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I'm new to Linux metrics

in our test environment we experiment a slowness, after investigation we have found that the disk space used to store backup data is full, but what is wired for me is that the disk i/o is not high at all

we are working with MySQL server

here is the output of the top commandenter image description here

Hamza AZIZ
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    if the disk is full its like driving uphill with handbrake, however this screenshot does tell nothing. – djdomi Jul 09 '21 at 15:02
  • Thanks for your comment, what you need to know if this screenshots Do not say anything for you ? – Hamza AZIZ Jul 09 '21 at 17:12
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    Find the slow query, show it to us, provide `SHOW CREATE TABLE` and `EXPLAIN SELECT ...` From there, we can drive downhill. – Rick James Jul 09 '21 at 20:26
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    at first show us ` df -h ` and also the load level as also the output of lscpu for one cpu moreover how big is the db? – djdomi Jul 09 '21 at 20:39
  • i check the log file for slow query, but there is nothing there, i'm sure this is about no more enough space in the disk partition of backups, because when i deleted old backups the CPU return to its normal state, my question is why the disk i/o is not high considering that the problem is from the disk partition of backups – Hamza AZIZ Jul 13 '21 at 08:11

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