how write in cassandra works in terms of commitlog_segment_size_in_mb

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mukesh.modi.india_53022 asked · Nov 11, 2019 at 02:15 PM

how write in cassandra works in terms of commitlog_segment_size_in_mb

Hi Team,

We caught the error "Mutation of 17156436 bytes is too large for the maximum size of 16777216" in Cassandra.

I understand, we should increase the commitlog_segment_size_in_mb to 64 mb as mutation usually use 1/2 of commilog_segment_size and we were using 32 mb.

Now, I understand, how commitlog_segment_size_in_mb works.

Is it because the size of writes has increased, or is it because commitlog has increased because the size of writes went high? I mean multiple writes in commitlog or one write request which has more than 16mb of size.

Thanks in advance.

Cheers,

Mukesh kumar

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Answer 1 · 2019-12-28T03:31:06Z

Erick Ramirez answered · Dec 28, 2019 at 03:31 AM

@mukesh.modi.india_53022 you are getting that error because the application is sending a really large write. We do not recommend increasing the commitlog segment size unless you fully understand the implications. Cheers!

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