Database Tuning (MOSC)

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"enq: HW - contention"

edited Jun 29, 2015 5:21AM in Database Tuning (MOSC) 4 commentsAnswered

Dear Team,

we are always (every secs) getting "enq: HW - contention" wait events, due to updation happening in the BLOB column to our production Table.

FYI. Pasted the structure of the table along with lob storage allocation as well for your reference.

  CREATE TABLE "PSBPMDBA"."LSW_BPD_INSTANCE_DATA"

   (    "BPD_INSTANCE_ID" NUMBER(12,0) NOT NULL ENABLE,

        "DATA" BLOB,

         CONSTRAINT "LSWC_BPD_INS_D_FK0" FOREIGN KEY ("BPD_INSTANCE_ID")

          REFERENCES "PSBPMDBA"."LSW_BPD_INSTANCE" ("BPD_INSTANCE_ID") ENABLE

   ) SEGMENT CREATION IMMEDIATE

  PCTFREE 10 PCTUSED 40 INITRANS 32 MAXTRANS 255

NOCOMPRESS LOGGING

  STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645

  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1

  BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT)

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