Thank you very much!
/** Disk-Space Utilization Report For junk.db3
Page size in bytes................................ 1024
Pages in the whole file (measured)................ 27606264
Pages in the whole file (calculated).............. 24264026
Pages that store data............................. 24261882 87.9%
Pages on the freelist (per header)................ 2144 0.008%
Pages on the freelist (calculated)................ 3344382 12.1%
Pages of auto-vacuum overhead..................... 0 0.0%
Number of tables in the database.................. 5
Number of indices................................. 1
Number of defined indices......................... 1
Number of implied indices......................... 0
Size of the file in bytes......................... 28268814336
Bytes of user payload stored...................... 18312217251 64.8%
*** Page counts for all tables with their indices
*****************************
MYTABLE........................................... 24260587 87.9%
PARTS............................................. 1292 0.005%
QUERY............................................. 1 0.0%
SQLITE_MASTER..................................... 1 0.0%
SQLITE_SEQUENCE................................... 1 0.0%
*** Page counts for all tables and indices separately
*************************
MYTABLE........................................... 24260587 87.9%
PARTS............................................. 1116 0.004%
MANUF............................................. 176 0.0%
QUERY............................................. 1 0.0%
SQLITE_MASTER..................................... 1 0.0%
SQLITE_SEQUENCE................................... 1 0.0%
*** All tables and indices
****************************************************
Percentage of total database...................... 87.9%
Number of entries................................. 704297145
Bytes of storage consumed......................... 24844167168
Bytes of payload.................................. 18312362684 73.7%
Average payload per entry......................... 26.00
Average unused bytes per entry.................... 1.02
Average fanout.................................... 84.00
Maximum payload per entry......................... 426
Entries that use overflow......................... 0 0.0%
Index pages used.................................. 285997
Primary pages used................................ 23975885
Overflow pages used............................... 0
Total pages used.................................. 24261882
Unused bytes on index pages....................... 34713267 11.9%
Unused bytes on primary pages..................... 683387034 2.8%
Unused bytes on overflow pages.................... 0
Unused bytes on all pages......................... 718100301 2.9%
*** All tables
****************************************************************
Percentage of total database...................... 87.9%
Number of entries................................. 704287145
Bytes of storage consumed......................... 24843986944
Bytes of payload.................................. 18312217804 73.7%
Average payload per entry......................... 26.00
Average unused bytes per entry.................... 1.02
Average fanout.................................... 84.00
Maximum payload per entry......................... 426
Entries that use overflow......................... 0 0.0%
Index pages used.................................. 285997
Primary pages used................................ 23975709
Overflow pages used............................... 0
Total pages used.................................. 24261706
Unused bytes on index pages....................... 34713267 11.9%
Unused bytes on primary pages..................... 683383798 2.8%
Unused bytes on overflow pages.................... 0
Unused bytes on all pages......................... 718097065 2.9%
*** All indices
***************************************************************
Percentage of total database...................... 0.0%
Number of entries................................. 10000
Bytes of storage consumed......................... 180224
Bytes of payload.................................. 144880 80.4%
Average payload per entry......................... 14.49
Average unused bytes per entry.................... 0.32
Maximum payload per entry......................... 35
Entries that use overflow......................... 0 0.0%
Primary pages used................................ 176
Overflow pages used............................... 0
Total pages used.................................. 176
Unused bytes on primary pages..................... 3236 1.8%
Unused bytes on overflow pages.................... 0
Unused bytes on all pages......................... 3236 1.8%
*** Table MYTABLE
*************************************************************
Percentage of total database...................... 87.9%
Number of entries................................. 704277138
Bytes of storage consumed......................... 24842841088
Bytes of payload.................................. 18311205588 73.7%
Average payload per entry......................... 26.00
Average unused bytes per entry.................... 1.02
Average fanout.................................... 84.00
Non-sequential pages.............................. 12 0.0%
Maximum payload per entry......................... 26
Entries that use overflow......................... 0 0.0%
Index pages used.................................. 285986
Primary pages used................................ 23974601
Overflow pages used............................... 0
Total pages used.................................. 24260587
Unused bytes on index pages....................... 34710955 11.9%
Unused bytes on primary pages..................... 683321040 2.8%
Unused bytes on overflow pages.................... 0
Unused bytes on all pages......................... 718031995 2.9%
*** Table QUERY
***************************************************************
Percentage of total database...................... 0.0%
Number of entries................................. 1
Bytes of storage consumed......................... 1024
Bytes of payload.................................. 426 41.6%
Average payload per entry......................... 426.00
Average unused bytes per entry.................... 585.00
Maximum payload per entry......................... 426
Entries that use overflow......................... 0 0.0%
Primary pages used................................ 1
Overflow pages used............................... 0
Total pages used.................................. 1
Unused bytes on primary pages..................... 585 57.1%
Unused bytes on overflow pages.................... 0
Unused bytes on all pages......................... 585 57.1%
*** Table PARTS and all its indices
*******************************************
Percentage of total database...................... 0.005%
Number of entries................................. 20000
Bytes of storage consumed......................... 1323008
Bytes of payload.................................. 1156117 87.4%
Average payload per entry......................... 57.81
Average unused bytes per entry.................... 3.32
Average fanout.................................... 101.00
Maximum payload per entry......................... 156
Entries that use overflow......................... 0 0.0%
Index pages used.................................. 11
Primary pages used................................ 1281
Overflow pages used............................... 0
Total pages used.................................. 1292
Unused bytes on index pages....................... 2312 20.5%
Unused bytes on primary pages..................... 64056 4.9%
Unused bytes on overflow pages.................... 0
Unused bytes on all pages......................... 66368 5.0%
*** Table PARTS w/o any indices
***********************************************
Percentage of total database...................... 0.004%
Number of entries................................. 10000
Bytes of storage consumed......................... 1142784
Bytes of payload.................................. 1011237 88.5%
Average payload per entry......................... 101.12
Average unused bytes per entry.................... 6.31
Average fanout.................................... 101.00
Non-sequential pages.............................. 1 0.090%
Maximum payload per entry......................... 156
Entries that use overflow......................... 0 0.0%
Index pages used.................................. 11
Primary pages used................................ 1105
Overflow pages used............................... 0
Total pages used.................................. 1116
Unused bytes on index pages....................... 2312 20.5%
Unused bytes on primary pages..................... 60820 5.4%
Unused bytes on overflow pages.................... 0
Unused bytes on all pages......................... 63132 5.5%
*** Index MANUF of table PARTS
************************************************
Percentage of total database...................... 0.0%
Number of entries................................. 10000
Bytes of storage consumed......................... 180224
Bytes of payload.................................. 144880 80.4%
Average payload per entry......................... 14.49
Average unused bytes per entry.................... 0.32
Non-sequential pages.............................. 1 0.57%
Maximum payload per entry......................... 35
Entries that use overflow......................... 0 0.0%
Primary pages used................................ 176
Overflow pages used............................... 0
Total pages used.................................. 176
Unused bytes on primary pages..................... 3236 1.8%
Unused bytes on overflow pages.................... 0
Unused bytes on all pages......................... 3236 1.8%
*** Table SQLITE_MASTER
*******************************************************
Percentage of total database...................... 0.0%
Number of entries................................. 6
Bytes of storage consumed......................... 1024
Bytes of payload.................................. 553 54.0%
Average payload per entry......................... 92.17
Average unused bytes per entry.................... 56.17
Maximum payload per entry......................... 225
Entries that use overflow......................... 0 0.0%
Primary pages used................................ 1
Overflow pages used............................... 0
Total pages used.................................. 1
Unused bytes on primary pages..................... 337 32.9%
Unused bytes on overflow pages.................... 0
Unused bytes on all pages......................... 337 32.9%
*** Table SQLITE_SEQUENCE
*****************************************************
Percentage of total database...................... 0.0%
Number of entries................................. 0
Bytes of storage consumed......................... 1024
Bytes of payload.................................. 0 0.0%
Average payload per entry......................... 0.0
Average unused bytes per entry.................... 0.0
Maximum payload per entry......................... 0
Entries that use overflow......................... 0
Primary pages used................................ 1
Overflow pages used............................... 0
Total pages used.................................. 1
Unused bytes on primary pages..................... 1016 99.22%
Unused bytes on overflow pages.................... 0
Unused bytes on all pages......................... 1016 99.22%
*** Definitions
***************************************************************
Page size in bytes
The number of bytes in a single page of the database file.
Usually 1024.
Number of pages in the whole file
The number of 1024-byte pages that go into forming the complete
database
Pages that store data
The number of pages that store data, either as primary B*Tree pages or
as overflow pages. The number at the right is the data pages divided by
the total number of pages in the file.
Pages on the freelist
The number of pages that are not currently in use but are reserved for
future use. The percentage at the right is the number of freelist pages
divided by the total number of pages in the file.
Pages of auto-vacuum overhead
The number of pages that store data used by the database to facilitate
auto-vacuum. This is zero for databases that do not support auto-vacuum.
Number of tables in the database
The number of tables in the database, including the SQLITE_MASTER table
used to store schema information.
Number of indices
The total number of indices in the database.
Number of defined indices
The number of indices created using an explicit CREATE INDEX statement.
Number of implied indices
The number of indices used to implement PRIMARY KEY or UNIQUE
constraints
on tables.
Size of the file in bytes
The total amount of disk space used by the entire database files.
Bytes of user payload stored
The total number of bytes of user payload stored in the database. The
schema information in the SQLITE_MASTER table is not counted when
computing this number. The percentage at the right shows the payload
divided by the total file size.
Percentage of total database
The amount of the complete database file that is devoted to storing
information described by this category.
Number of entries
The total number of B-Tree key/value pairs stored under this category.
Bytes of storage consumed
The total amount of disk space required to store all B-Tree entries
under this category. The is the total number of pages used times
the pages size.
Bytes of payload
The amount of payload stored under this category. Payload is the data
part of table entries and the key part of index entries. The percentage
at the right is the bytes of payload divided by the bytes of storage
consumed.
Average payload per entry
The average amount of payload on each entry. This is just the bytes of
payload divided by the number of entries.
Average unused bytes per entry
The average amount of free space remaining on all pages under this
category on a per-entry basis. This is the number of unused bytes on
all pages divided by the number of entries.
Non-sequential pages
The number of pages in the table or index that are out of sequence.
Many filesystems are optimized for sequential file access so a small
number of non-sequential pages might result in faster queries,
especially for larger database files that do not fit in the disk cache.
Note that after running VACUUM, the root page of each table or index is
at the beginning of the database file and all other pages are in a
separate part of the database file, resulting in a single non-
sequential page.
Maximum payload per entry
The largest payload size of any entry.
Entries that use overflow
The number of entries that user one or more overflow pages.
Total pages used
This is the number of pages used to hold all information in the current
category. This is the sum of index, primary, and overflow pages.
Index pages used
This is the number of pages in a table B-tree that hold only key (rowid)
information and no data.
Primary pages used
This is the number of B-tree pages that hold both key and data.
Overflow pages used
The total number of overflow pages used for this category.
Unused bytes on index pages
The total number of bytes of unused space on all index pages. The
percentage at the right is the number of unused bytes divided by the
total number of bytes on index pages.
Unused bytes on primary pages
The total number of bytes of unused space on all primary pages. The
percentage at the right is the number of unused bytes divided by the
total number of bytes on primary pages.
Unused bytes on overflow pages
The total number of bytes of unused space on all overflow pages. The
percentage at the right is the number of unused bytes divided by the
total number of bytes on overflow pages.
Unused bytes on all pages
The total number of bytes of unused space on all primary and overflow
pages. The percentage at the right is the number of unused bytes
divided by the total number of bytes.
*******************************************************************************
The entire text of this report can be sourced into any SQL database
engine for further analysis. All of the text above is an SQL comment.
The data used to generate this report follows:
*/
BEGIN;
CREATE TABLE space_used(
name clob, -- Name of a table or index in the database file
tblname clob, -- Name of associated table
is_index boolean, -- TRUE if it is an index, false for a table
nentry int, -- Number of entries in the BTree
leaf_entries int, -- Number of leaf entries
payload int, -- Total amount of data stored in this table or index
ovfl_payload int, -- Total amount of data stored on overflow pages
ovfl_cnt int, -- Number of entries that use overflow
mx_payload int, -- Maximum payload size
int_pages int, -- Number of interior pages used
leaf_pages int, -- Number of leaf pages used
ovfl_pages int, -- Number of overflow pages used
int_unused int, -- Number of unused bytes on interior pages
leaf_unused int, -- Number of unused bytes on primary pages
ovfl_unused int, -- Number of unused bytes on overflow pages
gap_cnt int, -- Number of gaps in the page layout
compressed_size int -- Total bytes stored on disk
);
INSERT INTO space_used
VALUES('sqlite_master','sqlite_master',0,6,6,553,0,0,225,0,1,0,0,337,0,0,1024);
INSERT INTO space_used
VALUES('parts','parts',0,11104,10000,1011237,0,0,156,11,1105,0,2312,60820,0,1,1142784);
INSERT INTO space_used
VALUES('sqlite_sequence','sqlite_sequence',0,0,0,0,0,0,0,0,1,0,0,1016,0,0,1024);
INSERT INTO space_used
VALUES('Query','Query',0,1,1,426,0,0,426,0,1,0,0,585,0,0,1024);
INSERT INTO space_used
VALUES('MANUF','parts',1,10000,10000,144880,0,0,35,0,176,0,0,3236,0,1,180224);
INSERT INTO space_used
VALUES('MyTable','MyTable',0,728251738,704277138,18311205588,0,0,26,285986,23974601,0,34710955,683321040,0,12,24842841088);
COMMIT;
-----
May
--
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