The various system tables — RDB$ and MON$ — and associated indices are created, and appropriate pages formatted and written to disc; • Every page in the database is formatted with a defined page type database file, or files, with enough space allocated to create all the system tables and indices. New pages will be added to the end of the database file(s) as and when the user creates new tables and/or indices total of 0xa1 pages (161 pages) for the system tables, indices and the various database overhead pages. 2.1. Single File Databases A single file Firebird database consists of a number of pages, each the

Contents 1 Chapter 1. Introduction Firebird uses a page cache to hold pages in memory. It is much quicker to retrieve pages from RAM than to go out onto the disc system and read them physically each up from hibernation and the cause was thought to be the time required to load back all the cache pages from disc before the first query (after hibernation) could be processed. The cause was confirmed Firebird Cache Everything in the database is organised as fixed sized pages of known structure - there are nine different types of pages. The page cache is the intermediate between the "working" parts of

name="url" value="${url}"/> 最近更新: 24 五月 2015 最近更新: 24 五月 2015 || 版本: 3.3.0 版本: 3.3.0 Save web pages as PDF manually or automatically with PDFmyURL 日志 日志 项目文档 项目文档 项目文档 项目文档 项目信息 项目信息 项目报表 项目报表 延迟加载的全局开 关。当开启时，所 有关联对象都会延 迟加载。 特定关联 关系中可通过设 置 fetchType 属性 来覆盖该项的开关 状态。 true | false false Save web pages as PDF manually or automatically with PDFmyURL aggressiveLazyLoading 当启用时，对任意 延迟属性的调用会 使带有延迟加载属 性的对象完整加 只会 自动映射没有定义 嵌套结果集映射的 结果集。 FULL 会 自动映射任意复杂 的结果集（无论是 否嵌套）。 NONE, PARTIAL, FULL PARTIAL Save web pages as PDF manually or automatically with PDFmyURL defaultExecutorType 配置默认的执行 器。SIMPLE 就是普 通的执行器； REUSE

������������������������������������������ SELECT user, groupArray(page) as pages, groupArray(timestamp) as timestamps, arrayEnumerate(pages) as index FROM (SELECT * FROM client_log_all ORDER BY timestamp) GROUP groupArray(page) as pages, groupArray(timestamp) as timestamps, arrayEnumerate(pages) as index, arrayFilter((i, p) -> (pages[i] = 'HomePage' AND pages[i+1]!= 'Detail'), index, pages) as level_1, // In pages array -> (pages[i] = 'HomePage' AND pages[i+1]= 'Detail' AND pages[i+2]!='Order'), index, pages) as level_2, // In pages array, find a subarray of [HomePage, Detail, Order] arrayFilter((i, p) -> (pages[i]

Set Database Page Buffers The database cache is an area of RAM allocated to store (cache) database pages in memory to help improve the efficiency of the database performance. It is far quicker to read data database gets its own relatively small cache of 256 pages (was 75 before Firebird 3.0) while Superserver creates a much larger cache of 2048 pages which is shared between all the connections. Usually careful). The command to set the number of cache pages is: gfix -b[uffers] BUFFERS database_name This command allows you to change the number of buffers (pages) allocated in RAM to create the database cache

...................................... 2787 F.23. pageinspect — low-level inspection of database pages ............................. 2795 F.24. passwordcheck — verify password strength ............... text-oriented tool, a graphical application, a web server that accesses the database to display web pages, or a specialized database maintenance tool. Some client applications are supplied with the PostgreSQL through a chain of grants) will lose the privilege. For details see the GRANT and REVOKE reference pages. An object's owner can choose to revoke their own ordinary privileges, for example to make a table

...................................... 2945 F.23. pageinspect — low-level inspection of database pages .................................. 2953 F.24. passwordcheck — verify password strength .......... text-oriented tool, a graphical application, a web server that accesses the database to display web pages, or a specialized database maintenance tool. Some client applications are supplied with the PostgreSQL through a chain of grants) will lose the privilege. For details see the GRANT and REVOKE reference pages. An object's owner can choose to revoke their own ordinary privileges, for example to make a table

text-oriented tool, a graphical application, a web server that accesses the database to display web pages, or a specialized database maintenance tool. Some client applications are supplied with the PostgreSQL through a chain of grants) will lose the privilege. For details see the GRANT and REVOKE reference pages. An object's owner can choose to revoke their own ordinary privileges, for example to make a table summary index tuple by scan- 415 Functions and Operators Function Description ning those table pages. Returns the number of new page range summaries that were inserted into the index. brin_summarize_range

text-oriented tool, a graphical application, a web server that accesses the database to display web pages, or a specialized database maintenance tool. Some client applications are supplied with the PostgreSQL through a chain of grants) will lose the privilege. For details see the GRANT and REVOKE reference pages. An object's owner can choose to revoke their own ordinary privileges, for example to make a table summarized by the index; for any such range it creates a new summary index tuple by scanning those table pages. Returns the number of new page range summaries that were inserted into the index. brin_summarize_range

old_snapshot_threshold state ....................... 2898 F.25. pageinspect — low-level inspection of database pages .................................. 2899 F.26. passwordcheck — verify password strength .......... text-oriented tool, a graphical application, a web server that accesses the database to display web pages, or a specialized database maintenance tool. Some client applications are supplied with the PostgreSQL through a chain of grants) will lose the privilege. For details see the GRANT and REVOKE reference pages. An object's owner can choose to revoke their own ordinary privileges, for example to make a table