diff options
| -rw-r--r-- | src/cuirass/database.scm | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/src/cuirass/database.scm b/src/cuirass/database.scm index f1d0118..5ca3ad3 100644 --- a/src/cuirass/database.scm +++ b/src/cuirass/database.scm @@ -99,6 +99,11 @@ SQL statement to DB. FMT and ARGS are passed to 'format'." (reverse! insts) (loop (cons inst insts)))))))) +(define (wal-mode db) + "Turn DB in \"write-ahead log\" mode and return it." + (sqlite-exec db "PRAGMA journal_mode=WAL;") + db) + (define* (db-init #:optional (db-name (%package-database)) #:key (schema (%package-schema-file))) "Open the database to store and read jobs and builds informations. Return a @@ -115,9 +120,12 @@ database object." (define* (db-open #:optional (db (%package-database))) "Open database to store or read jobs and builds informations. Return a database object." - (if (file-exists? db) - (sqlite-open db SQLITE_OPEN_READWRITE) - (db-init db))) + ;; Use "write-ahead log" mode because it improves concurrency and should + ;; avoid SQLITE_LOCKED errors when we have several readers: + ;; <https://www.sqlite.org/wal.html>. + (wal-mode (if (file-exists? db) + (sqlite-open db SQLITE_OPEN_READWRITE) + (db-init db)))) (define (db-close db) "Close database object DB." |