Matview refresh taking too much time.....

Hello All,
I am trying to create Matview using db link, source table contain 30 crores of data.
And I am picking only 2.5 crores of data from source,and i have used where condition "WHERE ALLOCATION_DATE BETWEEN ADD_MONTHS(TRUNC(SYSDATE,'MM'),-1) AND ADD_MONTHS(LAST_DAY(TRUNC(SYSDATE)),6)".
But it is taking too much time to refresh and i am using atomic_refresh=> false.
Source table contains following columns
ASSIGNMENT#
PROJECT#
ALLOCATION_DATE
EFFORTS
WEEKEND_LEAVE_FLAG
ANU_YEAR
LAST_UPDATE
ALLOCATION_EFFORTS
and source table is partitioned on ANU_YEAR.
Can any one Please tell me how to create fast refresh matview.

953975 wrote:
Hello All,
I am trying to create Matview using db link, source table contain 30 crores of data.
And I am picking only 2.5 crores of data from source,and i have used where condition "WHERE ALLOCATION_DATE BETWEEN ADD_MONTHS(TRUNC(SYSDATE,'MM'),-1) AND ADD_MONTHS(LAST_DAY(TRUNC(SYSDATE)),6)".
But it is taking too much time to refresh and i am using atomic_refresh=> false.
Source table contains following columns
ASSIGNMENT#
PROJECT#
ALLOCATION_DATE
EFFORTS
WEEKEND_LEAVE_FLAG
ANU_YEAR
LAST_UPDATE
ALLOCATION_EFFORTS
and source table is partitioned on ANU_YEAR.
Can any one Please tell me how to create fast refresh matview.Please read {message:id=9360003} and follow the advice there.
Also, please use international English. Crore is not part of International English - use thousands, millions etc.

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