feat: 문서 구조 변경 및 tech-visual 스킬 추가

2026-09-04 18:20:00 +09:00
parent 43901f0abf
commit 2efb7ee1f2
683 changed files with 61180 additions and 10479 deletions
@@ -0,0 +1,7 @@
+metric,precompute,single_or,note
+page1_unified_parents,20,20,keyset page — both parent paths return the same 20
+page1_unified_rows,60,60,LATERAL top-3 per parent (<=60)
+page1_buffers_shared_hit,63,181,env-dependent (relative only — warm cache)
+deep_keyset_parent_scanned,19,200,precompute index-range(19) vs BitmapOr + hashed mention SubPlan(200)
+deep_keyset_buffers_shared_hit,60,88,env-dependent (relative only — warm cache)
+viewer_visible_set,1500,1500,feed_visible count for user008 (= single-OR page-1 candidate set)
@@ -0,0 +1,4 @@
+N,collection_init,prepared_total,toone
+10,10,25,13
+100,100,222,120
+1000,1000,2022,1020
@@ -0,0 +1,8 @@
+rank,highlights
+1,500
+2,225
+3,141
+5,79
+10,35
+50,6
+100,3
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+K,window_rows,window_buffers,window_ms,lateral_rows,lateral_buffers,lateral_ms
+3,60,162,1.388,60,114,0.271
+50,695,216,1.540,695,155,0.908
+500,1509,269,2.905,1509,171,1.259
@@ -0,0 +1,3 @@
+variant,top_node,child_access,buffers_shared_hit,exec_ms
+with_index,Nested Loop,Index Scan using ix_highlights_feed_items_created (Limit 3),168,0.336
+without_index,Nested Loop,Seq Scan on highlights (Rows Removed by Filter 2842/loop),4446,5.472
@@ -0,0 +1,4 @@
+strategy,top_node,returned_rows,buffers_shared_hit,exec_ms
+window,WindowAgg (Subquery Scan on t),60,430,1.552
+lateral,Nested Loop (Index Scan + Limit 3),60,204,0.323
+twostep,Sort (Hash Semi Join),1509,430,1.686
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+strategy,returned_rows,parents_covered,max_per_parent
+window,60,20,3
+lateral,60,20,3
+twostep_full,1509,20,unbounded
+naive_wrong_limit3,3,1,3
@@ -0,0 +1,4 @@
+variant,top_node,returned_rows,scanned_rows,buffers_shared_hit,exec_ms
+offset,Limit<-Sort<-Seq Scan,20,2000,141,0.996
+keyset_with_index,Limit<-Index Only Scan,20,20,1,0.076
+keyset_without_index,Limit<-Sort<-Seq Scan (filter),20,20,141,0.373
@@ -0,0 +1,4 @@
+offset,page,offset_scanned,offset_buffers,keyset_scanned,keyset_buffers
+0,1,20,1,20,3
+980,50,1000,18,20,3
+1980,100,2000,106,20,2
@@ -0,0 +1,4 @@
+approach,top_node,sort,mentions_handling,candidate_rows,buffers_shared_hit,exec_ms
+single_or,Bitmap Heap Scan + top-N Sort,re-sort,hashed SubPlan,1500,122,0.808
+union_decompose,Merge Append (per-branch index),per-branch merge,Hash Join,,200,0.780
+precompute,Index Only Scan on feed_visible,none,pre-materialized,20,1,0.034
@@ -0,0 +1,4 @@
+N,page_fetch,user_fetch,entity_fetch,collection_init,prepared_total
+10,10,3,13,10,25
+100,100,20,120,100,222
+1000,1000,20,1020,1000,2022
@@ -0,0 +1,4 @@
+N,transferred_rows_join_card,list_size_hibernate6_dedup,distinct_items,seeded_highlights,blowup_x,prepared_total
+10,1285,10,10,1285,128.5,14
+100,1961,100,100,1961,19.6,121
+1000,2917,1000,1000,2917,2.9,1021
@@ -0,0 +1,4 @@
+N,p50_ms,p99_ms,thread_alloc_kb
+10,6.184,6.566,1582
+100,13.890,16.062,3061
+1000,79.452,83.526,10230
@@ -0,0 +1,4 @@
+N,returned_page,feed_item_loaded,over_fetch_x,seeded_highlights
+10,10,10,1.0,1285
+100,20,100,5.0,1961
+1000,20,1000,50.0,2917
@@ -0,0 +1,4 @@
+N,l1_prepared_before,l5_prepared_after,l1_collfetch_before,l5_collfetch_after,feed_item_loaded_page,collapse_x
+10,25,5,10,1,10,5.0
+100,222,5,100,1,20,44.4
+1000,2022,23,1000,10,20,87.9
@@ -0,0 +1,2 @@
+scope,page_size,entities_loaded
+page20_seed1000,20,1569
@@ -0,0 +1,3 @@
+plan,explain_width_estimate
+l6_parent_projection,2088
+l5_entity_paging,1194
@@ -0,0 +1,5 @@
+metric,before_l5_batch,after_l6_projection
+entities_loaded_page20_seed1000,1569,0
+prepared_n1000,23,2
+collection_fetch_n1000,10,0
+child_rows_page20_seed1000,1509,1509