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what are the different values for this preference "browser.cache.disk.capacity"?

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  • Last reply by cor-el

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on some websites it says -1 tells Firefox to automatically determine the size of the cache based on your physical disk and setting it to 0 would effectively disable any disk cache entrys.

so are this informations true and if not, how do i still let firefox automatically determine the size of the cache based on my physical disk?

on some websites it says '''''-1 tells Firefox to automatically determine the size of the cache based on your physical disk''''' and setting it to 0 would effectively disable any disk cache entrys. so are this informations true and if not, how do i still let firefox automatically determine the size of the cache based on my physical disk?

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and in which unit is the default cache capacity size? mb or kb?

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See:

# Disk cache capacity in kilobytes. It's used only when
# browser.cache.disk.smart_size.enabled == false
- name: browser.cache.disk.capacity
  type: RelaxedAtomicUint32
  value: 256000
  mirror: always
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cor-el said

See: # Disk cache capacity in kilobytes. It's used only when # browser.cache.disk.smart_size.enabled == false - name: browser.cache.disk.capacity type: RelaxedAtomicUint32 value: 256000 mirror: always

1. from when is this? when was it last updated? 2. you didn't answer my question properly with this copy pasted info.

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You may deduct from the comment in the source code that setting browser.cache.disk.smart_size.enabled = true enables Firefox to automatically determine the size of the cache. There is no need to modify browser.cache.disk.capacity, merely flipping browser.cache.disk.smart_size.enabled is sufficient to enable/disable this feature.

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cor-el said

You may deduct from the comment in the source code that setting browser.cache.disk.smart_size.enabled = true enables Firefox to automatically determine the size of the cache. There is no need to modify browser.cache.disk.capacity, merely flipping browser.cache.disk.smart_size.enabled is sufficient to enable/disable this feature.

and what about the ram? isn't there a smart size preference for the ram?

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For the memory cache you need to modify the pref directly as you can see if you read the lines about browser.cache.memory.capacity right below the disk cache pref.

# -1 = determine dynamically, 0 = none, n = memory capacity in kilobytes.
- name: browser.cache.memory.capacity
  type: RelaxedAtomicInt32
  value: -1
  mirror: always
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so you're telling me that for the disk cache there are 2 preferences, a preference for the normal disk cache capacity(browser.cache.disk.capacity) and a preference for smart disk cache(browser.cache.disk.smart_size.enabled) to let firefox dynamically determine the disk cache size while the memory cache has both of them in one preferences like the line you provided does say?

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You can see the effect of the settings by visiting about:cache in the address bar.

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See also bug 1027944.

  • 1027944 - When disk cache is disabled, hide "disk" cache section in about:cache (otherwise it repeats "memory" entries for "disk" category)