Exception retrieving total physical memory – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when OpenSearch is unable to access the system’s physical memory information. This could be due to insufficient permissions, incorrect configuration, or an unsupported operating system. To resolve this issue, you can try running OpenSearch with administrative privileges, checking your system’s configuration for errors, or ensuring that your operating system is compatible with OpenSearch. Additionally, you may want to update your OpenSearch version to the latest one, as this could also be a bug that has been fixed in a newer release.

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This guide will help you check for common problems that cause the log ” exception retrieving total physical memory ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: memory, monitor.

Log Context

Log “exception retrieving total physical memory” classname is OsProbe.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :

                logger.debug("OS reported a negative total memory value [{}]"; totalMem);
                return 0;
            return totalMem;
        } catch (Exception e) {
            logger.warn("exception retrieving total physical memory"; e);
            return 0;



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