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Update 2.rocksdb-statistics.md #1091

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Oct 26, 2021
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Update 2.rocksdb-statistics.md #1091

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17 changes: 12 additions & 5 deletions docs-2.0/6.monitor-and-metrics/2.rocksdb-statistics.md
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Expand Up @@ -6,7 +6,7 @@ Nebula Graph 使用 RocksDB 作为底层存储，本文介绍如何收集和展

RocksDB 统计功能默认关闭，启动 RocksDB 统计功能，你需要：

1. 修改 `storaged.conf` 文件中 `--enable_rocksdb_statistics` 参数为 `true`。配置默认文件目录为 `/use/local/nebula/etc`。
1. 修改 `nebula-storaged.conf` 文件中 `--enable_rocksdb_statistics` 参数为 `true`。配置默认文件目录为 `/use/local/nebula/etc`。

2. 重启服务使修改生效。

Expand Down Expand Up @@ -49,12 +49,19 @@ rocksdb.bytes.read=1632

使用以下命令获取部分 JSON 格式的 RocksDB 统计信息：
```bash
curl -L "http://${storage_ip}:${port}/rocksdb_stats?stats=${stats_name}.&returnjson"
curl -L "http://${storage_ip}:${port}/rocksdb_stats?stats=${stats_name}&format=json"
```

例如使用以下语句获取 `rocksdb.bytes.read` 和 `rocksdb.block.cache.add`的统计信息并返回 JSON 的格式数据。
```bash
curl -L "http://172.28.2.1:19779/rocksdb_stats?stats=rocksdb.bytes.read,rocksdb.block.cache.add&returnjson"

[{"value":14,"name":rocksdb.block.cache.add},{"value":1632,"name":"rocksdb.bytes.read"}]
curl -L "http://172.28.2.1:19779/rocksdb_stats?stats=rocksdb.bytes.read,rocksdb.block.cache.add&format=json"

[
{
"rocksdb.block.cache.add": 1
},
{
"rocksdb.bytes.read": 160
}
]
```