How to: Extend meta data of a thin pool

Thin pool meta data often gets overflown. It is possible to extend the thin pool metadata then the default valut that was set while setting up the thin pool. metadata volume is hidden normally from lvs output. One trick is to use the following command:
lvs -a

This should show the meta data volume to be something like

[[email protected] ~]# lvs -a
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
[lvol0_pmspare] vg0 ewi------- 64.00m
tp0 vg0 twi-aotz-- 64.00g 0.81 0.87
[tp0_tdata] vg0 Twi-ao---- 64.00g
[tp0_tmeta] vg0 ewi-ao---- 64.00m

Here it is tp0_tmeta. Now you can extend the tp0_tmeta as like any other logical volume:
lvextend -L+128M /dev/vg0/tp0_tmeta

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