| - | - | maxConvertWorker | The maximize meter convert worker. | SW_PROMETHEUS_FETCHER_NUM_CONVERT_WORKER | -1(by default, half the number of CPU core(s)) |
| kafka-fetcher | default | Read [fetcher doc](backend-fetcher.md) for more details | - | - |
| - | - | bootstrapServers | A list of host/port pairs to use for establishing the initial connection to the Kafka cluster. | SW_KAFKA_FETCHER_SERVERS | localhost:9092 |
| - | - | namespace | namespace aims to isolate multi OAP cluster when using the same Kafka cluster.if you set a namespace for Kafka fetcher, OAP will add a prefix to topic name. you should also set namespace in `agent.config`, the property named| SW_NAMESPACE | - |