Der Firebird Cache-Buffer Norman Dunbar, Martin Köditz Version 1.2-de, 28. Mai 2020 Inhaltsverzeichnis 1. Einleitung . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Der Firebird-Cache. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Inhaltsverzeichnis 1 Kapitel 1. Einleitung Firebird nutzt einen Seiten-Cache (engl. page cache), um die Seiten im Speicher vorzuhalten. Diese sind deutlich schneller aus dem Arbeitsspeicher

. . . . . . . . . . . . . . . . . . . . . . . . . . . 328 Inhaltsverzeichnis 6 6.8. EXECUTE BLOCK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Trigger) verfügbar, aber in neueren Versionen wurden sie auch in Dynamic SQL aufgetaucht (siehe EXECUTE BLOCK). Embedded SQL definiert die DSQL-Untermenge, die von Firebird gpre unterstützt wird, der Anwendung unterstützt zwei Arten von Kommentaren: block und in-line. Chapter 2. SQL Sprachstruktur 22 Syntax ::= <block comment> | <block comment> ::= /* [

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 2.2.1 apt contra apt-get / apt-cache contra aptitude . . . . . . . . . . . . . . . . . . . . . . . . . . 53 2.2.2 Grundlegende Paketm . 51 2.6 Grundlegende Paketmanagement-Operationen mit apt(8), aptitude(8) und apt-get(8) / apt-cache(8) . 55 2.7 Erwähnenswerte Befehlsoptionen für aptitude(8) . . . . . . . . . . . . . . . . . . . Geben Sie Folgendes ein, um weitere Informationen zu dem Paket zu erhalten: $ dpkg -L vim $ apt-cache show vim $ aptitude show vim Bei Dokumentation wird der Ablageort entweder über den Dateinamen in

Superserver Prozesse Erzeugt für jede Clientverbindung einen eigenen Prozess, mit dessen eigenem Cache. Weniger Ressourcenverbrauch bei einer geringen Anzahl an Verbindungen. Ein einzelner Prozess, der dungen zuständig ist, indem Threads zur Abarbeitung von Anfragen verwendet wer- den. Gemeinsamer Cache. Effizienter in Bezug auf Ressourcenverbrauch, falls die Anzahl der Verbindungen steigt. Erlaubt „if“ Anweisung NULL ist, dann verhält sich das wie false: das heißt, der 'then' Block wird übersprungen und der 'else' Block wird ausgeführt. Warnung Obwohl sich der Ausdruck in diesem Fall wie false verhält

@startuml concise "Client" as Client concise "Server" as Server concise "Response freshness" as Cache Server is idle Client is idle @Client 0 is send Client -> Server@+25 : GET +25 is await +75 is recv OK\nExpires: 275 +25 is idle +75 is recv +25 is send Server -> Client@+25 : 304 Not Modified +25 is idle @Cache 75 is fresh +200 is stale @enduml PlantUML Sprachreferenz (1.2020.23) 145 / 303 9.17 Digital Example You can also put several @startuml/@enduml text block in an included file and then specify which block you want to include adding !0 where 0 is the block number. The !0 notation denotes the first diagram

@startuml concise "Client" as Client concise "Server" as Server concise "Response freshness" as Cache Server is idle Client is idle @Client 0 is send Client -> Server@+25 : GET +25 is await +75 is recv OK\nExpires: 275 +25 is idle +75 is recv +25 is send Server -> Client@+25 : 304 Not Modified +25 is idle @Cache 75 is fresh +200 is stale @enduml PlantUML Sprachreferenz (1.2020.22) 134 / 291 9.17 Digital Example You can also put several @startuml/@enduml text block in an included file and then specify which block you want to include adding !0 where 0 is the block number. The !0 notation denotes the first diagram

@startuml concise "Client" as Client concise "Server" as Server concise "Response freshness" as Cache Server is idle Client is idle @Client 0 is send Client -> Server@+25 : GET +25 is await +75 is recv OK\nExpires: 275 +25 is idle +75 is recv +25 is send Server -> Client@+25 : 304 Not Modified +25 is idle @Cache 75 is fresh +200 is stale @enduml PlantUML Sprachreferenz (1.2023.11) 231 / 528 10.18 Digitales simple quote ' is a comment. @startuml 'Line comments use a single apostrophe @enduml 21.1.2 Block comment Block comment use C-style comments except that instead of * you use an apostrophe ', then you can

Sprachreferenz (1.2021.2) 194 / 405 10.17 Digital Example 10 TIMING DIAGRAM concise "Response freshness" as Cache Server is idle Client is idle @Client 0 is send Client -> Server@+25 : GET +25 is await +75 is recv OK\nExpires: 275 +25 is idle +75 is recv +25 is send Server -> Client@+25 : 304 Not Modified +25 is idle @Cache 75 is fresh +200 is stale @enduml 10.17 Digital Example @startuml scale 5 as 150 pixels clock clk You can also put several @startuml/@enduml text block in an included file and then specify which block you want to include adding !0 where 0 is the block number. The !0 notation denotes the first diagram

Sprachreferenz (1.2021.1) 182 / 383 10.17 Digital Example 10 TIMING DIAGRAM concise "Response freshness" as Cache Server is idle Client is idle @Client 0 is send Client -> Server@+25 : GET +25 is await +75 is recv OK\nExpires: 275 +25 is idle +75 is recv +25 is send Server -> Client@+25 : 304 Not Modified +25 is idle @Cache 75 is fresh +200 is stale @enduml 10.17 Digital Example @startuml scale 5 as 150 pixels clock clk You can also put several @startuml/@enduml text block in an included file and then specify which block you want to include adding !0 where 0 is the block number. The !0 notation denotes the first diagram

Sprachreferenz (1.2021.2) 184 / 388 10.17 Digital Example 10 TIMING DIAGRAM concise "Response freshness" as Cache Server is idle Client is idle @Client 0 is send Client -> Server@+25 : GET +25 is await +75 is recv OK\nExpires: 275 +25 is idle +75 is recv +25 is send Server -> Client@+25 : 304 Not Modified +25 is idle @Cache 75 is fresh +200 is stale @enduml 10.17 Digital Example @startuml scale 5 as 150 pixels clock clk You can also put several @startuml/@enduml text block in an included file and then specify which block you want to include adding !0 where 0 is the block number. The !0 notation denotes the first diagram