I'm told that show table status
is useful in finding the size of a database, but I get an unreadable mess. Is there any way to alter this command to get less information, or is there another way to find the size of a database or table?
5 Answers
The two fields you want are.
Data_length
This is the size of the data within the table in bytes.
Index_length
This is the size of the table's index in bytes.
You can limit the output to one table with a database with.
SHOW TABLE STATUS LIKE 'tablename';
You can't remove the other columns from the output. You might find the output easier to read from a console by printing the output rows vertically. Just replace the ";
" for "\G
".
I have a rather wild set of queries that would address this nicely. I wrote these about 2 years ago and they work just great. I still use them for reporting to clients.
Query to Give You Database Size Grouped By Storage Engine in MB
SELECT IFNULL(B.engine,'Total') "Storage Engine",
CONCAT(LPAD(REPLACE(FORMAT(B.DSize/POWER(1024,pw),3),',',''),17,' '),' ',SUBSTR('KMGTP',pw+1,1),'B') "Data Size",
CONCAT(LPAD(REPLACE(FORMAT(B.ISize/POWER(1024,pw),3),',',''),17,' '),' ',SUBSTR(' KMGTP',pw+1,1),'B') "Index Size",
CONCAT(LPAD(REPLACE(FORMAT(B.TSize/POWER(1024,pw),3),',',''),17,' '),' ',SUBSTR(' KMGTP',pw+1,1),'B') "Table Size"
FROM (
SELECT engine,SUM(data_length) DSize,
SUM(index_length) ISize,
SUM(data_length+index_length) TSize
FROM information_schema.tables
WHERE table_schema NOT IN ('mysql','information_schema','performance_schema')
AND engine IS NOT NULL
GROUP BY engine WITH ROLLUP) B,
(SELECT 2 pw) A
ORDER BY TSize;
Query to Give You Database Size Grouped By Database in MB
SELECT DBName,
CONCAT(LPAD(FORMAT(SDSize/POWER(1024,pw),3),17,' '),' ',SUBSTR(' KMGTP',pw+1,1),'B') "Data Size",
CONCAT(LPAD(FORMAT(SXSize/POWER(1024,pw),3),17,' '),' ',SUBSTR(' KMGTP',pw+1,1),'B') "Index Size",
CONCAT(LPAD(FORMAT(STSize/POWER(1024,pw),3),17,' '),' ',SUBSTR(' KMGTP',pw+1,1),'B') "Total Size"
FROM (
SELECT IFNULL(DB,'All Databases') DBName,
SUM(DSize) SDSize,
SUM(XSize) SXSize,
SUM(TSize) STSize
FROM (
SELECT table_schema DB,
data_length DSize,
index_length XSize,
data_length+index_length TSize
FROM information_schema.tables
WHERE table_schema NOT IN ('mysql','information_schema','performance_schema')) AAA
GROUP BY DB WITH ROLLUP
) AA,
(SELECT 2 pw) BB
ORDER BY (SDSize+SXSize);
Query to Give You Database Size Grouped By Database and Storage Engine in MB
SELECT Statistic,DataSize "Data Size",
IndexSize "Index Size",
TableSize "Table Size"
FROM (
SELECT IF(ISNULL(table_schema)=1,10,0) schema_score,
IF(ISNULL(engine)=1,10,0) engine_score,
IF(ISNULL(table_schema)=1,'ZZZZZZZZZZZZZZZZ',table_schema) schemaname,
IF(ISNULL(B.table_schema)+ISNULL(B.engine)=2,
"Storage for All Databases",
IF(ISNULL(B.table_schema)+ISNULL(B.engine)=1,
CONCAT("Storage for ",B.table_schema),
CONCAT(B.engine," Tables for ",B.table_schema))) Statistic,
CONCAT(LPAD(REPLACE(FORMAT(B.DSize/POWER(1024,pw),3),',',''),17,' '),' ',SUBSTR(' KMGTP',pw+1,1),'B') DataSize,
CONCAT(LPAD(REPLACE(FORMAT(B.ISize/POWER(1024,pw),3),',',''),17,' '),' ',SUBSTR(' KMGTP',pw+1,1),'B') IndexSize,
CONCAT(LPAD(REPLACE(FORMAT(B.TSize/POWER(1024,pw),3),',',''),17,' '),' ',SUBSTR(' KMGTP',pw+1,1),'B') TableSize
FROM (SELECT table_schema,engine,
SUM(data_length) DSize,
SUM(index_length) ISize,
SUM(data_length+index_length) TSize
FROM information_schema.tables
WHERE table_schema NOT IN ('mysql','information_schema','performance_schema')
AND engine IS NOT NULL
GROUP BY table_schema,engine WITH ROLLUP) B,
(SELECT 2 pw) A) AA
ORDER BY schemaname, schema_score,engine_score;
All three queries have one thing in common: A simple SELECT query (SELECT 2 pw).
The pw stands for power, the exponent used against the number 1024. You can adjust the query to give you Database Sizes with different units:
(SELECT 0 pw) --reports the Database Size in Bytes
(SELECT 1 pw) --reports the Database Size in Kilobytes
(SELECT 2 pw) --reports the Database Size in Megabytes
(SELECT 3 pw) --reports the Database Size in Gigabytes
(SELECT 4 pw) --reports the Database Size in Terabytes
(SELECT 5 pw) --reports the Database Size in Petabytes (email me if you reach this size)
Give Them a Try !!!
-
-
I have a new-and-improved algorithms in my DBA StackExchange post (dba.stackexchange.com/a/8662/877). I added them 2015-01-16 14:46 EST. It handles all units (KB,MB,GB) without specifying it beforehand. Feb 5, 2015 at 20:26
Found a script should do what you want -
http://www.modwest.com/help/kb6-199.html
<?
mysql_connect("db.modwest.com", "username", "password");
mysql_select_db("yourdb");
$result = mysql_query("show table status");
$size = 0;
$out = "";
while($row = mysql_fetch_array($result)) {
$size += $row["Data_length"];
$out .= $row["Name"] .": ".
round(($row["Data_length"]/1024)/1024, 2) ."<br>\n";
}
$size = round(($size/1024)/1024, 1);
echo $out ."<br>\n";
echo "Total MySQL db size: $size";
?>
If you're looking for the actual size the database takes up on disk just find the size of the data/dbname directory.
Try this script:
SELECT
table_schema AS DataBase_Name
,ROUND(sum( data_length + index_length ) / 1024 /1024,1) AS OccupiedSize_inMB
,ROUND(sum( data_free )/ 1024 / 1024,1) AS FreeSpace_inMB
FROM information_schema.TABLES
GROUP BY table_schema ;