Parallel queries are suspending

Question

A procedure start two concurrent jobs. Each of them runs identical queries but the name of partition of destination table and bind variables defining partitions of source tables.
On schema A(test) the procedure works fine for a few minutes, on schema B(business) queries are suspended.
Any suggestions greatly appreciated.
Query generated by job:
BEGIN
MERGE /*+ APPEND USE_HASH(s d)*/ INTO D_SERVICE_FACT_BUF ::PART_DEF d
USING
SELECT /*+ USE_NL( TSRF DSUB ) USE_NL( TSRF NTRR ) USE_NL( TSRF NBLP ) USE_NL( TSRF NTKG1 ) USE_NL( TSRF NTKG2 ) */
COL1,
COL2,
FROM
<SCHEMA_NAME>.T_SERVICE_FACT TSRF,
<SCHEMA_NAME>.D_SUBSCRIPTION_ACT DSUB,
<SCHEMA_NAME>.N_TARIFF_RULE_ON_CALLS NTRR,
<SCHEMA_NAME>.N_BILLING_PROCEDURE NBLP,
<SCHEMA_NAME>.N_TRUNKGROUP NTKG1,
<SCHEMA_NAME>.N_TRUNKGROUP NTKG2,
<SCHEMA_NAME>.N_NUMZONE NNMZ
WHERE
1 = 1 AND
TSRF.SRC = DSUB.SRC AND
TSRF.SRC = NTRR.SRC(+) AND
TSRF.SRC = NBLP.SRC(+) AND
TSRF.SRC = NNMZ.SRC(+) AND
TSRF.SRF_RF_SUBSCRIPTION = DSUB.SUB_ID AND
TSRF.SRF_RF_TARIFF_RULE = NTRR.TRR_ID(+) AND
TSRF.SRF_DT_START BETWEEN DSUB.FD AND DSUB.TD AND
TSRF.SRF_DT_START BETWEEN NTRR.FD(+) AND NTRR.TD(+) AND
TSRF.SRF_DT_START BETWEEN NTKG1.FD(+) AND NTKG1.TD(+) AND
TSRF.SRF_DT_START BETWEEN NTKG2.FD(+) AND NTKG2.TD(+) AND
TSRF.SRF_DT_START BETWEEN NNMZ.FD(+) AND NNMZ.TD(+) AND
TSRF.SRF_RF_BILLING_PROC = NBLP.BLP_ID(+) AND
TSRF.SRF_RF_TRUNKGROUP_IN = NTKG1.TKG_ID(+) AND
TSRF.SRF_RF_TRUNKGROUP_OUT = NTKG2.TKG_ID(+) AND
TSRF.SRF_RF_NUMZONE = NNMZ.NMZ_ID(+) AND
:LDN = :LDN AND
:LDN_UP = :LDN_UP AND
TSRF.HASH_KEY = :SRF_HK AND
1 = 1 ) s
ON ( 1 = 0 )
WHEN MATCHED THEN UPDATE SET
d.src = 0
WHEN NOT MATCHED THEN INSERT
<DST_COLS_LIST>
VALUES
<RES_COL_LIST>
END;

Answer 1

Hi,
Suspending means are you getting error after some time if yes (then what is the error ), or it just hang and does not give you output, then please post the wait event through V$session_wait or session trace.
Regards
Anurag Tibrewal