GetTotalSwapSpaceSize is not available – 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 total swap space size on your system. This could be due to insufficient permissions or an unsupported operating system. To resolve this issue, you can try running OpenSearch with administrative privileges or check if your operating system is compatible with OpenSearch. If the problem persists, consider disabling the memory check by setting the bootstrap.memory_lock to false in the OpenSearch configuration file. However, be aware that this could lead to performance issues.

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This guide will help you check for common problems that cause the log ” getTotalSwapSpaceSize is not available ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: monitor.

Log Context

Log “getTotalSwapSpaceSize is not available” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :

     * Returns the total amount of swap space in bytes.
    public long getTotalSwapSpaceSize() {
        if (getTotalSwapSpaceSize == null) {
            logger.warn("getTotalSwapSpaceSize is not available");
            return 0;
        try {
            final long mem = (long) getTotalSwapSpaceSize.invoke(osMxBean);
            if (mem 


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