CA_RECLAIM() parm on IGDSMSxx check this out: https://www.google.com.br/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CB8QFjAA&url=https%3A%2F%2Fshare.confex.com%2Fshare%2F115%2Fwebprogram%2FHandout%2FSession8054%2FSHARE_8054%2520VSAM%2520CA%2520Reclaim%2520Boston.pdf&ei=uhyKVPKsEafGsQSu8IBI&usg=AFQjCNGAs7K4w6JVW3P-EXRq85sDWTmfRg&sig2=yj75EznD1MmEkm90U9oC2g&bvm=bv.81828268,d.cWc
------------------------------------------------------------------------------------------------------------------------------- *Lucas Rosalen* [email protected] / *[email protected] <[email protected]>* +55 19 9-8146-7633 2014-12-11 19:59 GMT-02:00 R.S. <[email protected]>: > W dniu 2014-12-11 o 21:53, John Eells pisze: > >> [email protected] (Mark Jacobs) wrote: >> >>> There "might" be some slight performance impact, and also check for any >>> missing maintenance. That being said, we've had it turned on since zOS >>> 1.12 and it's never caused a problem. >>> >>> <snip> >> >> I am not a VSAM expert, and I didn't stay in a hotel of any description >> last night, but... >> >> - For the overwhelming majority of things I'm told we expect CA reclaim >> to improve performance (and keep a lid on space utilization too), sometimes >> significantly. >> >> - There is a rather pathological case for which you should not enable CA >> reclaim, which as far as I know we have only ever seen for real within IBM. >> If you insert enough records into a specific keyrange to split a CA (maybe >> more than once), and then delete them all, and then add records back into >> that same keyrange, rinse, and then repeat a few times, the overhead of >> repetitive CA reclaim/split processing won't exactly help performance. If >> it develops that you actually do have a data set that's processed that way, >> turn it off for that data set. >> >> Side question: How can I switch On/Off CA reclaim? > Is it some DC parameter or IDCAMS DEF CL one? > > > -- > Radoslaw Skorupka > Lodz, Poland > > > > > > > -- > Treść tej wiadomości może zawierać informacje prawnie chronione Banku > przeznaczone wyłącznie do użytku służbowego adresata. Odbiorcą może być > jedynie jej adresat z wyłączeniem dostępu osób trzecich. Jeżeli nie jesteś > adresatem niniejszej wiadomości lub pracownikiem upoważnionym do jej > przekazania adresatowi, informujemy, że jej rozpowszechnianie, kopiowanie, > rozprowadzanie lub inne działanie o podobnym charakterze jest prawnie > zabronione i może być karalne. Jeżeli otrzymałeś tę wiadomość omyłkowo, > prosimy niezwłocznie zawiadomić nadawcę wysyłając odpowiedź oraz trwale > usunąć tę wiadomość włączając w to wszelkie jej kopie wydrukowane lub > zapisane na dysku. > > This e-mail may contain legally privileged information of the Bank and is > intended solely for business use of the addressee. This e-mail may only be > received by the addressee and may not be disclosed to any third parties. If > you are not the intended addressee of this e-mail or the employee > authorized to forward it to the addressee, be advised that any > dissemination, copying, distribution or any other similar activity is > legally prohibited and may be punishable. If you received this e-mail by > mistake please advise the sender immediately by using the reply facility in > your e-mail software and delete permanently this e-mail including any > copies of it either printed or saved to hard drive. > > mBank S.A. z siedzibą w Warszawie, ul. Senatorska 18, 00-950 Warszawa, > www.mBank.pl, e-mail: [email protected] Sąd Rejonowy dla m. st. Warszawy > XII Wydział Gospodarczy Krajowego Rejestru Sądowego, nr rejestru > przedsiębiorców KRS 0000025237, NIP: 526-021-50-88. Według stanu na dzień > 01.01.2014 r. kapitał zakładowy mBanku S.A. (w całości wpłacony) wynosi > 168.696.052 złote. > > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
