Re: Add pgstathashindex() to get hash index table statistics.

On Fri, Jan 6, 2017 at 6:58 PM, Ashutosh Sharma <ashu(dot)coek88(at)gmail(dot)com> wrote:

I've successfully applied the patch on the latest head and ran a
regression tests without any failure. There is no major changes.
However, I've some minor comments on the patch:

+/*
+ * HASH_ALLOCATABLE_PAGE_SZ represents allocatable
+ * space (pd_upper - pd_lower) on a hash page.
+ */
+#define HASH_ALLOCATABLE_PAGE_SZ \
+ BLCKSZ - \
+ (SizeOfPageHeaderData + sizeof(HashPageOpaqueData))
My suggestion will be not to write "(pd_upper - pd_lower)" in the
comment. You may write allocatable space on a empty hash page.

+ buf = ReadBufferExtended(rel, MAIN_FORKNUM, blkno,
RBM_NORMAL, NULL);
Use BAS_BULKREAD strategy to read the buffer.

--
Thanks & Regards,
Kuntal Ghosh
EnterpriseDB: http://www.enterprisedb.com