docs: added missing metrics to README

Author: casperr0

README.rst

@@ -251,23 +251,27 @@ Metrics:  PostgreSQL
     'PostgreSQL: size of files need to archive': pgsql.archive_command[size_files_to_archive]
     'PostgreSQL: count archived files': pgsql.archive_command[archived_files]
     'PostgreSQL: count attempts to archive files': pgsql.archive_command[failed_trying_to_archive]
-    'PostgreSQL checkpoint: by timeout (in hour)': pgsql.checkpoint[count_timed]
-    'PostgreSQL checkpoint: by wal (in hour)': pgsql.checkpoint[count_wal]
-    'PostgreSQL checkpoint: write time': pgsql.checkpoint[write_time]
-    'PostgreSQL checkpoint: sync time': pgsql.checkpoint[checkpoint_sync_time]
+    'PostgreSQL: checkpoint by timeout (in hour)': pgsql.checkpoint[count_timed]
+    'PostgreSQL: checkpoint by wal (in hour)': pgsql.checkpoint[count_wal]
+    'PostgreSQL: checkpoint write time': pgsql.checkpoint[write_time]
+    'PostgreSQL: checkpoint sync time': pgsql.checkpoint[checkpoint_sync_time]
+    'PostgreSQL: shared buffer dirty size': pgsql.buffers[dirty]
+    'PostgreSQL: shared buffer size': pgsql.buffers[size]
+    'PostgreSQL: shared buffer twice used size': pgsql.buffers[twice_used]
     'PostgreSQL bgwriter: buffers written during checkpoints': pgsql.bgwriter[buffers_checkpoint]
     'PostgreSQL bgwriter: buffers written': pgsql.bgwriter[buffers_clean]
     'PostgreSQL bgwriter: number of bgwriter stopped by max write count': pgsql.bgwriter[maxwritten_clean]
     'PostgreSQL bgwriter: buffers written directly by a backend': pgsql.bgwriter[buffers_backend]
     'PostgreSQL bgwriter: times a backend execute its own fsync': pgsql.bgwriter[buffers_backend_fsync]
     'PostgreSQL bgwriter: buffers allocated': pgsql.bgwriter[buffers_alloc]
     'PostgreSQL: count of autovacuum workers': pgsql.autovacumm.count[]
-    'PostgreSQL transactions: total': pgsql.transactions[total]
-    'PostgreSQL blocks: hit': pgsql.blocks[hit]
-    'PostgreSQL blocks: read': pgsql.blocks[read]
+    'PostgreSQL: transactions total': pgsql.transactions[total]
+    'PostgreSQL: blocks hit': pgsql.blocks[hit]
+    'PostgreSQL: blocks read': pgsql.blocks[read]
     'PostgreSQL event: conflicts': pgsql.events[conflicts]
     'PostgreSQL event: deadlocks': pgsql.events[deadlocks]
     'PostgreSQL event: rollbacks': pgsql.events[xact_rollback]
+    'PostgreSQL event: checksum_failures': pgsql.events[checksum_failures]
     'PostgreSQL temp: bytes written': pgsql.temp[bytes]
     'PostgreSQL temp: files created': pgsql.temp[files]
     'PostgreSQL tuples: deleted': pgsql.tuples[deleted]