There are several reasons for disconnect time - read cache miss - reconnect misses - PPRC (I don't know how they call it on HDS) - CU busy
Are you on ESCON or FICON ? On 10/6/05, Bruce Black <[EMAIL PROTECTED]> wrote: > > > > > > >We have a high disconnect time on a IMS vsam database. device is HDS > >9980V. I guess this is because the channel program is performing SEEK > >for a specific block, or Search with Key. Can't see any other reason why > >this happens. > > > Unless I have my head on backwards today (it happens), search with key > or similar operations which cannot be converted to ECKD, cause large > CONNECT time, not disconnect, since they are essentially a CCW loop > (SEARCH, TIC) which remains connected to the channel. Did you mean > "disconnect" or "connect"? > > On a cached control unit (which is all of them today), disconnect time > is mostly time spent fetching a track into cache. > > -- > Bruce A. Black > Senior Software Developer for FDR > Innovation Data Processing 973-890-7300 > personal: [EMAIL PROTECTED] > sales info: [EMAIL PROTECTED] > tech support: [EMAIL PROTECTED] > web: www.innovationdp.fdr.com <http://www.innovationdp.fdr.com> > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO > Search the archives at http://bama.ua.edu/archives/ibm-main.html > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
