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How to set the initial size when creating a table in mysqlInnoDB bitsCN.com When InnoDB is writing intensive, B-Tree extension also brings about data file extension. However, InnoDB data file extension requires mutex to protect data files, this will lead to fluctuations. Ding Qi's blog illustrates this problem:When InnoDB under heavy write workload, datafiles will extend quickly, because of B-Tree allocate
Estimate the table size The following steps can be used to estimate the amount of space required for storing data in the table. Specify the number of rows in the table: Number of rows in the table = num_rows If there are fixed-length and variable-length columns in th
When InnoDB is writing intensive, B-Tree extension also brings about data file extension. However, InnoDB data file extension requires mutex to protect data files, this will lead to fluctuations. Ding Qi's blog illustrates this problem:When InnoDB under heavy write workload, datafiles will extend quickly, because of B-Tree allocate new pages. but InnoDB need to use mutex to protect datafile, so it will cause performance jitter. xiaobin Lin said this in his blog:The solution is also very simple,
, sys.sm$ts_used B, Sys.sm$ts_free cWHERE A.tablespace_name = B.tablespace_nameand a.tablespace_name = C.tablespace_name;--7, viewing Database library objectsSELECT owner, object_type, status, COUNT (*) count#From All_objectsGROUP by Owner, object_type, status;--8, viewing the version of the databaseSELECT versionFrom Product_component_versionWHERE substr (product, 1, 6) = ' Oracle ';--9, viewing the date the database was created and how it was archivedSELECT created, Log_mode, log_mode from V$d
Tags: Oracle database table Space sizeTo see the size of the Oracle database table space, you need to increase the table space data files, in database Management , the lack of disk space is a problem that DBAs encounter, the problem is more common.--1, viewing the percentage of t
Tags: create MYSQ 2TB SQL FAT32 storage engine instead of size files byteMySQL 3.22 limits the table size to 4GB. Since the MyISAM storage engine was used in MySQL 3.23, the maximum table size was increased to 65536TB (2567 – 1 bytes). Due to the larger
--1. View the name and size of the table spaceSELECTT.tablespace_name,round(SUM(bytes/(1024x768 * 1024x768)),0) Ts_size fromdba_tablespaces T, dba_data_files DWHERET.tablespace_name=D.tablespace_nameGROUP byT.tablespace_name;--2. View the table space physical file name and sizeSELECTTablespace_name,file_id, file_name, round(bytes/(1024x768 * 1024x768),0) Total_s
Tags: view database, table sizeTo know the size of each database, proceed as follows:1. Access to the INFORMATION_SCHEMA database (information on other databases)Use INFORMATION_SCHEMA;2, query the size of all data:Select Concat (Round (sum (data_length/1024/1024), 2), ' MB ') as data from tables;3. View the size of th
To know the size of each database, proceed as follows:1. Access to the INFORMATION_SCHEMA database (information on other databases)Use INFORMATION_SCHEMA;2, query the size of all data:Select Concat (Round (sum (data_length/1024/1024), 2), ' MB ') as data from tables;3. View the size of the specified database:Like looking at the
Label:Oracle modifies table space sizeAfter the database was established using ORACLE10G, some data was imported into the database and an error occurred the next day when the data table was imported to the database:It's a lot of data. The reason why the data could not continue to be imported was found to be an Oracle tablespace limitation. If the database is not set up,Oracle's default tablespace
Label: SQL2000 Viewing the size of a table Tags: sqlsql server database report Tableinsert 2011-06-08 11:47 4013 People read comments (0) favorite reports SQL2000 viewing the size of a table This article from: http://blog.csdn.net/tianshikuqi8/archive/2011/01/04/6114682.aspx SQL2000 viewing a table's
From: http://hi.baidu.com/zhuhailangke/blog/item/5b7b0c1392fd7b47f919b86f.html Today, when you create a database in the query analyzer, a warning is displayed: The Table XXX has been created, but its maximum size (8926) exceeds the maximum number of bytes (8060) in each row ). If the length of the result row exceeds 8060 bytes, insert or update of the row in this tabl
after the database was established using ORACLE10G, some data was imported into the database and an error occurred the next day when the data table was imported to the database:It's a lot of data. The reason why the data could not continue to be imported was found to be an Oracle tablespace limitation. If the database is not set up,Oracle's default tablespace size is 400M, and when the amount of data in the
The previous section left a tail and did not show how to obtain the table size. In fact, the calculation of table size should be carried out when reading the Excel worksheet data, and the maximum column number and row number of cells containing data should also be calculated. The specific implementation is: For (int r
Turn from: http://www.111cn.net/database/mysql/53890.htm http://blog.csdn.net/atec2000/article/details/7041352 Tables for the INFORMATION_SCHEMA library, the main fields are: Table_schema: Database nameTABLE_NAME: Table nameENGINE: the storage engine usedTables_rows: Number of recordsData_length: Data size Index_length: Index size To know the
Tags: see the size of the library and table under MySQL instance 1.mysql View instance, the size of each library Selecttable_schema,concat (truncate (SUM (data_length)/1024/1024,2), ' MB ') asdata_size, concat (Truncate (SUM (index_length)/1024/1024,2), ' MB ') asindex_size from information_schema.tables Groupbytable_schema orderbydata_lengthdesc; 2.mysql V
Statistics on the size of SQL Server user data tables (including the total number of records and space usage) in SQL Server, a simple combination of sp_spaceused and sp_msforeachtable stored procedures, you can easily calculate the size of the user data table, this includes the total number of records and space usage. It is very practical and has been tested in b
;NBSP;NBSP;NBSP;NBSP;NBSP;TELE_Q3)) 46ORDERBY product,country47/explained.elapsed:00:00:00.37Sql>2. Use the following SQL to query the size of the related table:Sql> Col segment_name for A20Select owner, Segment_name,segment_type, sum (bytes/1024/1024) "Size (Mb)"From Dba_segmentswhere owner in (select/*+ no_unnest */Object_owner from plan_table)and Segment_name in (select/*+ no_unnest */object_name from pl
When importing data to the Orale database ORA-01658: Unable to create a INITIAL area error for the segment in table Space XXX. Oracle I initialize the size of 200M when creating a table space, when the amount of data in the database reaches this value, and then import the data into the database will be an error. The workaround is to extend the
Each MySQL has a library information_schema, which has a table tables stores information about all database tables, so you can see the database size and table size from this tableQuerying database sizeSelectConcatround((sum(data_length)+sum(Index_length))/1024x768/1024x768/1024x768,2),'GB') asData fromInformation_schem
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