Ram in use = 90..%

[Mike Hathaway]

I upgraded to 11.2 and am getting this error once or twice a day
ram in use = 90.3% and generally less than an hour later I get a green problem Covered from Warning Ram in use (was warning for 22 seconds)
What's up with this?
I have 32 gigs of ram on an 8 TB zfs2 6 drive array. This was not an issue before 11.2

 

[dlavigne]

Anything in /var/log/messages around the time of the alert?

 

[Mike Hathaway]

Anything in /var/log/messages around the time of the alert?

The alert, I am not worried as it seems to self-correct. I have 2 ssd cache drives in the system. I have one jail running duplicati that I have not migrated to IOcage but there are no VM's to cause any spiking.

 

[Mike Hathaway]

There are alerts
Gone alerts:
* Unable to run alert source 'smartd'
Traceback (most recent call last):
File "/usr/local/lib/python3.6/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
File "/usr/local/www/freenasUI/freeadmin/sqlite3_ha/base.py", line 412, in execute
execute = self.locked_retry(Database.Cursor.execute, query, params)
File "/usr/local/www/freenasUI/freeadmin/sqlite3_ha/base.py", line 403, in locked_retry
raise e
File "/usr/local/www/freenasUI/freeadmin/sqlite3_ha/base.py", line 389, in locked_retry
rv = method(self, *args, **kwargs)
sqlite3.OperationalError: database is locked

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/usr/local/lib/python3.6/site-packages/middlewared/plugins/alert.py", line 358, in __run_source
alerts = (await alert_source.check()) or []
File "/usr/local/lib/python3.6/site-packages/middlewared/alert/base.py", line 96, in check
return await self.middleware.run_in_thread(self.check_sync)
File "/usr/local/lib/python3.6/site-packages/middlewared/main.py", line 1009, in run_in_thread
return await self.loop.run_in_executor(executor, functools.partial(method, *args, **kwargs))
File "/usr/local/lib/python3.6/concurrent/futures/thread.py", line 56, in run
result = self.fn(*self.args, **self.kwargs)
File "/usr/local/lib/python3.6/site-packages/middlewared/plugins/../alert/source/smartd.py", line 12, in check_sync
("srv_enable", "=", True)]):
File "/usr/local/lib/python3.6/site-packages/middlewared/main.py", line 1139, in call_sync
return fut.result()
File "/usr/local/lib/python3.6/concurrent/futures/_base.py", line 425, in result
return self.__get_result()
File "/usr/local/lib/python3.6/concurrent/futures/_base.py", line 384, in __get_result
raise self._exception
File "/usr/local/lib/python3.6/site-packages/middlewared/main.py", line 1063, in _call
return await run_method(methodobj, *args)
File "/usr/local/lib/python3.6/site-packages/middlewared/main.py", line 1009, in run_in_thread
return await self.loop.run_in_executor(executor, functools.partial(method, *args, **kwargs))
File "/usr/local/lib/python3.6/concurrent/futures/thread.py", line 56, in run
result = self.fn(*self.args, **self.kwargs)
File "/usr/local/lib/python3.6/site-packages/middlewared/schema.py", line 668, in nf
return f(*args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/middlewared/plugins/datastore.py", line 175, in query
select=options.get('select'),
File "/usr/local/lib/python3.6/site-packages/middlewared/plugins/datastore.py", line 88, in __queryset_serialize
for i in qs:
File "/usr/local/lib/python3.6/site-packages/django/db/models/query.py", line 256, in __iter__
self._fetch_all()
File "/usr/local/lib/python3.6/site-packages/django/db/models/query.py", line 1087, in _fetch_all
self._result_cache = list(self.iterator())
File "/usr/local/lib/python3.6/site-packages/django/db/models/query.py", line 54, in __iter__
results = compiler.execute_sql()
File "/usr/local/lib/python3.6/site-packages/django/db/models/sql/compiler.py", line 835, in execute_sql
cursor.execute(sql, params)
File "/usr/local/lib/python3.6/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
File "/usr/local/lib/python3.6/site-packages/django/db/utils.py", line 94, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/usr/local/lib/python3.6/site-packages/django/utils/six.py", line 685, in reraise
raise value.with_traceback(tb)
File "/usr/local/lib/python3.6/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
File "/usr/local/www/freenasUI/freeadmin/sqlite3_ha/base.py", line 412, in execute
execute = self.locked_retry(Database.Cursor.execute, query, params)
File "/usr/local/www/freenasUI/freeadmin/sqlite3_ha/base.py", line 403, in locked_retry
raise e
File "/usr/local/www/freenasUI/freeadmin/sqlite3_ha/base.py", line 389, in locked_retry
rv = method(self, *args, **kwargs)
django.db.utils.OperationalError: database is locked


Alerts:

 

[dlavigne]

Please create a report at bugs.freenas.org and post the issue number here.

 

[Apollo]

@
Mike Hathaway
This is not an issue but Netdata is making you believe it is.
Netdata is a service introduced with Freenas 11.2 Beta and just generates alerts when certain thresholds are met.
RAM usage with ZFS is expected to grow until all the RAM is allocated, unless you have barely any data on your Pool.
If RAM is an issue, your ARC hit ratio will be very low and at that point you want to add more RAM to the system if there is room for it.