add db migration 11, optimizing index count

internal/repository/migration.go

@@ -21,10 +21,11 @@ import (
 // is added to internal/repository/migrations/sqlite3/.
 //
 // Version history:
-//   - Version 10: Current version
+//   - Version 11: Optimize job table indexes (reduce from ~78 to 48)
+//   - Version 10: Node table
 //
 // Migration files are embedded at build time from the migrations directory.
-const Version uint = 10
+const Version uint = 11
 
 //go:embed migrations/*
 var migrationFiles embed.FS

internal/repository/migrations/sqlite3/11_optimize-indexes.down.sql

@@ -0,0 +1,56 @@
+-- Migration 11 DOWN: Restore indexes from migration 09
+
+-- ============================================================
+-- Recreate all removed indexes from migration 09
+-- ============================================================
+
+-- Cluster+Partition Filter Sorting
+CREATE INDEX IF NOT EXISTS jobs_cluster_partition_numnodes ON job (cluster, cluster_partition, num_nodes);
+CREATE INDEX IF NOT EXISTS jobs_cluster_partition_numhwthreads ON job (cluster, cluster_partition, num_hwthreads);
+CREATE INDEX IF NOT EXISTS jobs_cluster_partition_numacc ON job (cluster, cluster_partition, num_acc);
+CREATE INDEX IF NOT EXISTS jobs_cluster_partition_energy ON job (cluster, cluster_partition, energy);
+
+-- Cluster+JobState Filter Sorting
+CREATE INDEX IF NOT EXISTS jobs_cluster_jobstate_numnodes ON job (cluster, job_state, num_nodes);
+CREATE INDEX IF NOT EXISTS jobs_cluster_jobstate_numhwthreads ON job (cluster, job_state, num_hwthreads);
+CREATE INDEX IF NOT EXISTS jobs_cluster_jobstate_numacc ON job (cluster, job_state, num_acc);
+CREATE INDEX IF NOT EXISTS jobs_cluster_jobstate_energy ON job (cluster, job_state, energy);
+
+-- Cluster+Shared Filter Sorting
+CREATE INDEX IF NOT EXISTS jobs_cluster_shared_numnodes ON job (cluster, shared, num_nodes);
+CREATE INDEX IF NOT EXISTS jobs_cluster_shared_numhwthreads ON job (cluster, shared, num_hwthreads);
+CREATE INDEX IF NOT EXISTS jobs_cluster_shared_numacc ON job (cluster, shared, num_acc);
+CREATE INDEX IF NOT EXISTS jobs_cluster_shared_energy ON job (cluster, shared, energy);
+
+-- User Filter Sorting
+CREATE INDEX IF NOT EXISTS jobs_user_numnodes ON job (hpc_user, num_nodes);
+CREATE INDEX IF NOT EXISTS jobs_user_numhwthreads ON job (hpc_user, num_hwthreads);
+CREATE INDEX IF NOT EXISTS jobs_user_numacc ON job (hpc_user, num_acc);
+CREATE INDEX IF NOT EXISTS jobs_user_energy ON job (hpc_user, energy);
+
+-- Project Filter Sorting
+CREATE INDEX IF NOT EXISTS jobs_project_numnodes ON job (project, num_nodes);
+CREATE INDEX IF NOT EXISTS jobs_project_numhwthreads ON job (project, num_hwthreads);
+CREATE INDEX IF NOT EXISTS jobs_project_numacc ON job (project, num_acc);
+CREATE INDEX IF NOT EXISTS jobs_project_energy ON job (project, energy);
+
+-- JobState Filter Sorting
+CREATE INDEX IF NOT EXISTS jobs_jobstate_numnodes ON job (job_state, num_nodes);
+CREATE INDEX IF NOT EXISTS jobs_jobstate_numhwthreads ON job (job_state, num_hwthreads);
+CREATE INDEX IF NOT EXISTS jobs_jobstate_numacc ON job (job_state, num_acc);
+CREATE INDEX IF NOT EXISTS jobs_jobstate_energy ON job (job_state, energy);
+
+-- Shared Filter Sorting
+CREATE INDEX IF NOT EXISTS jobs_shared_numnodes ON job (shared, num_nodes);
+CREATE INDEX IF NOT EXISTS jobs_shared_numhwthreads ON job (shared, num_hwthreads);
+CREATE INDEX IF NOT EXISTS jobs_shared_numacc ON job (shared, num_acc);
+CREATE INDEX IF NOT EXISTS jobs_shared_energy ON job (shared, energy);
+
+-- ArrayJob Filter
+CREATE INDEX IF NOT EXISTS jobs_cluster_arrayjobid_starttime ON job (cluster, array_job_id, start_time);
+
+-- Backup Indices For High Variety Columns
+CREATE INDEX IF NOT EXISTS jobs_duration ON job (duration);
+
+-- Optimize DB index usage
+PRAGMA optimize;

internal/repository/migrations/sqlite3/11_optimize-indexes.up.sql

@@ -0,0 +1,61 @@
+-- Migration 11: Remove overly specific table indexes formerly used in sorting
+-- When one or two indexed columns are used, sorting usually is fast
+-- Reduces from ~78 indexes to 48 for better write performance,
+-- reduced disk usage, and more reliable query planner decisions.
+-- Requires ANALYZE to be run after migration (done automatically on startup).
+
+-- ============================================================
+-- Drop SELECTED existing job indexes (from migrations 08/09)
+-- sqlite_autoindex_job_1 (UNIQUE constraint) is kept automatically
+-- ============================================================
+
+-- Cluster+Partition Filter Sorting
+DROP INDEX IF EXISTS jobs_cluster_partition_numnodes;
+DROP INDEX IF EXISTS jobs_cluster_partition_numhwthreads;
+DROP INDEX IF EXISTS jobs_cluster_partition_numacc;
+DROP INDEX IF EXISTS jobs_cluster_partition_energy;
+
+-- Cluster+JobState Filter Sorting
+DROP INDEX IF EXISTS jobs_cluster_jobstate_numnodes;
+DROP INDEX IF EXISTS jobs_cluster_jobstate_numhwthreads;
+DROP INDEX IF EXISTS jobs_cluster_jobstate_numacc;
+DROP INDEX IF EXISTS jobs_cluster_jobstate_energy;
+
+-- Cluster+Shared Filter Sorting
+DROP INDEX IF EXISTS jobs_cluster_shared_numnodes;
+DROP INDEX IF EXISTS jobs_cluster_shared_numhwthreads;
+DROP INDEX IF EXISTS jobs_cluster_shared_numacc;
+DROP INDEX IF EXISTS jobs_cluster_shared_energy;
+
+-- User Filter Sorting
+DROP INDEX IF EXISTS jobs_user_numnodes;
+DROP INDEX IF EXISTS jobs_user_numhwthreads;
+DROP INDEX IF EXISTS jobs_user_numacc;
+DROP INDEX IF EXISTS jobs_user_energy;
+
+-- Project Filter Sorting
+DROP INDEX IF EXISTS jobs_project_numnodes;
+DROP INDEX IF EXISTS jobs_project_numhwthreads;
+DROP INDEX IF EXISTS jobs_project_numacc;
+DROP INDEX IF EXISTS jobs_project_energy;
+
+-- JobState Filter Sorting
+DROP INDEX IF EXISTS jobs_jobstate_numnodes;
+DROP INDEX IF EXISTS jobs_jobstate_numhwthreads;
+DROP INDEX IF EXISTS jobs_jobstate_numacc;
+DROP INDEX IF EXISTS jobs_jobstate_energy;
+
+-- Shared Filter Sorting
+DROP INDEX IF EXISTS jobs_shared_numnodes;
+DROP INDEX IF EXISTS jobs_shared_numhwthreads;
+DROP INDEX IF EXISTS jobs_shared_numacc;
+DROP INDEX IF EXISTS jobs_shared_energy;
+
+-- ArrayJob Filter
+DROP INDEX IF EXISTS jobs_cluster_arrayjobid_starttime;
+
+-- Backup Indices For High Variety Columns
+DROP INDEX IF EXISTS jobs_duration;
+
+-- Optimize DB index usage
+PRAGMA optimize;