From f4fdf49846ddb34a80305631eca165c2a69b277a Mon Sep 17 00:00:00 2001
From: qianbin <cola.tin.com@gmail.com>
Date: Tue, 12 Feb 2019 11:09:24 +0800
Subject: [PATCH 1/2] upgrade go-sqlite to turn on WAL journal mode

---
 Gopkg.lock     | 6 +++---
 Gopkg.toml     | 2 +-
 logdb/logdb.go | 2 +-
 vendor         | 2 +-
 4 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/Gopkg.lock b/Gopkg.lock
index 46d86facb..828402ef1 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -195,12 +195,12 @@
   version = "v0.0.3"
 
 [[projects]]
-  digest = "1:3fb35ae39e9624f72293618b8cdde0c9d47f67fd2bc208e4592e4b846291fc9f"
+  digest = "1:8bbdb2b3dce59271877770d6fe7dcbb8362438fa7d2e1e1f688e4bf2aac72706"
   name = "github.com/mattn/go-sqlite3"
   packages = ["."]
   pruneopts = ""
-  revision = "6c771bb9887719704b210e87e934f08be014bdb1"
-  version = "v1.6.0"
+  revision = "c7c4067b79cc51e6dfdcef5c702e74b1e0fa7c75"
+  version = "v1.10.0"
 
 [[projects]]
   branch = "master"
diff --git a/Gopkg.toml b/Gopkg.toml
index 27b9d5eea..6d7c25bbe 100644
--- a/Gopkg.toml
+++ b/Gopkg.toml
@@ -52,7 +52,7 @@ ignored = []
 
 [[constraint]]
   name = "github.com/mattn/go-sqlite3"
-  version = "1.6.0"
+  version = "1.10.0"
 
 [[constraint]]
   branch = "master"
diff --git a/logdb/logdb.go b/logdb/logdb.go
index 403f931a9..c432bc198 100644
--- a/logdb/logdb.go
+++ b/logdb/logdb.go
@@ -25,7 +25,7 @@ type LogDB struct {
 
 // New create or open log db at given path.
 func New(path string) (logDB *LogDB, err error) {
-	db, err := sql.Open("sqlite3", path)
+	db, err := sql.Open("sqlite3", path+"?_journal=wal&cache=shared")
 	if err != nil {
 		return nil, err
 	}
diff --git a/vendor b/vendor
index 84b36a739..a88695ceb 160000
--- a/vendor
+++ b/vendor
@@ -1 +1 @@
-Subproject commit 84b36a739465851dc1255f98cc2cb789caf02b6a
+Subproject commit a88695ceb7be947564092e880605a15eb4417ca1

From 0a0ff615464ca4fd5759c50cc2ac2c71737200f9 Mon Sep 17 00:00:00 2001
From: qianbin <cola.tin.com@gmail.com>
Date: Tue, 12 Feb 2019 13:20:36 +0800
Subject: [PATCH 2/2] fix: 'database is locked' on querying sqlite

---
 logdb/logdb.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/logdb/logdb.go b/logdb/logdb.go
index c432bc198..8e4982263 100644
--- a/logdb/logdb.go
+++ b/logdb/logdb.go
@@ -34,6 +34,10 @@ func New(path string) (logDB *LogDB, err error) {
 			db.Close()
 		}
 	}()
+
+	// to avoid 'database is locked' error
+	db.SetMaxOpenConns(1)
+
 	if _, err := db.Exec(eventTableSchema + transferTableSchema); err != nil {
 		return nil, err
 	}