If your tablespace is DMS, use this command "list tablespaces show detail", else, view the space in the folder in win.
For explample:
SMS:
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db2 => list tablespaces show detail
Tablespaces for Current Database
Tablespace ID = 0
Name = SYSCATSPACE
Type = System managed space
Contents = Any data
State = 0x0000
Detailed explanation:
Normal
Total pages = 11661
Useable pages = 11661
Used pages = 11661
Free pages = Not applicable
High water mark (pages) = Not applicable
Page size (bytes) = 4096
Extent size (pages) = 32
Prefetch size (pages) = 16
Number of containers = 1
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for DMS:
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Tablespace ID = 5
Name = TBATTRIB
Type = Database managed space
Contents = Any data
State = 0x0000
Detailed explanation:
Normal
Total pages = 7680000
Useable pages = 7679920
Used pages = 295248
Free pages = 7384672
High water mark (pages) = 6144016
Page size (bytes) = 4096
Extent size (pages) = 16
Prefetch size (pages) = 8
Number of containers = 5
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Abel.