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Neotux
Apprentice
Joined: 14 Feb 2003
Posts: 162
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 Posted: Sun Jan 04, 2004 4:44 pm Post subject: swap prioity? |
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hi,
beim start steht da, dass swap ne priority von -1 hat. in der docu steht, dass swap eine priority von 0-32767 haben muss.
so jetzt meine Frage:
die priority hat nur auswirkungen, wenn man mehrer swap drives hat, oder?
und welche auswirkung hat -1? der swap funktionierte bei mir eigentlich immer recht ordentlich. |
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mrsteven
Veteran
Joined: 04 Jul 2003
Posts: 1939
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| Posted: Sun Jan 04, 2004 6:11 pm Post subject: |
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| man 2 swapon wrote: |
PRIORITY
Each swap area has a priority, either high or low. The default prior-
ity is low. Within the low-priority areas, newer areas are even lower
priority than older areas.
All priorities set with swapflags are high-priority, higher than
default. They may have any non-negative value chosen by the caller.
Higher numbers mean higher priority.
Swap pages are allocated from areas in priority order, highest priority
first. For areas with different priorities, a higher-priority area is
exhausted before using a lower-priority area. If two or more areas
have the same priority, and it is the highest priority available, pages
are allocated on a round-robin basis between them.
As of Linux 1.3.6, the kernel usually follows these rules, but there
are exceptions.
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-1 bedeutet einfach: Keine Priorität gesetzt, also niedrige Default-Priorität. AFAIK hat die Priorität bei nur einer Swap-Partition keine Auswirkungen. Bei mehreren kannst du z.B. der schnelleren Festplatte den Vorzug geben. |
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Neotux
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Joined: 14 Feb 2003
Posts: 162
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| Posted: Sun Jan 04, 2004 6:25 pm Post subject: |
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ok, danke, dami währe das geklärt  |
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