小编pex*_*xxy的帖子

我有一个存储过程，它每 2.5 秒被一个程序 24-7 调用一次。此过程通常在 10 毫秒内运行。一天几次（3 -5 次）运行大约需要 42953 毫秒（总是在 42950 和 42959 毫秒之间）。

我如何找到或描述为什么需要这么长时间的原因？

更新： Sql 服务器版本 2008 R2

程序：

select 
    [view_EventsToRaise].EventId,
    [view_EventsToRaise].EventStatus,
    [view_EventsToRaise].Tag,
    [view_EventsToRaise].SessieGebruikerId,
    Postbus.Persoon_Id_afz      as PersoonIdAfz,
    Postbus.Persoon_Id_adr      as PersoonIdAdr,
    Postbus.Persoon_Id_derde    as PersoonIdDerde,
    Postbus.Locatie_Id          as LocatieId,
    Postbus.Artikel_Id          as ArtikelId,
    Postbus.Onderwerp_Id        as OnderwerpId,
    Postbus.Bedrijf_Id_afz      as BedrijfIdAfz,
    Postbus.Bedrijf_Id_adr      as BedrijfIdAdr,
    Postbus.Bedrijf_Id_derde    as BedrijfIdDerde,
    Postbus.Document_Id         as DocumentId,      
    Postbus.Document            as Document,        
    DataKenmerk.Code            as PostbusDataCode,
    PostbusData.Inhoud          as PostbusDataInhoud,
    SimObj.Id                   as SimObjId,
    Eventsoort.Code             as Eventsoort
from 
    [view_EventsToRaise]
    left outer join Postbus
        left outer …