> ## Documentation Index
> Fetch the complete documentation index at: https://docs.siderolabs.com/llms.txt
> Use this file to discover all available pages before exploring further.

> ZswapConfig is a zswap (compressed memory) configuration document. When zswap is enabled, Linux kernel compresses pages that would otherwise be swapped out to disk. The compressed pages are stored in a memory pool, which is used to avoid writing to disk when the system is under memory pressure.

# ZswapConfig

export const VersionWarningBanner = () => {
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  const [currentVersion, setCurrentVersion] = useState(null);
  const [isBeta, setIsBeta] = useState(false);
  const parseVersion = v => v.replace("v", "").split(".").map(Number);
  const isGreaterVersion = (a, b) => {
    const [aMajor, aMinor] = parseVersion(a);
    const [bMajor, bMinor] = parseVersion(b);
    if (aMajor > bMajor) return true;
    if (aMajor === bMajor && aMinor > bMinor) return true;
    return false;
  };
  useEffect(() => {
    if (typeof window === "undefined") return;
    const {pathname, hash, search} = window.location;
    const match = pathname.match(/\/talos\/(v\d+\.\d+)\//);
    if (!match) return;
    const detectedVersion = match[1];
    if (detectedVersion === latestVersion) return;
    setCurrentVersion(detectedVersion);
    if (isGreaterVersion(detectedVersion, latestVersion)) {
      setIsBeta(true);
    }
    const newPath = pathname.replace(`/talos/${detectedVersion}/`, `/talos/${latestVersion}/`);
    setLatestUrl(`${newPath}${search}${hash}`);
  }, []);
  if (!latestUrl || !currentVersion) return null;
  return <div className="not-prose sticky top-6 z-50 my-6">
      <div className="border border-yellow-500/30 bg-yellow-500/10 px-4 py-3 rounded-xl">
        <div className="text-sm">
          {isBeta ? <>
              ⚠️ You are viewing a <strong>beta version</strong> of Talos ({currentVersion}).
              This version may be unstable.
              <a href={latestUrl} className="ml-2 underline text-yellow-400 hover:text-yellow-300 font-medium">
                View latest stable version {latestVersion} →
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            </> : <>
              ⚠️ You are viewing an older version of Talos ({currentVersion}).
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                View the latest version {latestVersion} →
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        </div>
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    </div>;
};

<VersionWarningBanner />

```yaml theme={null}
apiVersion: v1alpha1
kind: ZswapConfig
maxPoolPercent: 25 # The maximum percent of memory that zswap can use.
shrinkerEnabled: true # Enable the shrinker feature: kernel might move
```

<table>
  <thead>
    <tr>
      <th>Field</th>
      <th>Type</th>
      <th>Description</th>
      <th>Value(s)</th>
    </tr>
  </thead>

  <tbody>
    <tr>
      <td>`maxPoolPercent`</td>
      <td>int</td>
      <td>The maximum percent of memory that zswap can use.<br />This is a percentage of the total system memory.<br />The value must be between 0 and 100.</td>

      <td />
    </tr>

    <tr>
      <td>`shrinkerEnabled`</td>
      <td>bool</td>
      <td>Enable the shrinker feature: kernel might move<br />cold pages from zswap to swap device to free up memory<br />for other use cases.</td>

      <td />
    </tr>
  </tbody>
</table>