bin/kafka-topics.sh --zookeeper localhost:2181 --list
bin/kafka-topics.sh --zookeeper localhost:2181 --describe --topic mytopic
bin/kafka-topics.sh --zookeeper localhost:2181 --alter --topic mytopic --config retention.ms=1000
... wait a minute ...
Sanjeev Kumar Dangi skdangi
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| com.sun.management:type=DiagnosticCommand | |
| com.sun.management:type=HotSpotDiagnostic | |
| java.lang:name=CodeCacheManager,type=MemoryManager | |
| java.lang:name=Code Cache,type=MemoryPool | |
| java.lang:name=Compressed Class Space,type=MemoryPool | |
| java.lang:name=G1 Eden Space,type=MemoryPool | |
| java.lang:name=G1 Old Generation,type=GarbageCollector | |
| java.lang:name=G1 Old Gen,type=MemoryPool | |
| java.lang:name=G1 Survivor Space,type=MemoryPool | |
| java.lang:name=G1 Young Generation,type=GarbageCollector |
ursuad
/ kafka-cheat-sheet.md
Last active
March 21, 2026 02:57
Quick command reference for Apache Kafka
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| Producer | |
| Setup | |
| bin/kafka-topics.sh --zookeeper esv4-hcl197.grid.linkedin.com:2181 --create --topic test-rep-one --partitions 6 --replication-factor 1 | |
| bin/kafka-topics.sh --zookeeper esv4-hcl197.grid.linkedin.com:2181 --create --topic test --partitions 6 --replication-factor 3 | |
| Single thread, no replication | |
| bin/kafka-run-class.sh org.apache.kafka.clients.tools.ProducerPerformance test7 50000000 100 -1 acks=1 bootstrap.servers=esv4-hcl198.grid.linkedin.com:9092 buffer.memory=67108864 batch.size=8196 |
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| Latency Comparison Numbers (~2012) | |
| ---------------------------------- | |
| L1 cache reference 0.5 ns | |
| Branch mispredict 5 ns | |
| L2 cache reference 7 ns 14x L1 cache | |
| Mutex lock/unlock 25 ns | |
| Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
| Compress 1K bytes with Zippy 3,000 ns 3 us | |
| Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
| Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |