(page-merge-par) begin
(page-merge-par) init
(page-merge-par) sort chunk 0
(page-merge-par) sort chunk 1
(page-merge-par) sort chunk 2
(page-merge-par) sort chunk 3
(page-merge-par) sort chunk 4
(page-merge-par) sort chunk 5
(page-merge-par) sort chunk 6
(page-merge-par) sort chunk 7
(page-merge-par) merge
(page-merge-par) verify
(page-merge-par) success, buf_idx=516096
(page-merge-par) end