1257404 - Changing browser.cache.disk.capacity does reset it to 358400 after a few seconds

Status: RESOLVED INVALID

(Firefox :: Settings UI, defect)

Description

[sworddragon2]

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0
Build ID: 20160304115459

Steps to reproduce:

1. Go to about:config and set browser.cache.disk.capacity to a value higher as 358400 (for example 358401).
2. Wait a few seconds.


Actual results:

In about:config browser.cache.disk.capacity got reset to 358400.


Expected results:

browser.cache.disk.capacity should keep the set value.


Additional information:

This bug triggers also shortly after creating a new profile. In my case on a new profile browser.cache.disk.capacity is 1048576 but gets then set to 358400 after a few seconds.

Comment 1

[sworddragon2]

Edit: Also I'm noticing that lower values (for example by resetting browser.cache.disk.capacity (applies 256000)) do reset the value to 358400 after a few seconds.

Comment 2

[Benno Schulenberg]

For me, 350 MB is far too much -- I want it down to 50 MB, which should be its default value according to http://kb.mozillazine.org/Browser.cache.disk.capacity.

Hmmm...  It seems to be holding the value 51200 now for more than five minutes already.  Maybe the value
needs to be a multiple of 512 or 1024 or something?

Comment 3

[Benno Schulenberg]

And as soon as I submitted the comment, the value jumped to 358400 again.  :|

Comment 4

[panis.panis]

You have to change "browser.cache.disk.smart_size.enabled" to FALSE and then "browser.cache.disk.capacity" will stick to your custom value.

Comment 5

[sworddragon2]

Indeed, setting browser.cache.disk.smart_size.enabled to false does not change automatically browser.cache.disk.capacity anymore. So it appears browser.cache.disk.smart_size.enabled set to true is just some sort of automatic cache management and all is working as intended.