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Diffstat (limited to 'db.go')
-rw-r--r--db.go17
1 files changed, 16 insertions, 1 deletions
diff --git a/db.go b/db.go
index c768ce3..ed0f2cd 100644
--- a/db.go
+++ b/db.go
@@ -351,7 +351,6 @@ func (db *DB) beginTx() (*Tx, error) {
// Lock the meta pages while we initialize the transaction.
db.metalock.Lock()
- defer db.metalock.Unlock()
// Exit if the database is not open yet.
if !db.opened {
@@ -365,6 +364,16 @@ func (db *DB) beginTx() (*Tx, error) {
// Keep track of transaction until it closes.
db.txs = append(db.txs, t)
+ n := len(db.txs)
+
+ // Unlock the meta pages.
+ db.metalock.Unlock()
+
+ // Update the transaction stats.
+ db.statlock.Lock()
+ db.stats.TxN++
+ db.stats.OpenTxN = n
+ db.statlock.Unlock()
return t, nil
}
@@ -418,12 +427,14 @@ func (db *DB) removeTx(tx *Tx) {
break
}
}
+ n := len(db.txs)
// Unlock the meta pages.
db.metalock.Unlock()
// Merge statistics.
db.statlock.Lock()
+ db.stats.OpenTxN = n
db.stats.TxStats.add(&tx.stats)
db.statlock.Unlock()
}
@@ -612,6 +623,10 @@ func (db *DB) allocate(count int) (*page, error) {
// Stats represents statistics about the database.
type Stats struct {
+ // Transaction stats
+ TxN int // total number of completed read transactions
+ OpenTxN int // number of currently open read transactions
+
TxStats TxStats // global, ongoing stats.
}