[jira] [Commented] (BEAM-9822) SpannerIO: Reduce memory usage - especially when streaming

["Kyle Weaver (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BEAM-9822?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17093723#comment-17093723 ] 

Kyle Weaver commented on BEAM-9822:
-----------------------------------

Marking fix version as 2.21 indicates that this issue should block the release. Since the 2.21 release is already in progress, please either remove the fix version or provide some justification as to why this is a blocking change (usually blocking changes are limited to regressions).

> 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: 20m
>  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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