*/
    public long getDefaultMaximumHeapSize(long osTotalMemory) {
        if (isIbmJvm()) {
            long totalMemoryHalf = osTotalMemory / 2;
            long halfGB = MemoryAmount.parseNotation("512m");
            return totalMemoryHalf > halfGB ? halfGB : totalMemoryHalf;
        }

        long totalMemoryFourth = osTotalMemory / 4;
        long oneGB = MemoryAmount.parseNotation("1g");

----

To increase the limit to e.g. 512K watches run the following:

[source,bash]
----
echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf
----
[source,bash]
----
sudo sysctl -p --system
----

Each used inotify watch takes up to 1KB of memory.
Assuming inotify uses all the 512K watches then file system watching could use up to 500MB.

        ruleFile = ruleStoreDir.file("stored.rules").asFile
    }

    test {
        // Looks like loading all the classes requires more than the default 512M
        maxHeapSize = "1g"

        // Only use one fork, so freezing doesn't have concurrency issues
        maxParallelForks = 1

        inputs.dir(ruleStoreDir)

    testImplementation 'junit:junit:4.13'
}

// tag::adjust-memory[]
tasks.withType(ScalaCompile) {
    scalaCompileOptions.forkOptions.with {
        memoryMaximumSize = '1g'
        jvmArgs = ['-XX:MaxMetaspaceSize=512m']
    }
}

    /**
     * Number of bytes processed so far mod. 2 power of 64.
     */
    private long count;

    /**
     * 512 bits input buffer = 16 x 32-bit words holds until reaches 512 bits.
     */
    private byte[] buffer = new byte[BLOCK_LENGTH];

    /**
     * 512 bits work buffer = 16 x 32-bit words
     */
    private int[] X = new int[16];


// Constructors

// 64 bytes, provides 256-bit security against all attacks.  The Keccak team
// recommends it for most applications upgrading from SHA2-512. (NIST chose a
// much stronger, but much slower, sponge instance for SHA3-512.)
//
// The SHA-3 functions are "drop-in" replacements for the SHA-2 functions.
// They produce output of the same length, with the same security strengths

        // Create a WorkQueue with process isolation
        val workQueue = workerExecutor.processIsolation() {
            // Configure the options for the forked process
            forkOptions {
                maxHeapSize = "512m"
                systemProperty("org.gradle.sample.showFileSize", "true")
            }
        }

        // Create and submit a unit of work for each file
        source.forEach { file ->

    }

    private static void setMemoryForWorkers(Project project) {
        project.getTasks().withType(DokkatooGenerateTask.class).configureEach(task -> {
            task.getWorkerMinHeapSize().set("512m");
            task.getWorkerMaxHeapSize().set("2g");
        });
    }

    private static void setStyling(Project project, GradleDocumentationExtension extension) {

            // Configure the options for the forked process
            forkOptions { JavaForkOptions options ->
                options.maxHeapSize = "512m"
                options.systemProperty "org.gradle.sample.showFileSize", "true"
            }
        }

        // Create and submit a unit of work for each file
        source.each { file ->

			"deckSize is impractically large",
			1 << 27,
			2,
			fmt.Errorf("deckSize 134217728 is impractically large"),
		},
		{
			"required entropy bits is greater than MaxHashBits",
			512,
			8,
			fmt.Errorf("required entropy bits of deckSize 512 and handSize 8 is greater than 60"),
		},
		{
			"deckSize: 1024 handSize: 6",
			1024,
			6,
			nil,
		},
	}
	for _, test := range tests {