go
resource_error
ai_generated
true
sql:连接池耗尽:打开连接过多(max_open_conns=10)
sql: connection pool exhausted: too many open connections (max_open_conns=10)
ID: go/sql-too-many-open-connections
80%修复率
86%置信度
0证据数
2024-02-18首次发现
版本兼容性
| 版本 | 状态 | 引入 | 弃用 | 备注 |
|---|---|---|---|---|
| 1.18 | active | — | — | — |
| 1.21 | active | — | — | — |
根因分析
处理程序获取连接后未 Close rows 或归还连接,或 MaxOpenConns 对并发量设置过低。未关闭的 *sql.Rows 会耗尽连接池。
English
Handlers acquire connections but never Close rows or return them, or MaxOpenConns is set too low for concurrency. Leaked *sql.Rows exhaust the pool.
解决方案
-
92% 成功率
rows, err := db.QueryContext(ctx, q) if err != nil { return err } defer rows.Close() for rows.Next() { ... } return rows.Err() -
85% 成功率
db.SetMaxOpenConns(50) db.SetMaxIdleConns(25) db.SetConnMaxLifetime(5*time.Minute)
无效尝试
常见但无效的做法:
-
80% 失败
Hides the leak and can exhaust the database server's connection limit.
-
90% 失败
Does not release leaked connections; just delays the failure.