Add new vpl_num_allocated_pages member to VPageListData.

It will keep track the number of pages allocated so that
vacuum could allocate twice of the previous allocation.
This will greatly reduce the total memory consumption of
vacuum.

diff --git a/src/include/commands/vacuum.h b/src/include/commands/vacuum.h
index aa6340b648d181886121e39686158c416724e2e2..d4fc66bf68117ee17e14671adc4f4ae7efb89153 100644 (file)
--- a/src/include/commands/vacuum.h
+++ b/src/include/commands/vacuum.h
@@ -46,6 +46,7 @@ typedef struct VPageListData
 {
        int                     vpl_empty_end_pages;    /* Number of "empty" end-pages */
        int                     vpl_num_pages;  /* Number of pages in vpl_pagedesc */
+       int                     vpl_num_allocated_pages;        /* Number of allocated pages in vpl_pagedesc */
        VPageDescr *vpl_pagedesc;       /* Descriptions of pages */
 } VPageListData;