Monyog Disk Space Mom Working

[anup_fc]

How does MONYog MOM calculates Disk space free for all the mounted partitions.

 

I am more interested towards  MONyog.System.Disk.sys_disk_free_innodb MOM .

 

How does MOnyog calcualtes ? how does monyog system MOM finds out the current Data directory or Innodb directory for Disk monitoring ?

 

How can i change those function and what will  MONyog.System.Disk.sys_disk_free_innodb function will return ?

 

[Ankush]

MONyog calculates the volume usage by executing ‘df’ command on the target machine. MONyog gets the information about data directory(and the volume where it resides) from 3 different system variables: basedir, tmpdir and innodb_data_home_dir.

MONyog.System.Disk.sys_disk_free_innodb returns the amount of free space which is left on the volume where InnoDB data resides.

For more info on other MOMs related to disk monitoring, please refer: http://monyogkb.webyog.com/article/108-monyog-object-model 

You can use the other MOMs to create a new monitor or change the behaviour of an existing monitor but you cannot add any extra MOM.

[anup_fc]

OK our Innodb data resides on some other mounts not on base dir location and our innodb-data-home_dir is empty .In this case it should look for datadir variable.

Does monyog checks datadir variable to find out the right data directory? because its always innodb_data_home_dir always in datadir .

[Author]

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