Lo que hace posible perder significa en valgrind

Tengo muchas posibles entradas perdidas de valgrind. Qué significa eso ? Como estoy usando sqlite y está bien probado. No creo que sean entradas correctas. Que estoy haciendo mal

 16 bytes in 1 blocks are possibly lost in loss record 30 of 844
    ==23027==    at 0x4A05E1C: malloc (vg_replace_malloc.c:195)
    ==23027==    by 0x6525BE: sqlite3MemMalloc (in app_mem.out)
    ==23027==    by 0x63C579: mallocWithAlarm (in app_mem.out)
    ==23027==    by 0x63C904: sqlite3DbMallocRaw (in app_mem.out)
    ==23027==    by 0x6886D6: codeOneLoopStart (in app_mem.out)
    ==23027==    by 0x68A9C8: sqlite3WhereBegin (in app_mem.out)
    ==23027==    by 0x68CC9E: sqlite3Select (in app_mem.out)
    ==23027==    by 0x6A8644: yy_reduce (in app_mem.out)
    ==23027==    by 0x6AAEAC: sqlite3Parser (in app_mem.out)
    ==23027==    by 0x6AB357: sqlite3RunParser (in app_mem.out)
    ==23027==    by 0x6ADF84: sqlite3Prepare (in app_mem.out)
    ==23027==    by 0x6AE82B: sqlite3LockAndPrepare (in app_mem.out)