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Questions related to tablespace, diskspace, reclaim lob space

Posted on 2011-09-29
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How do we query maximum allowed diskspace from the dictionary tables?
Normally tbspace is defined as auto extend, will  TB1_LT which is almost full auto extend..?
is there a max that is define per tbspace..? when it extends will it use the space available in undo..? is there a way to find out how are the tbspace defined in the database..?
how to reclaim log space after data is deleted..?
we have 10gr2..
This is what one of my queries brings up..
"Tabspace"      "Size (MB)"      "Free (MB)"      "% Free"      "% Used"
TOOLS      5      5      90      10
UNDO_01      500      446      89      11
TB4_WT      2      2      84      16
TB9_WX      2      1      73      27
TB5_ST      5      3      65      35
USERS      5      2      30      70
SYSAUX      410      92      22      78
TB1_LT      38,828            1      
TB2_MT      358            1      
TB8_LX         2,326            1      
TB7_MX      284            1      
TB3_ST      14            1      
SYSTEM      360      2      1      99
TB6_SX      5            1      
TEMP      2,000      0      0      100


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Question by:Rao_S
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slightwv (䄆 Netminder) earned 500 total points
ID: 36817340
>>How do we query maximum allowed diskspace from the dictionary tables?

This is usually driven by the amount of available disk space on the system.

>>will  TB1_LT which is almost full auto extend..?

If set to autoexetnd, whenever Oracle cannot allocate a new extent, the datafile will autoextend.

>>is there a max that is define per tbspace..?

There can be depending on your individual system settings but that is a pretty detailed question.

>>when it extends will it use the space available in undo..?

Regular datafiles and UNDO aren't really that related.

>>is there a way to find out how are the tbspace defined in the database..?

I do not understand this question.

>>how to reclaim log space after data is deleted..?

Define 'reclaim'.  If you mean make the datafile smaller, you need to resize the datafile.  Space from deleted rows is available for future rows to use so you should not need to 'reclaim' it.
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Author Closing Comment

by:Rao_S
ID: 36950739
thank you.... i searched and found several quries on line...
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