Keep primary key / index key as tiny as possible
Category: Developer Story
Is 20M of rows still a valid soft limit of MySQL table in 2023?
Innodb_buffer_pool size / table size decides whether there'll be a performance downgrade.
Packet capture experiment 2: send/receive buffer
Don't hardcode buffer size. Don't keep CPU usage so high.
Packet capture experiment 1: packet delay, loss, duplicate, corrupt, out-of-order and bandwidth limit
Patterns of network issues
Spot instance termination makes pipeline runtime unstable
Spot instance can save a lot of cost if it fits your use case.
Redis closes connection due to big keys
Again, avoid redis big keys
Boardcast variable causes Spark driver OOM
Monitor broadcast variable's size.
Fail to distinguish alarm emails due to similar subject
Make alarm email subject different at length.
rm -r ~/ deletes public key
It's a very risky command.