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https://issues.apache.org/jira/browse/BEAM-9822?focusedWorklogId=428613&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-428613
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ASF GitHub Bot logged work on BEAM-9822:
----------------------------------------
Author: ASF GitHub Bot
Created on: 29/Apr/20 15:20
Start Date: 29/Apr/20 15:20
Worklog Time Spent: 10m
Work Description: nielm opened a new pull request #11570:
URL: https://github.com/apache/beam/pull/11570
There is minimal benefit in separating these 2 stages, and significant
benefity in merging them: Gather and Sort encodes incoming
MutationGroups into a List<byte[]> which would contain up to 1GB.
This is then output (copied) to the CreateBatches where it is decoded
back into MutationGroups.
Removing this encode/decode should save up to 2GB of RAM.
Note, this PR is dependent on PR #11528, PR #11532 and PR #11529
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Issue Time Tracking
-------------------
Worklog Id: (was: 428613)
Time Spent: 0.5h (was: 20m)
> SpannerIO: Reduce memory usage - especially when streaming
> ----------------------------------------------------------
>
> Key: BEAM-9822
> URL: https://issues.apache.org/jira/browse/BEAM-9822
> Project: Beam
> Issue Type: Bug
> Components: io-java-gcp
> Affects Versions: 2.20.0
> Reporter: Niel Markwick
> Priority: Major
> Labels: google-cloud-spanner
> Fix For: 2.21.0
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> SpannerIO uses a lot of memory.
> In Streaming Dataflow, it uses many times as much (because dataflow creates
> many worker threads)
> Lower the memory use, and change default parameters during streaming to use
> smaller batches and disable grouping.
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