Oracleでログファイル（*.trc, *.trm)が大量に出力される原因は？

Oracle12cのサーバで、1週間ほど前からログファイルが大量に出力されるようになりました。
多い時は1日で7GB以上出力されます。（6月頭のログを見ると10MBほどでした。）
ログファイルの中身を読んでもなにが原因なのかイマイチ読み取れません…。
原因として考えらえることは何でしょうか？

補足

大量に出力されるファイルは以下のような名前です。
<SID>__j000_nnnnn.trc

<SID>__j000_nnnnn.trm

*.trcファイルの中身を見ると、以下のような内容が複数出力されています。（一部抜粋＋マスク済み）

Trace file D:******_j000_9028.trc
Oracle Database 12c Standard Edition Release 12.2.0.1.0 - 64bit Production
Build label:    RDBMS_12.2.0.1.0_WINDOWS.X64_170210.4
Windows NT Version V6.2  
ORACLE_HOME =  D:***\12.2.0\dbhome_1
Node name           : ****
CPU                 : 12 - type 8664, 6 Physical Cores
Process Affinity    : 0x0x0000000000000000
Memory (Avail/Total): Ph:5974M/15976M, Ph+PgF:7266
Instance name: ****
Redo thread mounted by this instance: 1
Oracle process number: 23
Windows thread id: 9028, image: ORACLE.EXE (J000)


*** 2020-06-24T15:42:16.340287+09:00
*** SESSION ID:(1346.54769) 2020-06-24T15:42:16.340287+09:00
*** CLIENT ID:() 2020-06-24T15:42:16.341447+09:00
*** SERVICE NAME:(SYS$USERS) 2020-06-24T15:42:16.341447+09:00
*** MODULE NAME:() 2020-06-24T15:42:16.341447+09:00
*** ACTION NAME:() 2020-06-24T15:42:16.341447+09:00
*** CLIENT DRIVER:() 2020-06-24T15:42:16.341447+09:00
 
KGI Error-3 = 5

LibraryHandle:  Address=00007FFCA0A259A8 Hash=1b47f5ce LockMode=N PinMode=S LoadLockMode=0 Status=VALD 
  ObjectName:  Name=SYSMAN.EMD_LOADER   
    FullHashValue=5a76b5fb0c5ab818215053c91b47f5ce Namespace=TABLE/PROCEDURE(01) Type=PACKAGE(09) ContainerId=0 ContainerUid=0 Identifier=77455 OwnerIdn=112 
  Statistics:  InvalidationCount=0 ExecutionCount=0 LoadCount=1 ActiveLocks=1 TotalLockCount=532 TotalPinCount=5311 
  Counters:  BrokenCount=1 RevocablePointer=1 KeepDependency=0 Version=0 BucketInUse=2 HandleInUse=2 HandleReferenceCount=0 
  Concurrency:  DependencyMutex=00007FFCA0A25A58(0, 5313, 0, 0) Mutex=00007FFCA0A25AF8(1346, 22398, 0, 6) 
  Flags=PIN/TIM/[00002801] Flags2=[0000] 
  WaitersLists:  
    Lock=00007FFCA0A25A38[00007FFCA0A25A38,00007FFCA0A25A38] 
    Pin=00007FFCA0A25A18[00007FFCA0A25A18,00007FFCA0A25A18] 
    LoadLock=00007FFCA0A25A90[00007FFCA0A25A90,00007FFCA0A25A90] 
  Timestamp:  Current=01-21-2020 19:35:40 
  HandleReference:  Address=00007FFCA0A25B78 Handle=00007FFCA22E98A0 Flags=OWN[200] 
  ReferenceList:  
    Reference:  Address=00007FFCA07DCFF8 Handle=00007FFCA07DDF48 Flags=DEP[01] 
      Timestamp=01-21-2020 19:35:40 InvalidatedFrom=0 
    Reference:  Address=00007FFCA05A0228 Handle=00007FFCA05A10B8 Flags=DEP[01] 
      Timestamp=01-21-2020 19:35:40 InvalidatedFrom=0 
    Reference:  Address=00007FFCA07FF378 Handle=00007FFCA08004E0 Flags=DEP[01] 
      Timestamp=01-21-2020 19:35:40 InvalidatedFrom=0 
    Reference:  Address=00007FFCA0A26830 Handle=00007FFCA0A27990 Flags=DEP[01] 
      Timestamp=01-21-2020 19:35:40 InvalidatedFrom=0 
  LibraryObject:  Address=00007FFCA07E1BF0 HeapMask=0000-0011-0015-0000 Flags=EXS/LOC[0004] Flags2=[4000000] PublicFlags=/IVR[0200] 
    Dependencies:  count='11' size='16' table='00007FFCA07E2A98' 
      Dependency:  num='0' 
        Reference=00007FFCA07E1E58 Position=0 Flags=DEP[0001] 
        Handle=00007FFCA2420228 Type=PACKAGE(09) Parent=SYS.STANDARD   
      Dependency:  num='1' 
        Reference=00007FFCA07E1E98 Position=0 Flags=DEP[0001] 
        Handle=00007FFCA07FDEC8 Type=TYPE(13) Parent=SYSMAN.SMP_EMD_NVPAIR_ARRAY   
      Dependency:  num='2' 
        Reference=00007FFCA07E1ED8 Position=0 Flags=DEP[0001] 
        Handle=00007FFCA07E1818 Type=TYPE(13) Parent=SYSMAN.EM_LOADER_UPLOAD_TIME_ARRAY   
      Dependency:  num='3' 
        Reference=00007FFCA07E1F18 Position=0 Flags=DEP[0001] 
        Handle=00007FFCA07E14E8 Type=TYPE(13) Parent=SYSMAN.MGMT_TARGET_PROPERTY_LIST   
      Dependency:  num='4' 
        Reference=00007FFCA07E1F58 Position=0 Flags=DEP[0001] 
        Handle=00007FFCA07E11B8 Type=TYPE(13) Parent=SYSMAN.MGMT_TARGET_CRED_ARRAY   
      Dependency:  num='5' 
        Reference=00007FFCA07E1F98 Position=0 Flags=DEP[0001] 
        Handle=00007FFCA07E0E88 Type=TYPE(13) Parent=SYSMAN.MGMT_PURGE_CALLBACK_PARAMS   
      Dependency:  num='6' 
        Reference=00007FFCA07E1FD8 Position=0 Flags=DEP[0001] 
        Handle=00007FFCA0A097A8 Type=TABLE(02) Parent=SYSMAN.MGMT_TARGETS   
      Dependency:  num='7' 
        Reference=00007FFCA07E2040 Position=0 Flags=DEP[0001] 
        Handle=00007FFCA0A0CF80 Type=TYPE(13) Parent=SYSMAN.SMP_EMD_STRING_ARRAY   
      Dependency:  num='8' 
        Reference=00007FFCA07E2080 Position=0 Flags=DEP[0001] 
        Handle=00007FFCA09A1DB8 Type=TYPE(13) Parent=SYSMAN.SMP_EMD_INTEGER_ARRAY   
      Dependency:  num='9' 
        Reference=00007FFCA07E20C0 Position=0 Flags=DEP[0001] 
        Handle=00007FFCA07E0B58 Type=TYPE(13) Parent=SYSMAN.MGMT_JOB_VECTOR_PARAMS   
      Dependency:  num='10' 
        Reference=00007FFCA07E2100 Position=0 Flags=DEP[0001] 
        Handle=00007FFCA07FE528 Type=TYPE(13) Parent=SYSMAN.MGMT_BROKEN_TARGET_LIST   
    Accesses:  count='10' size='16' 
      Dependency:  num='1' Type=000c 
      Dependency:  num='2' Type=000c 
      Dependency:  num='3' Type=000c 
      Dependency:  num='4' Type=000c 
      Dependency:  num='5' Type=000c 
      Dependency:  num='6' Type=0011 
      Dependency:  num='7' Type=000c 
      Dependency:  num='8' Type=000c 
      Dependency:  num='9' Type=000c 
      Dependency:  num='10' Type=000c 
    DataBlocks:  
      Block:  #='0' name=KGLH0^1b47f5ce pins=0 Change=NONE   
        Heap=00007FFCA07E2B80 Pointer=00007FFCA07E1D10 Extent=00007FFCA07E1B48 Flags=I/-/P/A/-/-/- 
        FreedLocation=0 Alloc=2.273438 Size=3.976563 LoadTime=370906 
      Block:  #='2' name=PLDIA^1b47f5ce pins=0 Change=NONE   
        Heap=00007FFCA07E2328 Pointer=0000000000000000 Extent=0000000000000000 Flags=I/-/-/-/-/-/- 
        FreedLocation=3 Alloc=0.000000 Size=0.000000 LoadTime=0 
      Block:  #='4' name=PLMCD^1b47f5ce pins=1 Change=NONE   
        Heap=00007FFCA07E2250 Pointer=00007FFC9FE122D8 Extent=00007FFC9FE12230 Flags=I/-/P/A/-/-/- 
        FreedLocation=0 Alloc=17.312500 Size=20.109375 LoadTime=370906 KGI Error-3 = 5