docs: update launch capacity and postgres tuning

scripts/lib/postgres-tuning-profile.js

@@ -131,6 +131,45 @@ export const postgresTuningProfiles = {
         type: 'duration',
         rationale: 'Ordinary API requests should not wait a long time behind locks.',
       },
+      temp_file_limit: {
+        recommended: '4GB',
+        min: '1GB',
+        max: '8GB',
+        type: 'bytes',
+        rationale: 'Bound accidental large sorts/hash spills from reports or imports on a shared host.',
+      },
+      log_temp_files: {
+        recommended: '128MB',
+        min: '64MB',
+        max: '512MB',
+        type: 'bytes',
+        rationale: 'Log large temp-file spills during launch without logging every tiny sort.',
+      },
+      log_checkpoints: {
+        recommended: 'on',
+        exact: 'on',
+        type: 'text',
+        rationale: 'Checkpoint logs help correlate latency spikes with WAL/checkpoint pressure.',
+      },
+      track_io_timing: {
+        recommended: 'on',
+        exact: 'on',
+        type: 'text',
+        rationale: 'Required to diagnose read/write I/O time for real-data benchmark bottlenecks.',
+      },
+      track_wal_io_timing: {
+        recommended: 'on',
+        exact: 'on',
+        type: 'text',
+        rationale: 'Required to diagnose WAL fsync/write pressure during answer/order/import writes.',
+      },
+      max_parallel_workers_per_gather: {
+        recommended: '1',
+        min: 0,
+        max: 2,
+        type: 'number',
+        rationale: 'Keep OLTP API requests from consuming too many workers per query on 4 vCPU.',
+      },
     },
   },
   'dedicated-db': {
@@ -156,6 +195,12 @@ export const postgresTuningProfiles = {
       idle_in_transaction_session_timeout: { recommended: '60s', min: '30s', max: '120s', type: 'duration' },
       statement_timeout: { recommended: '30s', min: '5s', max: '60s', type: 'duration' },
       lock_timeout: { recommended: '5s', min: '1s', max: '10s', type: 'duration' },
+      temp_file_limit: { recommended: '8GB', min: '2GB', max: '12GB', type: 'bytes' },
+      log_temp_files: { recommended: '128MB', min: '64MB', max: '512MB', type: 'bytes' },
+      log_checkpoints: { recommended: 'on', exact: 'on', type: 'text' },
+      track_io_timing: { recommended: 'on', exact: 'on', type: 'text' },
+      track_wal_io_timing: { recommended: 'on', exact: 'on', type: 'text' },
+      max_parallel_workers_per_gather: { recommended: '2', min: 0, max: 2, type: 'number' },
     },
   },
 };