On 17/05/18 00:56, Alexander Korotkov wrote:
On Wed, May 16, 2018 at 10:41 PM, Andres Freund <and...@anarazel.de> wrote:

Generally ok, two minor points:

diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index 7cd2d2d80e..93402030f7 100644
       {"TB", GUC_UNIT_BLOCKS, (1024 * 1024 * 1024) / (BLCKSZ / 1024)},
       {"GB", GUC_UNIT_BLOCKS, (1024 * 1024) / (BLCKSZ / 1024)},
       {"MB", GUC_UNIT_BLOCKS, 1024 / (BLCKSZ / 1024)},
       {"kB", GUC_UNIT_BLOCKS, -(BLCKSZ / 1024)},
+     {"B", GUC_UNIT_BLOCKS, -(BLCKSZ / (1024 * 1024))},

Isn't this 0 in the common case of 8k pages?

       {"TB", GUC_UNIT_XBLOCKS, (1024 * 1024 * 1024) / (XLOG_BLCKSZ /
1024)},
       {"GB", GUC_UNIT_XBLOCKS, (1024 * 1024) / (XLOG_BLCKSZ / 1024)},
       {"MB", GUC_UNIT_XBLOCKS, 1024 / (XLOG_BLCKSZ / 1024)},
       {"kB", GUC_UNIT_XBLOCKS, -(XLOG_BLCKSZ / 1024)},
+     {"B", GUC_UNIT_XBLOCKS, -(XLOG_BLCKSZ / (1024 * 1024))},

Same?

As I understand, in these cases multiplier should be just -BLCKSZ and
-XLOG_BLCKSZ correspondingly.

Yep, quite right. Fixed and committed, thanks!

- Heikki

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