Quantcast
Viewing all articles
Browse latest Browse all 2539

Re: DB migration Oracle -> MaxDB why increased db size?

Hi Deepak,

 

Thank you for this link. I very appriciate your effort.

A little more clarification would be good for me.

 

So according to the explanation of MaxDb documentation the reason why I have variable size growth on various tables is because when a particular table has CHAR, VARCHAR or LOB fields, the Oracle stores these types of data as 1 byte length data and MaxDB stores it as 2 bytes length data, so the table size growth depends on the number of CHAR, VARCHAR or LOB data type fileds and their length definied in the table. So as these fields are varying between tables the table size growth is varying too.

 

In practice I try to investigate the existence of this behaviour, so I picked the table


Tabname:                FPLAYOUTT

MaxDB size (Kb):    500136

Oracle size (Kb):     320,512

Growth rate:            156043%

 

In my Example I checked "Table length" in SE11, and both in ORA and MaxDB all the sizes are identical.

 

More interestingly if I check the Database Object in SE11

MaxDB:

 

Image may be NSFW.
Clik here to view.
FPLAYOUTT_maxdb.png

 

Oracle:

Image may be NSFW.
Clik here to view.
FPLAYOUTT_oracle.png

I my understanding these pictures show the opposite!

 

Where could I check this storage difference in numbers?

 

Best Regards,

Robert


Viewing all articles
Browse latest Browse all 2539

Trending Articles