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SVC 026

SVC 026は、CATALOG/INDEX/LOCATEマクロによって発行されるタイプ4のSVCです。このマクロは、ロックを獲得せずにロードモジュールIGC0002Fを呼び出します。

データセットがオープンまたはクローズする際に、カタログを更新します。OS/VS CAMLSTまたはVSAMカタログ管理パラメーターリストのアドレスをR1に配置します。

ヒント

VSAMファイルとQSAMファイルの過剰なオープンとクローズを避けることで、SVC 026で消費されるCPU時間と待ち時間を減少させ、発生しないようにすることもできます。属性レポートを参照して、SVCを呼び出すコードの領域を特定します。

参考資料

『IBM z/OS MVS Diagnosis Reference』