.

Thank you in advance everyone!
I can see why you arrived at that conclusion but I'd caution a second look . I think its your wakelocks bud which is radio connected . until I disabled the lame google one my phone would get ridiculously hot and I mean physically hot as in to the touch turns out my problem was all the damn services the play store is attempting to use. It$ rediculous 1 app has twice almost 3 times as many service request as the rest of the phone . makes me wish play games was Foss compatible so bad I threw in on the bounty for it. But yeah try a wakelock sheriff specifically on play services and its stupid 22 (I think was what mine was) connected services and see if that helps
 
Last edited:

Shortydesbwa

Member
Jan 27, 2012
23
4
It looks like removing the screen pattern/password stops bumping system_server +110%, and it runs ≃ 1% CPU and 6% RAM.
Accordingly, CPU frequency is also lower. (1,4GHZ to 1Ghz).
 

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    Model: Galaxy Note 4
    Android: 6.01
    Rooted: No

    My phone once again is almost impossible to use due to constant lag and slowness. After using one of many apps to identify what was consuming all my CPU I discovered it was the Android OS process and then I drilled down using top command (Elixir 2 app) to identify sub-process system_server. The system_server process was constantly utilizing >40% CPU and when this is coupled with user processes, my CPU was pegged in the 95-100% all the time. This made my phone just about impossible to use.

    I encountered this issue approx. 3mo ago and I tried everything to resolve, but ended up doing a factory reset to resolve it. after the same thing a few months ago. Doing a factory reset was the only resolution unfortunately at the time. Now that it the issue has returned, I have tried just about everything to fix it without doing a factory reset, here are some of the trouble-shooting:
    • Toggled bluetooth on/off
    • Disabled improve location accuracy options for both BT and WiFi
    • Removed and re-added my 2 Google accounts
    • Disabled Google account sync of Gmail, and selective options.
    • Toggled from Global/GSM to LTE mobile network mode

    What did clear the system_server CPU usage issue was putting my phone in Airplane Mode. All this tells me it is radio related....

    My phone has been extremely slow and hanging as a result the past three days to a point where it was FRUSTRATING the hell out me, at one point I almost threw it!!! After searching high and low on the web, I couldn't deal with it any long----so I too the plunge and performed another factory reset---which fixed the problem. Since this was the second time in 4 months, I'd like help identifying what is causing this to avoid it in the future.

    Thank you in advance everyone!