Patch adds cacheline padding around parts of XLogCtl.

Idea from way back, but never got performance tested in a situation
where WALInsertLock was the bottleneck.

So this is speculative, in need of testing to investigate value.

 Simon Riggs         
 PostgreSQL Development, 24x7 Support, Training & Services

Attachment: XLogInsert_cacheline_opt.v3.patch
Description: Binary data

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