DynamicConnectionQuota

max.connections
max.connections.per.ip
max.connections.per.ip.overrides

服务端最大连接数限制

客户端每个ip最大连接数限制

客户端每个具体ip最大连接数量限制，格式为：100.127.0.0.1:200,100,127.0.0.2:200,...

Listener configs
listeners
advertised.listeners
listener.security.protocol.map

SSL configs

principal.builder.class
ssl.protocol
ssl.provider
ssl.cipher.suites
ssl.enabled.protocols
ssl.keystore.type
ssl.keystore.location
ssl.keystore.password
ssl.key.password
ssl.truststore.type
ssl.truststore.location
ssl.truststore.password
ssl.keymanager.algorithm
ssl.trustmanager.algorithm
ssl.endpoint.identification.algorithm
ssl.secure.random.implementation
ssl.client.auth

SASL configs
sasl.mechanism.inter.broker.protocol
sasl.jaas.config
sasl.enabled.mechanisms
sasl.kerberos.service.name
sasl.kerberos.kinit.cmd
sasl.kerberos.ticket.renew.window.factor
sasl.kerberos.ticket.renew.jitter
sasl.kerberos.min.time.before.relogin
sasl.kerberos.principal.to.local.rules
sasl.login.refresh.window.factor
sasl.login.refresh.window.jitter
sasl.login.refresh.min.period.seconds
sasl.login.refresh.buffer.seconds

log.segment.bytes (segment.bytes)
log.roll.ms, log.roll.hours (segment.ms)
log.roll.jitter.ms, log.roll.jitter.hours (segment.jitter.ms)
log.index.size.max.bytes (segment.index.bytes)
log.flush.interval.messages (flush.messages)
log.flush.interval.ms (flush.ms)
log.retention.bytes (retention.bytes)
log.retention.ms, log.retention.minutes, log.retention.hours (retention.ms)
message.max.bytes(max.message.bytes)
log.index.interval.bytes (index.interval.bytes)
log.cleaner.delete.retention.ms (delete.retention.ms)
log.cleaner.min.compaction.lag.ms (min.compaction.lag.ms)
log.cleaner.min.cleanable.ratio (min.cleanable.dirty.ratio)
log.cleanup.policy (cleanup.policy)
log.segment.delete.delay.ms (file.delete.delay.ms)
unclean.leader.election.enable (unclean.leader.election.enable)
min.insync.replicas (min.insync.replicas)
max.message.bytes (max.message.bytes)
compression.type (compression.type)
log.preallocate (preallocate)
log.message.timestamp.type (message.timestamp.type)
log.message.timestamp.difference.max.ms (message.timestamp.difference.max.ms)
log.message.downconversion.enable(message.downconversion.enable)

log.segment.bytes (segment.bytes)

log.segment.bytes为brokers类型配置

segment.bytes为topics类型配置，其他同理

log.cleaner.threads
log.cleaner.dedupe.buffer.size
log.cleaner.io.buffer.load.factor
log.cleaner.io.buffer.size
log.cleaner.io.max.bytes.per.second
log.cleaner.backoff.ms

Kafka提供了Metrics Reporter的插件扩展功能，默认提供了JmxReporter实现，也即我们已经可以通过JMX工具来查看Kafka的Metrics。所以我们可以自己实现一套Metrics Reporter（实现org.apache.kafka.common.metrics.MetricsReporter），来自定义获取这些Metrics。

num.io.threads
num.network.threads
num.replica.fetchers
num.recovery.threads.per.data.dir
background.threads

新线程池数量公式：

newValue > oldValue / 2 && newValue <= oldValue * 2

当指定线程池数量大于运行时，就会创建扩容，当小于时，就会销毁收缩

leader.replication.throttled.rate
follower.replication.throttled.rate
replica.alter.log.dirs.io.max.bytes.per.second

限制leader副本端处理FETCH请求的每秒流量上限，单位为bytes/sec，表示最高为xxx bytes/sec
限制follower副本发送FETCH请求的每秒流量上限，单位为bytes/sec，表示最高为xxx bytes/sec
限制磁盘内目录之间拷贝迁移每秒流量上限，单位bytes/sec，表示最高为xxx bytes/sec