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adjust compaction strategy

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Signed-off-by: Alex Chi <chi@neon.tech>
This commit is contained in:
Alex Chi
2023-06-26 15:52:37 -04:00
parent 43d564ce0a
commit 30e7ffcd28
1 changed files with 5 additions and 3 deletions
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8
pageserver/src/tenant/timeline.rs
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@@ -3747,7 +3747,7 @@ impl Timeline {
}
fn get_compact_task(tier_sizes: Vec<(usize, u64)>) -> Option<Vec<usize>> {
let size_ratio = 1.0;
let size_ratio = 1.25;
let space_amplification_ratio = 2.0;
// Trigger 1: by space amplification, do full compaction
@@ -3768,7 +3768,7 @@ impl Timeline {
let mut total_size_up_to_lvl = 0;
let mut compact_tiers = Vec::new();
for (tier_id, size) in tier_sizes {
if total_size_up_to_lvl != 0 && total_size_up_to_lvl as f64 / size as f64 > size_ratio {
if total_size_up_to_lvl != 0 && size as f64 / total_size_up_to_lvl as f64 > size_ratio {
info!("compaction triggered by size ratio");
return Some(compact_tiers);
}
@@ -3813,7 +3813,9 @@ impl Timeline {
println!("tier_to_compact: {tier_to_compact:?}");
if tier_to_compact.len() < 2 {
let min_merge_width = 3;
if tier_to_compact.len() < min_merge_width {
return Ok(None);
}