In src/include/pgstat.h, the PGSTAT_NUM_TABENTRIES macro attempts to subtract off the size of the PgStat_MsgTabstat struct up to the m_entry[] field. This macro was correct up until the fields m_block_read_time and m_block_write_time were added to that struct, as the macro was not changed to include their size.
This patch fixes the macro. As an aside, the PGSTAT_MSG_PAYLOAD define from which these field sizes are being subtracted is a bit of a WAG, if I am reading the code correctly, in which case whether the two additional fields are subtracted from that WAG is perhaps not critical. But the code is certainly easier to understand if the macro matches the definition of the struct. Mark Dilger
fix_PGSTAT_NUM_TABENTRIES_macro
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