High CPU usage by database LMHB process on 8-socket Exadata database servers running Exadata 19.x
(Doc ID 2682191.1)
Last updated on JULY 28, 2020
Applies to:
Exadata Database Machine X2-8 - Version All Versions and laterOracle Exadata Storage Server Software - Version 19.3.0.0.0 to 19.3.6.0.0 [Release 12.2]
Oracle Exadata Storage Server Software - Version 19.1.0.0.0 to 19.2.15.0.0 [Release 12.2]
Exadata X7-8 Hardware - Version All Versions and later
Exadata Database Machine X8-8/X8M-8 Hardware - Version All Versions and later
Information in this document applies to any platform.
Symptoms
Exadata 8-socket database servers running Oracle Linux 7 (Exadata 19.x) have unnecessarily high CPU usage by database process LMHB. The impact is more pronounced with higher number of databases. A system affected by this issue experienced 40% CPU utilization with 120 running databases with no application workload.
Cause
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In this Document
| Symptoms |
| Cause |
| Solution |
| References |