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authorEfraim Flashner <efraim@flashner.co.il>2022-10-19 12:19:04 +0300
committerEfraim Flashner <efraim@flashner.co.il>2022-11-06 14:02:08 +0200
commit97d565c786ee1a1eb920ed66384f60aad20e5cc2 (patch)
treee75a0a70ad8644fa76b3efd162b4430fb7078735
parent2bf8146e311694ff8cdce9f0b1e638374682012a (diff)
guix gc: Add '--vacuum-database'.
* guix/scripts/gc.scm (show-help, %options): Add '--vacuum-database'. * guix/store/database.scm (vacuum-database): New procedure. * doc/guix.texi (Invoking guix gc): Document the option.
-rw-r--r--doc/guix.texi12
-rw-r--r--guix/scripts/gc.scm11
-rw-r--r--guix/store/database.scm9
3 files changed, 31 insertions, 1 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index 7806b21a0f..1eb47e31cf 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -4531,6 +4531,18 @@ import, unless it was started with @option{--disable-deduplication}
this option is primarily useful when the daemon was running with
@option{--disable-deduplication}.
+@item --vacuum-database
+@cindex vacuum the store database
+@comment Avoid words like 'repair,' 'compress,' and 'optimize.'
+Guix uses an sqlite database to keep track of the items in (@pxref{The Store}).
+Over time it is possible that the database may grow to a large size and become
+fragmented. As a result, one may wish to clear the freed space and join the
+partially used pages in the database left behind from removed packages or after
+running the garbage collector. Running @command{sudo guix gc
+--vacuum-database} will lock the database and @code{VACUUM} the store,
+defragmenting the database and purging freed pages, unlocking the database when
+it finishes.
+
@end table
@node Invoking guix pull
diff --git a/guix/scripts/gc.scm b/guix/scripts/gc.scm
index 65cd4bdf8b..5e775c5cdb 100644
--- a/guix/scripts/gc.scm
+++ b/guix/scripts/gc.scm
@@ -1,5 +1,6 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012-2013, 2015-2020, 2022 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2022 Efraim Flashner <efraim@flashner.co.il>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -27,6 +28,7 @@
generation-number)
#:autoload (guix scripts package) (delete-generations)
#:autoload (gnu home) (home-generation-base)
+ #:autoload (guix store database) (vacuum-database)
#:use-module (ice-9 match)
#:use-module (ice-9 regex)
#:use-module (srfi srfi-1)
@@ -87,6 +89,10 @@ Invoke the garbage collector.\n"))
--clear-failures remove PATHS from the set of cached failures"))
(newline)
(display (G_ "
+ --vacuum-database repack the sqlite database tracking the store
+ using less space"))
+ (newline)
+ (display (G_ "
-h, --help display this help and exit"))
(display (G_ "
-V, --version display version information and exit"))
@@ -131,6 +137,11 @@ current one."
(lambda args
(show-version-and-exit "guix gc")))
+ (option '("vacuum-database") #f #f
+ (lambda args
+ (vacuum-database)
+ (exit 0)))
+
(option '(#\C "collect-garbage") #f #t
(lambda (opt name arg result)
(let ((result (alist-cons 'action 'collect-garbage
diff --git a/guix/store/database.scm b/guix/store/database.scm
index 8d08def833..e664015673 100644
--- a/guix/store/database.scm
+++ b/guix/store/database.scm
@@ -2,6 +2,7 @@
;;; Copyright © 2017, 2019 Caleb Ristvedt <caleb.ristvedt@cune.org>
;;; Copyright © 2018, 2020, 2021 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+;;; Copyright © 2022 Efraim Flashner <efraim@flashner.co.il>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -45,7 +46,8 @@
sqlite-register
register-items
%epoch
- reset-timestamps))
+ reset-timestamps
+ vacuum-database))
;;; Code for working with the store database directly.
@@ -438,3 +440,8 @@ typically by adding them as temp-roots."
(register db item)
(report))
items)))))
+
+(define (vacuum-database)
+ (let ((db (sqlite-open (store-database-file))))
+ (sqlite-exec db "VACUUM;")
+ (sqlite-close db)))