From f38f4ba78bb2559e3e8089784fa034f3fcf67f1b Mon Sep 17 00:00:00 2001 From: Heikki Linnakangas Date: Fri, 22 Jan 2021 22:59:29 +0200 Subject: [PATCH v3 3/3] Fix sizing of tape read buffers. --- src/backend/utils/sort/tuplesort.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/backend/utils/sort/tuplesort.c b/src/backend/utils/sort/tuplesort.c index 14104643e78..aff2f201f52 100644 --- a/src/backend/utils/sort/tuplesort.c +++ b/src/backend/utils/sort/tuplesort.c @@ -2658,7 +2658,7 @@ merge_read_buffer_size(int64 avail_mem, int nInputTapes, int nInputRuns, * we derive the input buffer size from the amount of memory available, * and M and N. */ - return (avail_mem - TAPE_BUFFER_OVERHEAD * nOutputTapes) / nInputTapes; + return Max((avail_mem - TAPE_BUFFER_OVERHEAD * nOutputTapes) / nInputTapes, 0); } /* -- 2.29.2