Exadata: DB Processes Stuck In "rds_ib_flush_mr_pool" although there is no CPU/memory Load.
(Doc ID 2622510.1)
Last updated on MAY 20, 2021
Applies to:Linux OS - Version Oracle Linux 7.6 to Oracle Linux 7.6 [Release OL7U6]
Exadata: A number of DB processes going to D state with wchan value "rds_ib_flush_mr_pool", although there is no CPU/memory load.
The PID stack is as follows:
=== STACK ===  rds_ib_flush_mr_pool+0x35d/0x790 [rds_rdma]  rds_ib_flush_mrs+0x5a/0x80 [rds_rdma]  rds_rdma_drop_keys+0x164/0x190 [rds]  rds_release+0x8f/0x100 [rds]  sock_release+0x25/0x90  sock_close+0x12/0x20  __fput+0xe7/0x220  ____fput+0xe/0x10  task_work_run+0xba/0x100  do_notify_resume+0x8d/0xa0  ksplice_do_notify_resume+0x1c/0x40 [ksplice_b990zaf2_vmlinux_new]  0xffffffffffffffff
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