**Reported in Launchpad by Andrey Galkin last update 11-07-2016 13:12:21
Steps to reproduce:
S1. Create a low memory VM e.g. <1GB (alternatively, limit with ulimit/cgroup)
S2. Make sure swap is off
S3. Create full backup + incremental backup
S4. Try to restore
S5. See a failure on incremental:
Applying /db/mysql_mysrv1/data.incremental/ibdata1.delta to ./ibdata1...
InnoDB: Retry attempts for reading partial data failed.
InnoDB: Tried to read 16384 bytes at offset 0 was only able to read0
InnoDB: Operating system error number 14 in a file operation.
InnoDB: Error number 14 means 'Bad address'
What is expected:
W1. Make sure out-of-memory error is properly reported (check malloc() return)
W2. Use smaller buffer of 64MB as before or even less, do not use UNIV_PAGE_SIZE_MAX in calculations
W3. Obey --use-memory as much as possible
D1. xtrabackup.cc:5844 (https://github.com/percona/percona-xtrabackup/blob/2.4/storage/innobase/xtrabackup/src/xtrabackup.cc#L5844)
incremental_buffer_base = static_cast<byte *>
(ut_malloc_nokey((UNIV_PAGE_SIZE_MAX / 4 + 1) *
incremental_buffer = static_cast<byte *>
D2. incremental_buffer_base & incremental_buffer are NOT checked other than for ut_free()
D3. UNIV_PAGE_SIZE_MAX has changed due to change of UNIV_PAGE_SIZE_SHIFT_MAX from 14 to 16 in rev 717b4b2e
#define UNIV_PAGE_SIZE_MAX (1 << UNIV_PAGE_SIZE_SHIFT_MAX)
D4. Consequences memory usage for the buffer raised from ~64MB to ~1GB