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Exadata: DB Processes Stuck In "rds_ib_flush_mr_pool" although there is no CPU/memory Load. (Doc ID 2622510.1)

Last updated on AUGUST 18, 2020

Applies to:

Linux OS - Version Oracle Linux 7.6 to Oracle Linux 7.6 [Release OL7U6]
Linux x86-64

Symptoms

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

Cause

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In this Document
Symptoms
Cause
Solution
References


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