software/grafana: enable wal for grafana's sqlite

software/grafana/buildout.hash.cfg

@@ -32,7 +32,7 @@ md5sum = a28972ced3e0f4aa776e43a9c44717c0
 
 [grafana-config-file]
 filename = grafana-config-file.cfg.in
-md5sum = 2b75d6b1984d9d154303ec773aa88474
+md5sum = 258a25781f164f933fae12b9e1bc55fc
 
 [grafana-provisioning-dashboards-config-file]
 filename = grafana-provisioning-dashboards-config-file.cfg.in

software/grafana/grafana-config-file.cfg.in

@@ -106,6 +106,18 @@ server_cert_name =
 # For "sqlite3" only, path relative to data_path setting
 path = grafana.db
 
+# For "sqlite3" only. cache mode setting used for connecting to the database
+cache_mode = private
+
+# For "sqlite3" only. Enable/disable Write-Ahead Logging, https://sqlite.org/wal.html. Default is false.
+wal = true
+
+# For "sqlite" only. How many times to retry query in case of database is locked failures. Default is 0 (disabled).
+query_retries = 2
+
+# For "sqlite" only. How many times to retry transaction in case of database is locked failures. Default is 5.
+transaction_retries = 5
+
 #################################### Session #############################
 [session]
 # Either "memory", "file", "redis", "mysql", "postgres", "memcache", default is "file"