2.27%  postgres  postgres            [.] AllocSetAlloc
     0.59%  postgres  postgres            [.] pfree
     0.44%  postgres  postgres            [.] MemoryContextAllocZero
     0.39%  postgres  postgres            [.] palloc
     0.34%  postgres  postgres            [.] MemoryContextAllocZeroAligned
     0.27%  postgres  postgres            [.] palloc0
     0.17%  postgres  postgres            [.] AllocSetAllocCarveOldAndAlloc
     0.09%  postgres  postgres            [.] MemoryContextAlloc
     0.02%  postgres  postgres            [.] AllocSetAllocLarge
     0.01%  postgres  postgres            [.] AllocSetAllocFromNewBlock