apt_dpkg: exclude {usr/,}lib/modules and more from Contents-*.gz cache#596
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bdrung merged 1 commit intocanonical:mainfrom Apr 24, 2026
Merged
apt_dpkg: exclude {usr/,}lib/modules and more from Contents-*.gz cache#596bdrung merged 1 commit intocanonical:mainfrom
bdrung merged 1 commit intocanonical:mainfrom
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #596 +/- ##
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Coverage 84.51% 84.51%
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Files 104 104
Lines 20987 20988 +1
Branches 3218 3218
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+ Hits 17738 17739 +1
Misses 2808 2808
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LGTM, with just a little question.
The Contents-*.gz cache becomes bigger and bigger the longer a stable release ages (due to more and more kernel package versions in the archive). | Path | jammy | noble | questing | resolute | |----------------------------|------------|------------|------------|------------| | : | 0 | 0 | 0 | 0 | | boot | 4,654 | 2,647 | 366 | 137 | | lib/modules | 10,206,350 | 5,492,830 | 475,055 | 9,120 | | usr/[^/]+/include | 107,568 | 170,800 | 103,340 | 127,294 | | usr/include | 278,938 | 271,587 | 295,470 | 298,389 | | usr/lib/modules | 0 | 0 | 0 | 73,589 | | usr/share/cargo/registry | 28,202 | 74,721 | 102,428 | 127,537 | | usr/share/doc | 3,025,577 | 2,938,577 | 2,636,718 | 2,766,784 | | usr/share/gimp/.../help | 38,220 | 73,845 | 78,120 | 85,216 | | usr/share/gocode | 112,802 | 168,941 | 199,405 | 227,626 | | usr/share/help | 121,470 | 124,824 | 118,948 | 119,346 | | usr/share/icons | 605,862 | 659,375 | 715,984 | 753,986 | | usr/share/libreoffice/help | 93,359 | 98,690 | 100,540 | 100,580 | | usr/share/locale | 95,312 | 110,122 | 123,230 | 123,842 | | usr/share/man | 149,353 | 165,310 | 175,262 | 177,041 | | usr/share/texlive | 145,420 | 168,740 | 170,265 | 171,546 | | usr/src | 39,533,381 | 21,538,896 | 2,201,315 | 420,916 | | var | 15,759 | 35,438 | 37,204 | 37,552 | | **current** | 13,711,111 | 9,541,912 | 4,444,324 | 4,268,204 | | **new** | 3,365,393 | 3,839,911 | 3,725,751 | 3,909,851 | This causes the cache to contain 13 million entries for jammy and to need more than 5 GiB of memory to retrace crashes. Exclude the kernel directories `usr/lib/modules` and `lib/modules`, the help directories `usr/share/libreoffice/help` and `usr/share/gimp/.../help`, and the source code directory `usr/share/cargo/registry` from the cache. Simplify the exclusion rule by dropping `:`, `boot`, and `var` since those directory do not contain many entries. Note: The package fex in xenial contains a file named `/:sexsend:sexget:`. This change reduced the cache creation time from 35.1 seconds down to 25.4 seconds for jammy amd64 on my Intel Core Ultra 9 285K desktop machine. The size reported by `sys.getsizeof()` reduced from 671 MB to 167 MB. Bug: https://launchpad.net/bugs/2073787 Signed-off-by: Benjamin Drung <benjamin.drung@canonical.com>
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The Contents-*.gz cache becomes bigger and bigger the longer a stable release ages (due to more and more kernel package versions in the archive).
This causes the cache to contain 13 million entries for jammy and to need more than 5 GiB of memory to retrace crashes.
Exclude the kernel directories
usr/lib/modulesandlib/modules, the help directoriesusr/share/libreoffice/helpandusr/share/gimp/.../help, and the source code directoryusr/share/cargo/registryfrom the cache. Simplify the exclusion rule by dropping:,boot, andvarsince those directory do not contain many entries. Note: The package fex in xenial contains a file named/:sexsend:sexget:.This change reduced the cache creation time from 35.1 seconds down to 25.4 seconds for jammy amd64 on my Intel Core Ultra 9 285K desktop machine. The size reported by
sys.getsizeof()reduced from 671 MB to 167 MB.Bug: https://launchpad.net/bugs/2073787