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So far PostgreSQL is the only vendor to have announced a live product with this specific feature, in PostgreSQL 9.5. [ 3 ] [ 4 ] Other vendors have described some similar features, [ 2 ] including Oracle , [ 5 ] [ 6 ] Netezza 'zone maps', [ 7 ] Infobright 'data packs', [ 8 ] MonetDB [ 9 ] and Apache Hive with ORC/Parquet.
The pgBadger PostgreSQL log analyzer generates detailed reports from a PostgreSQL log file. [107] pgDevOps pgDevOps is a suite of web tools to install & manage multiple PostgreSQL versions, extensions, and community components, develop SQL queries, monitor running databases and find performance problems. [108] Adminer
Note (7): When using a page size of 32 KB, and when BLOB/CLOB data is stored in the database file. Note (8): Java array size limit of 2,147,483,648 (2 31 ) objects per array applies. This limit applies to number of characters in names, rows per table, columns per table, and characters per CHAR / VARCHAR .
File size is a measure of how much data a computer file contains or how much storage space it is allocated. Typically, file size is expressed in units based on byte. A large value is often expressed with a metric prefix (as in megabyte and gigabyte) or a binary prefix (as in mebibyte and gibibyte). [1]
Block size (fixed size, or maximum size for files of variable-length records) (binary) 88: 2: Record length (fixed size or maximum length for variable length records) (binary) 90: 1: Key length if this file has recorded record keys. (binary) 91: 2: Position of the key (if any) in the record relative to zero. (binary) 93: 1
File system: FlexWiki: David Ornstein September 2004: 2.1.0.274 2008-10-20 CPL: Yes ASP.NET, C#: File system, Microsoft SQL Server: Foswiki: Foswiki community December 2008: 2.1.8 [11] 2023-08-06: TWiki GPL: Yes Yes Perl: Flat-file database, RCS, or a variety of databases as plugins [12] Gollum: Tom Preston-Werner, Rick Olson, Dawa Ometto, Bart ...
Files with hard links in multiple directories have multiple reference items, one for each parent directory. Files with multiple hard links in the same directory pack all of the links' filenames into the same reference item. This was a design flaw that limited the number of same-directory hard links to however many could fit in a single tree block.
Extent-based file systems can also eliminate most of the metadata overhead of large files that would traditionally be taken up by the block-allocation tree. But because the savings are small compared to the amount of stored data (for all file sizes in general) but make up a large portion of the metadata (for large files), the overall benefits ...