Manual:$wgUseETag/ja

詳細
MediaWiki が ETag ヘッダーを送信するかどうかです. Squid 2.6 では挙動がおかしいようです ( 参照). Note that nginx (before 1.7.3) removes the ETag header when it does itself the HTTP gzip compression (see for example this thread) but doesn’t remove it when MediaWiki send itself a gzip version (see Manual:$wgUseGzip). This issue is solved from nginx 1.7.3 (bug #377: etag не отдается с gzip).