nginx
resource_error
ai_generated
true
“limit_conn_zone”中的 1024 个区域不够
nginx: [emerg] 1024 zones are not enough in "limit_conn_zone"
ID: nginx/limit-conn-zone-too-small
90%修复率
85%置信度
1证据数
2024-07-18首次发现
版本兼容性
| 版本 | 状态 | 引入 | 弃用 | 备注 |
|---|---|---|---|---|
| nginx/1.18.0 | active | — | — | — |
| nginx/1.20.0 | active | — | — | — |
| nginx/1.24.0 | active | — | — | — |
| nginx/1.26.0 | active | — | — | — |
根因分析
limit_conn_zone 指令为每个键分配了固定数量的插槽(默认 1024),在高并发下会耗尽。
English
The limit_conn_zone directive allocates a fixed number of slots (default 1024) for tracking connections per key, which is exhausted under high concurrency.
官方文档
https://nginx.org/en/docs/http/ngx_http_limit_conn_module.html#limit_conn_zone解决方案
-
增加 limit_conn_zone 指令中的区域大小:`limit_conn_zone $binary_remote_addr zone=addr:10m;`(默认是 1m,可容纳约 1024 个区域)
-
如果使用多个键,为每个键创建单独的区域以分散负载:`limit_conn_zone $server_name zone=server:5m; limit_conn_zone $binary_remote_addr zone=addr:5m;`
-
使用状态模块监控区域使用情况并动态调整:在 location 中添加 `stub_status;` 并检查活跃连接以估算所需的区域大小。
无效尝试
常见但无效的做法:
-
80% 失败
limit_conn controls the maximum number of connections per key, not the number of zones/slots available for tracking.
-
30% 失败
This eliminates the error but also removes the intended connection limiting functionality, potentially leading to resource exhaustion.
-
50% 失败
Large zones consume significant memory; if the system runs out of memory, nginx may crash or fail to start.