Today fought with error in alert log (Database 12.1.0.2.11 on Exadata, image 12.1.2.1.2):
ORA-00600:
internal error code, arguments: [ossnet_assign_msgid_1], [], [], [], [], [],
[], [], [], [], []
ERROR:
unrecoverable error ORA-600 raised in ASM I/O path
MOS found nothing direct links about this error.
As of note " 12.1.0.2 Bundle Patches for Engineered Systems and DB In-Memory - List of Fixes in each Bundle (Doc ID 1937782.1) "
this is the bug:
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ORA-600
[OSSNET_ASSIGN_MSGID_1] CAUSED BY TO SMALL VALUE _SMM_AUTO_MIN_IO_SIZE
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The solution which helped to us:
alter
system set "_smm_auto_max_io_size"=2048 scope=both sid='*';
alter
system set "_smm_auto_min_io_size"=2040 scope=both sid='*';
