What? My config file doesn’t have hashstore entries. I need a little guide on how to adjust the compression. It seems a bit light right now. Here is an explanation but you need the values
# if the log file is not this alive, compact it
hashstore.compaction.alive-fraction: 0.6
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I would like to recover space. If I insert these parameters into my config file, will I be able to do so?
hashstore.compaction.alive-fraction: 0.35
hashstore.compaction.rewrite-multiple: 1
hashstore.compaction.probability-power: 2.0
The key setting when it comes to saving space is hashstore.compaction.alive-fraction. The default of 0.25 is very lazy. I am using 0.6. This is afaik what they use on select.
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… the higher number makes it reclaim space harder?
From what I understand, the higher the number, the less reclaimable space there is and more free space.
Higher number for hashstore.compaction.alive-fraction means compaction will be triggered more often. Therefore higher number = less wasted (reclaimable) space. On the downside you will see more disk activity.
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