September 2016
Intermediate to advanced
378 pages
7h 29m
German
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6 Threadpools
Zahlreiche Aufgaben, die nebenläufig ausgeführt werden sollen, sind oft nur von kurzer Dauer und treten nicht unbedingt regelmäßig auf. Würde man also für jede neue Aufgabe einen Thread erzeugen und starten, würde das Betriebssystem unnötig belastet werden. Es ist sinnvoller, Threads wiederzuverwenden.
Ein weiterer Punkt ist, dass sich eine große Anzahl von Threads negativ auf die Systemleistung auswirkt. Die maximale Anzahl von nebenläufigen Aktivitäten, die ein Prozess verwalten kann, ist nicht festgelegt und hängt von der Implementierung der JVM und dem zugrunde liegenden Betriebssystem ab. Es ist daher wichtig, die Menge der erzeugten Threads zu beschränken.
In der Praxis wird man deshalb weniger mit rudimentären Thread-Objekten ...
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