What can we know from this?

Question

from below scripts what can we know excately?from below how can we estimate whats going wrong regarding with respective to sga target.
please explain in detail
thanks for information.
NAME TYPE VALUE
sga_target big integer 5G
SQL> COLUMN size_for_estimate FORMAT 999,999,999,999 heading 'Cache Size
SQL> COLUMN buffers_for_estimate FORMAT 999,999,999 heading 'Buffers'
SQL> COLUMN estd_physical_read_factor FORMAT 999.90 heading 'Estd Phys|Read Facto
SQL> COLUMN estd_physical_reads FORMAT 999,999,999,999 heading 'Estd Phys|
SQL> SELECT size_for_estimate,
2 buffers_for_estimate,
3 estd_physical_read_factor,
4 estd_physical_reads
5 FROM v$db_cache_advice
6 WHERE name = 'DEFAULT'
7 AND block_size = (SELECT value
8 FROM v$parameter
9 WHERE name = 'db_block_size')
10 AND advice_status = 'ON';
Estd Phys Estd Phys
Cache Size (MB) Buffers Read Factor Reads
352 42,218 1.09 203,774,132
704 84,436 1.06 198,077,770
1,056 126,654 1.04 194,382,190
1,408 168,872 1.03 192,169,280
1,760 211,090 1.02 190,732,171
2,112 253,308 1.01 189,687,243
2,464 295,526 1.01 188,870,261
2,816 337,744 1.01 188,196,644
3,168 379,962 1.00 187,623,095
3,520 422,180 1.00 187,118,508
Estd Phys Estd Phys
Cache Size (MB) Buffers Read Factor Reads
3,648 437,532 1.00 186,953,443
3,872 464,398 1.00 186,664,478
4,224 506,616 1.00 186,251,357
4,576 548,834 .99 185,872,631
4,928 591,052 .99 185,512,284
5,280 633,270 .99 185,151,621
5,632 675,488 .99 184,783,430
5,984 717,706 .99 184,388,802
6,336 759,924 .98 183,952,807
6,688 802,142 .98 183,446,475
Estd Phys Estd Phys
Cache Size (MB) Buffers Read Factor Reads
7,040 844,360 .98 182,847,361
21 rows selected.

Answer 1

Dear Sunny,
please use code tag to easily understand/read your query output.
refer the link how to use code tag
http://wikis.sun.com/display/Forums/Forums+FAQ
see:-Are there any useful formatting options not shown on the sidebar?
NAME TYPE VALUE
sga_target big integer 5G
SQL> COLUMN size_for_estimate FORMAT 999,999,999,999 heading 'Cache Size
SQL> COLUMN buffers_for_estimate FORMAT 999,999,999 heading 'Buffers'
SQL> COLUMN estd_physical_read_factor FORMAT 999.90 heading 'Estd Phys|Read Facto
SQL> COLUMN estd_physical_reads FORMAT 999,999,999,999 heading 'Estd Phys|
SQL> SELECT size_for_estimate,
2 buffers_for_estimate,
3 estd_physical_read_factor,
4 estd_physical_reads
5 FROM v$db_cache_advice
6 WHERE name = 'DEFAULT'
7 AND block_size = (SELECT value
8 FROM v$parameter
9 WHERE name = 'db_block_size')
10 AND advice_status = 'ON';
Estd Phys Estd Phys
Cache Size (MB) Buffers Read Factor Reads
352 42,218 1.09 203,774,132
704 84,436 1.06 198,077,770
1,056 126,654 1.04 194,382,190
1,408 168,872 1.03 192,169,280
1,760 211,090 1.02 190,732,171
2,112 253,308 1.01 189,687,243
2,464 295,526 1.01 188,870,261
2,816 337,744 1.01 188,196,644
3,168 379,962 1.00 187,623,095
3,520 422,180 1.00 187,118,508
Estd Phys Estd Phys
Cache Size (MB) Buffers Read Factor Reads
3,648 437,532 1.00 186,953,443
3,872 464,398 1.00 186,664,478
4,224 506,616 1.00 186,251,357
4,576 548,834 .99 185,872,631
4,928 591,052 .99 185,512,284
5,280 633,270 .99 185,151,621
5,632 675,488 .99 184,783,430
5,984 717,706 .99 184,388,802
6,336 759,924 .98 183,952,807
6,688 802,142 .98 183,446,475
Estd Phys Estd Phys
Cache Size (MB) Buffers Read Factor Reads
7,040 844,360 .98 182,847,361
21 rows selected.