Buff/cache usage increases unexpectedly











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I'm currently on Xubuntu 18.04 LTS, I have 12GB of RAM, and 120gb SSD and 500GB of free HDD space. I am dual booting my laptop with Xubuntu (on HDD) and Windows 10 (on SSD). I mostly use Xubuntu alot, since my daily work depends on it.



Currently, I have been experiencing strange issues on my Xubuntu. When I boot up, it always does "System File Check" which take ages (2 minutes)!! (I know on SSD it would be much faster, but this is way out of the ordinary to slow). I then check using free -m without any apps open (just default processes), and the buff/ cache is already in the 800mb value.



I then open up other programs like mozilla with 3-4 tabs, and it increases to 2-3gb of buff/ cache. On some occasion it has been in the 8-9GB range without any apps open. It stays stable in that range, doesn't drop/ increase.



What is the problem here? Is there a memory leak? Is it normal? How do I fix it? Reinstall Xubuntu?






xubuntu ram memory-usage







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  • All free memory can be used as cache, it will give memory back to you if there's other program wants to allocate memory. If your memory is sufficient, it can buffer everything you read so you won't have to access disk again. It's definitely not leak.
    – Alvin Liang
    Nov 21 at 16:13












  • Thank you Alvin!
    – adis
    Nov 21 at 16:20















up vote
0
down vote

favorite












I'm currently on Xubuntu 18.04 LTS, I have 12GB of RAM, and 120gb SSD and 500GB of free HDD space. I am dual booting my laptop with Xubuntu (on HDD) and Windows 10 (on SSD). I mostly use Xubuntu alot, since my daily work depends on it.



Currently, I have been experiencing strange issues on my Xubuntu. When I boot up, it always does "System File Check" which take ages (2 minutes)!! (I know on SSD it would be much faster, but this is way out of the ordinary to slow). I then check using free -m without any apps open (just default processes), and the buff/ cache is already in the 800mb value.



I then open up other programs like mozilla with 3-4 tabs, and it increases to 2-3gb of buff/ cache. On some occasion it has been in the 8-9GB range without any apps open. It stays stable in that range, doesn't drop/ increase.



What is the problem here? Is there a memory leak? Is it normal? How do I fix it? Reinstall Xubuntu?






xubuntu ram memory-usage







share|improve this question






















  • All free memory can be used as cache, it will give memory back to you if there's other program wants to allocate memory. If your memory is sufficient, it can buffer everything you read so you won't have to access disk again. It's definitely not leak.
    – Alvin Liang
    Nov 21 at 16:13












  • Thank you Alvin!
    – adis
    Nov 21 at 16:20













up vote
0
down vote

favorite









up vote
0
down vote

favorite











I'm currently on Xubuntu 18.04 LTS, I have 12GB of RAM, and 120gb SSD and 500GB of free HDD space. I am dual booting my laptop with Xubuntu (on HDD) and Windows 10 (on SSD). I mostly use Xubuntu alot, since my daily work depends on it.



Currently, I have been experiencing strange issues on my Xubuntu. When I boot up, it always does "System File Check" which take ages (2 minutes)!! (I know on SSD it would be much faster, but this is way out of the ordinary to slow). I then check using free -m without any apps open (just default processes), and the buff/ cache is already in the 800mb value.



I then open up other programs like mozilla with 3-4 tabs, and it increases to 2-3gb of buff/ cache. On some occasion it has been in the 8-9GB range without any apps open. It stays stable in that range, doesn't drop/ increase.



What is the problem here? Is there a memory leak? Is it normal? How do I fix it? Reinstall Xubuntu?






xubuntu ram memory-usage







share|improve this question













I'm currently on Xubuntu 18.04 LTS, I have 12GB of RAM, and 120gb SSD and 500GB of free HDD space. I am dual booting my laptop with Xubuntu (on HDD) and Windows 10 (on SSD). I mostly use Xubuntu alot, since my daily work depends on it.



Currently, I have been experiencing strange issues on my Xubuntu. When I boot up, it always does "System File Check" which take ages (2 minutes)!! (I know on SSD it would be much faster, but this is way out of the ordinary to slow). I then check using free -m without any apps open (just default processes), and the buff/ cache is already in the 800mb value.



I then open up other programs like mozilla with 3-4 tabs, and it increases to 2-3gb of buff/ cache. On some occasion it has been in the 8-9GB range without any apps open. It stays stable in that range, doesn't drop/ increase.



What is the problem here? Is there a memory leak? Is it normal? How do I fix it? Reinstall Xubuntu?






xubuntu ram memory-usage




xubuntu ram memory-usage






share|improve this question













share|improve this question











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asked Nov 21 at 15:53









adis

11




11












  • All free memory can be used as cache, it will give memory back to you if there's other program wants to allocate memory. If your memory is sufficient, it can buffer everything you read so you won't have to access disk again. It's definitely not leak.
    – Alvin Liang
    Nov 21 at 16:13












  • Thank you Alvin!
    – adis
    Nov 21 at 16:20


















  • All free memory can be used as cache, it will give memory back to you if there's other program wants to allocate memory. If your memory is sufficient, it can buffer everything you read so you won't have to access disk again. It's definitely not leak.
    – Alvin Liang
    Nov 21 at 16:13












  • Thank you Alvin!
    – adis
    Nov 21 at 16:20
















All free memory can be used as cache, it will give memory back to you if there's other program wants to allocate memory. If your memory is sufficient, it can buffer everything you read so you won't have to access disk again. It's definitely not leak.
– Alvin Liang
Nov 21 at 16:13






All free memory can be used as cache, it will give memory back to you if there's other program wants to allocate memory. If your memory is sufficient, it can buffer everything you read so you won't have to access disk again. It's definitely not leak.
– Alvin Liang
Nov 21 at 16:13














Thank you Alvin!
– adis
Nov 21 at 16:20




Thank you Alvin!
– adis
Nov 21 at 16:20















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