select 
  set,scale,tests.test,clients,round(tps) as tps,
  checkpoints_timed+checkpoints_req as chkpts,
  buffers_checkpoint as buf_check,
  buffers_clean as buf_clean,
  buffers_backend as buf_backend,
  buffers_alloc as buf_alloc ,
  buffers_backend_fsync as backend_sync
from test_bgwriter right join tests on tests.test=test_bgwriter.test 
order by scale,set,clients,test;