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Go Back  dBforums > Database Server Software > DB2 > Size of DB2 Schema

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  #1 (permalink)  
Old 09-21-10, 09:05
DB_N00b DB_N00b is offline
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Size of DB2 Schema
Does anyone know how i can find out the size of my db2 schema?
thanks in advance

DB_N00b
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Old 09-21-10, 09:23
db2girl db2girl is offline
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You can check the tablespace size if you store schemas in different tablespaces
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Old 09-21-10, 09:26
DB_N00b DB_N00b is offline
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Thats actually not what i going to do.

I want to see the size of an excisting db schema :-)
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Old 09-21-10, 09:31
db2girl db2girl is offline
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You can use get_dbsize_info if you have one schema or you can query the catalog
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Old 09-21-10, 09:32
DB_N00b DB_N00b is offline
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whats the command?
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Old 09-21-10, 09:39
DB_N00b DB_N00b is offline
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I have a link on the IBM Info Center, but its not working properly.

Quote:
Example 1: Get the database size and capacity using a default refresh window of 30 minutes. The database size and capacity will be recalculated when the cached data is older than 30 minutes.

CALL GET_DBSIZE_INFO(?, ?, ?, -1)
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Old 09-21-10, 09:41
DB_N00b DB_N00b is offline
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I have no idea what this means ...

can anyone help?
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Old 09-21-10, 10:08
ARWinner ARWinner is offline
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I posted something earlier that you might use:

Script Library

Your runstats need to be current.

Andy
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Old 09-22-10, 05:30
DB_N00b DB_N00b is offline
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Sorry, but your scripts dont help me much.
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Old 09-22-10, 08:48
ARWinner ARWinner is offline
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Why did they not help you?

Andy
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Old 04-27-11, 09:31
DB_N00b DB_N00b is offline
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I dont know which one to use. All i want is to get the size of one schema i have in my database
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Old 04-27-11, 10:58
MarkhamDBA MarkhamDBA is offline
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Quote:
Originally Posted by DB_N00b View Post
I dont know which one to use. All i want is to get the size of one schema i have in my database
i don't think 'schema size' makes sense - schema is not a physical object. what makes sense is the size of all objects under certain schema. then you probably need to write a query to find all objects (tables, indexes) and calculate and sum their sizes to get total size.
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Old 04-27-11, 17:59
DebianDog DebianDog is offline
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simple
Code:
db2 "select sum(NPAGES)*4096 from syscat.tables where TABSCHEMA = 'MYSCHEMA'" and type = 'T'
Will get you close...if you have 4k pages that is

a DBA should make this table his or her best friend

Code:
db2 describe table syscat.tables
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Old 04-28-11, 06:08
n_i n_i is offline
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Quote:
Originally Posted by DebianDog View Post
Code:
db2 "select sum(NPAGES)*4096 from syscat.tables
Does not account for the size of indexes; are they part of a schema?
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Old 04-28-11, 08:25
DebianDog DebianDog is offline
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Quote:
Originally Posted by n_i View Post
Does not account for the size of indexes; are they part of a schema?
Oh right DUH like it would be that easy. Yes you would have to multiply NLEAF times page size then add the two together. What I get for hurrying.

You may be able to modify this query to suit your needs as it will find the index size for 1 table.

Code:
SELECT DEC(( FLOAT(( Sum(CAST(nleaf AS BIGINT)) * x.pagesize )) /
                    FLOAT(( 1024 * 1024 )) ), 8, 3) "Index_size_in_MBs"
FROM   syscat.indexes i,
       (SELECT s.tabschema,
               s.tabname,
               st.pagesize
        FROM   syscat.tables s,
               sysibm.systablespaces st
        WHERE  s.index_tbspace = st.tbspace) AS x
WHERE  x.tabname = i.tabname
       AND i.tabname = 'YOUR_TABLE_NAME'
GROUP  BY x.pagesize
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