Choosing Between Server‑Side and Client‑Side Pagination in Yii2 GridView

Decision and constraints

When building a data‑heavy list in a Yii2 application you must decide how pagination will work. The choice affects database load, page size, SEO, and user experience. Constraints to consider:

• Expected row count (e.g., <10 k vs. >50 k rows).
• Acceptable initial payload size for the browser.
• Whether stable ordering is required when data changes between page requests.
• SEO friendliness of URLs (search‑engine crawability).

Supported options

Option	How it works	Typical use case
Server‑side pagination (GridView + yii\data\Pagination)	Yii issues a COUNT(*) query to determine total rows, then a SELECT … LIMIT … OFFSET … query for the current page. The HTML contains only the rows for that page.	Moderate to large datasets where keeping the response small and preserving SEO‑friendly URLs matters.
Client‑side pagination (LinkPager with ArrayDataProvider)	The controller loads all rows once (no LIMIT/OFFSET). Yii renders the full set; LinkPager hides/shows rows via JavaScript. No extra DB queries after the initial load.	Small datasets (<10 k rows) where UI responsiveness is prioritized and the extra payload is acceptable.

Trade‑offs

Server‑side

• Pros: Smaller HTTP payload, lower browser memory usage, pagination URLs are crawlable, DB load is spread across requests.
• Cons: Requires a reliable ORDER BY to avoid duplicate or missing rows when data changes; adds a COUNT query on each page request.

Client‑side

• Pros: Only one DB query, immediate page navigation without extra round‑trips, simpler controller code.
• Cons: Initial HTML can exceed 1 MB for large result sets, causing slow first paint and high memory consumption; pagination links are not SEO‑friendly unless you add pushState logic.

Concrete implementation

Server‑side example (GridView)

use yii\grid\GridView;
use yii\data\ActiveDataProvider;

// In controller action
$query = Post::find()->where(['status' => Post::STATUS_PUBLISHED])
                     ->orderBy('created_at DESC');
$dataProvider = new ActiveDataProvider([
    'query' => $query,
    'pagination' => [
        'defaultPageSize' => 20,   // adjust as needed
        'pageSizeLimit' => [5, 100],
    ],
]);

return $this->render('index', [
    'dataProvider' => $dataProvider,
]);

// In view file (index.php)
 $dataProvider,
    'columns' => [
        'id',
        'title',
        'created_at:datetime',
    ],
    // optional: use Pjax to avoid full page reloads
    'pjax' => true,
]);
?>

Client‑side example (LinkPager)

use yii\data\ArrayDataProvider;
use yii\widgets\LinkPager;

// In controller action
$posts = Post::find()->where(['status' => Post::STATUS_PUBLISHED])
                     ->orderBy('created_at DESC')
                     ->all();
$dataProvider = new ArrayDataProvider([
    'allModels' => $posts,
    'pagination' => [
        'defaultPageSize' => 25,
    ],
]);

return $this->render('index', [
    'dataProvider' => $dataProvider,
]);

// In view file (index.php)
 $dataProvider->getPagination(),
]);

foreach ($dataProvider->getModels() as $model) :
    // render each row (could be a table row or card)
    echo '' . $model->title . '';
endforeach;
?>

Validation and verification

To confirm that the chosen strategy meets your constraints, perform the following checks:

1. Payload size: Open Chrome DevTools → Network, reload the page, and look at the transferred HTML size. For server‑side pagination it should be roughly pageSize × averageRowSize; for client‑side it should be close to the full result set size.
2. DB query count: Enable Yii’s debug panel or run SHOW PROCESSLIST while navigating pages. Server‑side will show a COUNT query plus a limited SELECT each request; client‑side will show only the initial SELECT.
3. Order stability test: Insert a new row that would appear on the first page while you are viewing page 2, then navigate back to page 1. With proper ORDER BY (e.g., by a unique column plus a timestamp) server‑side pagination should not skip or duplicate rows.
4. Browser memory: Use the Performance tab → Memory to observe JS heap size while scrolling through many pages. Client‑side pagination will show a steady increase proportional to total rows.
5. SEO check: View the page source; server‑side pagination URLs contain ?page=2 etc., which crawlers can follow. Client‑side pagination typically lacks such URLs unless you implement pushState.

Limitations

• Server‑side pagination adds DB load; if your table lacks proper indexes on the ordered columns, the LIMIT/OFFSET can become slow.
• Client‑side pagination is unsuitable when the dataset may grow beyond a few‑tens of thousands of rows, as the initial download can exceed typical mobile bandwidth limits.
• Both strategies assume a static sort order; if you allow users to change sort columns frequently, you must invalidate pagination caches or recompute offsets.