disable/enable
(gdb) info b
Num Type Disp Enb Address What
1 breakpoint keep y 0x0000000000a3c27a in InvalidateCatalogSnapshot at snapmgr.c:566
breakpoint already hit 3 times
2 breakpoint keep y 0x00000000004e9fc6 in systable_beginscan at genam.c:361
(gdb) disable b 1
(gdb) enable b 1