Briefly, this error occurs when Elasticsearch is unable to lock the memory, due to the RLIMIT_MEMLOCK setting being too low. This can lead to swapping, which can degrade Elasticsearch performance. To resolve this issue, you can increase the RLIMIT_MEMLOCK limit in the operating system settings. Alternatively, you can disable memory swapping altogether, but this could potentially lead to out-of-memory errors. Another solution is to configure Elasticsearch to use a smaller heap size, which would reduce the amount of memory it needs to lock.
This guide will help you check for common problems that cause the log ” Increase RLIMIT_MEMLOCK (ulimit). ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: bootstrap.
Log Context
Log “Increase RLIMIT_MEMLOCK (ulimit).” classname is JNANatives.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
\t{} soft memlock unlimited
\t{} hard memlock unlimited"""; user; user; user);
logger.warn("If you are logged in interactively; you will have to re-login for the new limits to take effect.");
}
} else {
logger.warn("Increase RLIMIT_MEMLOCK (ulimit).");
}
}
}
static void trySetMaxNumberOfThreads() {
