DB2表空间扩容
1 - Detect what tablespace has size issues
db2 list tablespaces show detail
2 - Check the percentage of use from the tablespace
db2 list tablespace containers for <tablespace_id> show detail
3 - Calculating the size of free space needed
Now you are able to calculate the percentage of use from the tablespace. To get this number, do (Used Pages / Useable Pages) * 100 and then with this percentage you can continue calculating how many pages you need to increase to obtain the acceptable amount of free pages.
4 - Verifying the filesystem and the free space
Continuing, now you should check the total amount of free space at the fileystem. Do this typing
df -k <tablespace.path>
And you'll be able to verify if it's enough space to extend the tablespace. Remember you can check the page size in the output of "db2 list tablespaces show detail" command.
5 - Extending the tablespace
Finally, after all checked, you can execute the command to extend the pages of that tablespace. Do this using:
db2 "alter tablespace <tablespace_name> extend (all <page_numbers>)"
This will extend the size of your tablespace. Be careful when using EXTEND ALL clause when the tablespace has more than one container; in cases where the tablespace has more than one container, divide the total number of pages you intent to increase by the number of total containers.
Example:
db2 alter "tablespace IBMDB2SAMPLEREL extend (all 1000)"
Alternatively, if it's not possible to extend the actual containers, a possibility is to add new containers to the tablespace. For that, you should enter the following command:
db2 "alter tablespace <tablespace_name> add (FILE '<new_container_file>' <size>)"
Where size can be in pages (only using the numbers you want), in KBytes (using a K following the number), in MBytes (using a M following the number) or in GBytes (using a G following the number). Also, please note to use single quotes around the name of the file you'll use as a new container.
注意：增加container会导致重新条带化