[Bigdata] Flume file channel CPU consumption is higher than memory channel reason

https://www.quora.com/ Why-does-flume-take-more-resource-cpu-when-file-channel-is-used-compared-to-when-memory-channel-is-used

In case of File channel, the CPU would is used for the following

• serializing/deserializing Events from/to file channel. In memory channel, the is plainly stored in RAM, so no serialization is required.
• A Small CPU overhead per disk write in determining the disk location where it needs to write. Typically this is backed by swap file. So you won't see this per event. But would see the CPU spikes when the moving from physical to swap.

So this increase are not entirely unexpected. However, you should look closer if this increase in CPU are high enough to slow down the system.

[Bigdata] Flume file channel CPU consumption is higher than memory channel reason