[20210722]sqlplus下show recycebin的小問題.txt

[20210722]sqlplus下show recycebin的小問題.txt

--//sqlplus下執行show recycebin遇到一些疑問,經過測試慢慢展開問題的探究.

1.環境:
SCOTT@test01p> @ ver1
PORT_STRING                    VERSION        BANNER                                                                               CON_ID
------------------------------ -------------- -------------------------------------------------------------------------------- ----------
IBMPC/WIN_NT64-9.1.0           12.2.0.1.0     Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production              0

SCOTT@test01p> create table tx as select * from dept ;
Table created.

SCOTT@test01p> create table ty as select * from dept ;
Table created.

2.測試:
SCOTT@test01p> show recyclebin

SCOTT@test01p> drop table tx ;
Table dropped.

SCOTT@test01p> drop table ty ;
Table dropped.

SCOTT@test01p> show recyclebin
ORIGINAL NAME    RECYCLEBIN NAME                OBJECT TYPE  DROP TIME
---------------- ------------------------------ ------------ -------------------
TX               BIN$T7f14az+TMuluJgGIOXiPA==$0 TABLE        2021-07-21:20:33:43
TY               BIN$5quvB25qT7eMZtdPExTTZg==$0 TABLE        2021-07-21:20:33:45

--//OK正確.在結尾加入分號看看.
SCOTT@test01p> show recyclebin;
ORIGINAL NAME    RECYCLEBIN NAME                OBJECT TYPE  DROP TIME
---------------- ------------------------------ ------------ -------------------
TX               BIN$T7f14az+TMuluJgGIOXiPA==$0 TABLE        2021-07-21:20:33:43
TY               BIN$5quvB25qT7eMZtdPExTTZg==$0 TABLE        2021-07-21:20:33:45
--//OK正確.在結尾加入空格(tab鍵)與分號看看.

SCOTT@test01p> show recyclebin  ;
--//顯示爲空,爲何?

3.使用toad自帶的SQL Tracker跟蹤:
SELECT ORIGINAL_NAME ORIGNAME_PLUS_SHOW_RECYC,
       OBJECT_NAME OBJECTNAME_PLUS_SHOW_RECYC,TYPE OBJTYPE_PLUS_SHOW_RECYC,
       DROPTIME DROPTIME_PLUS_SHOW_RECYC
  FROM USER_RECYCLEBIN
 WHERE CAN_UNDROP    = 'YES'
   AND ORIGINAL_NAME = UPPER(:NMBIND_SHOW_OBJ)
   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 ORDER BY ORIGINAL_NAME,DROPTIME DESC,OBJECT_NAME;

--//爲了美觀,我作了格式化處理.你能夠發現下劃線帶入參數:NMBIND_SHOW_OBJ.很明顯我在分號前一個空格的狀況下,
--//帶入的參數爲空,這樣就沒有顯示.

SCOTT@test01p> show recyclebin  tx
ORIGINAL NAME    RECYCLEBIN NAME                OBJECT TYPE  DROP TIME
---------------- ------------------------------ ------------ -------------------
TX               BIN$T7f14az+TMuluJgGIOXiPA==$0 TABLE        2021-07-21:20:33:43

SCOTT@test01p> show recyclebin    tx ;
ORIGINAL NAME    RECYCLEBIN NAME                OBJECT TYPE  DROP TIME
---------------- ------------------------------ ------------ -------------------
TX               BIN$T7f14az+TMuluJgGIOXiPA==$0 TABLE        2021-07-21:20:33:43

--//你能夠發現帶入參數的狀況下顯示正確.若是你執行show recyclebin;執行的sqlplus以下:

SELECT ORIGINAL_NAME ORIGNAME_PLUS_SHOW_RECYC,
       OBJECT_NAME OBJECTNAME_PLUS_SHOW_RECYC,TYPE OBJTYPE_PLUS_SHOW_RECYC,
       DROPTIME DROPTIME_PLUS_SHOW_RECYC
  FROM USER_RECYCLEBIN
 WHERE CAN_UNDROP = 'YES'
 ORDER BY ORIGINAL_NAME,DROPTIME DESC,OBJECT_NAME

--//沒有綁定變量,說明個人判斷正確.

4.繼續,以上測試在windows下進行,若是linux呢?

SCOTT@book> @ ver1
PORT_STRING                    VERSION        BANNER
------------------------------ -------------- --------------------------------------------------------------------------------
x86_64/Linux 2.4.xx            11.2.0.4.0     Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

SCOTT@book> show recyclebin;
ORIGINAL NAME    RECYCLEBIN NAME                OBJECT TYPE  DROP TIME
---------------- ------------------------------ ------------ -------------------
TY               BIN$x5jlVlgTFx3gU05kqMAqNg==$0 TABLE        2021-07-21:09:20:02

SCOTT@book> show recyclebin ;
ORA-24550: signal received: [si_signo=11] [si_errno=0] [si_code=1] [si_int=33260000] [si_ptr=0x1fb81e0] [si_addr=(nil)]
kpedbg_dmp_stack()+362
<-kpeDbgCrash()+192
<-kpeDbgSignalHandler()+119
<-skgesig_sigactionHandler()+218
<-__sighandler()
<-afiwsk()+544
<-afinsym()+80
<-afishosop()+1930
<-afisho()+516
<-aficmd()+2714
<-aficfd()+2669
<-aficdr()+138
<-afidrv()+4237
<-frame_dummy()+123
<-__libc_start_main()+244
--//注:我作了折行處理，否則太長了。
rlwrap: warning: sqlplus crashed, killed by SIGSEGV.
rlwrap itself has not crashed, but for transparency,
it will now kill itself (without dumping core) with the same signal

warnings can be silenced by the --no-warnings (-n) option
Segmentation fault
--//在分號前有空格的狀況下,鏈接進程直接crash.
--//使用http://orafun.info/stack/查詢，拷貝和粘貼以下：
kpedbg_dmp_stack()+362
<-kpeDbgCrash()+192
<-kpeDbgSignalHandler()+119
<-skgesig_sigactionHandler()+218
<-__sighandler()
<-afiwsk()+544
<-afinsym()+80
<-afishosop()+1930
<-afisho()+516
<-aficmd()+2714
<-aficfd()+2669
<-aficdr()+138
<-afidrv()+4237
<-frame_dummy()+123
<-__libc_start_main()+244

Parsed stack:
Discovered stack type: short stack

Parsed short stack:
kpedbg_dmp_stack()+362             kernel programmatic interface  [partial hit for: kp ]
kpeDbgCrash()+192                  kernel programmatic interface  [partial hit for: kp ]
kpeDbgSignalHandler()+119          kernel programmatic interface  [partial hit for: kp ]
skgesig_sigactionHandler()+218     operating system dependent kernel generic  [partial hit for: skg ]
__sighandler()                      (?)  [partial hit for:  ]
afiwsk()+544                        (?)  [partial hit for:  ]
afinsym()+80                        (?)  [partial hit for:  ]
afishosop()+1930                    (?)  [partial hit for:  ]
afisho()+516                        (?)  [partial hit for:  ]
aficmd()+2714                       (?)  [partial hit for:  ]
aficfd()+2669                       (?)  [partial hit for:  ]
aficdr()+138                        (?)  [partial hit for:  ]
afidrv()+4237                       (?)  [partial hit for:  ]
frame_dummy()+123                   (?)  [partial hit for:  ]
__libc_start_main()+244             (?)  [partial hit for:  ]

$ oerr ora 24550
24550, 00000, "unhandled signal #%ld received. %s"
// *Cause:   Serious error: signal received
// *Action:  Refer to the platform-specific signal code, and see if the
//           application code caused the error. Otherwise, record
//           all error state and notify Oracle Support Services.

5.繼續登陸測試:
SCOTT@book> @ spid

       SID    SERIAL# PROCESS                  SERVER    SPID       PID  P_SERIAL# C50
---------- ---------- ------------------------ --------- ------ ------- ---------- --------------------------------------------------
       295          9 17218                    DEDICATED 17219       21          5 alter system kill session '295,9' immediate;

$ strace -f -p 17219
Process 17219 attached - interrupt to quit
read(7, "", 8208)                       = 0
close(10)                               = 0
close(7)                                = 0
getrusage(RUSAGE_SELF, {ru_utime={0, 22996}, ru_stime={0, 14997}, ...}) = 0
times({tms_utime=2, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 1825693747
times({tms_utime=2, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 1825693747
close(4)                                = 0
times({tms_utime=2, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 1825693747
open("/u01/app/oracle/product/11.2.0.4/dbhome_1/rdbms/mesg/diaus.msb", O_RDONLY) = 4
fcntl(4, F_SETFD, FD_CLOEXEC)           = 0
lseek(4, 0, SEEK_SET)                   = 0
read(4, "\25\23\"\1\23\3\t\t\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 256) = 256
lseek(4, 512, SEEK_SET)                 = 512
read(4, "\371\311\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 512) = 512
lseek(4, 1024, SEEK_SET)                = 1024
read(4, "\210\273\353\273\363\273\373\273\4\274\16\274\26\274!\274)\2741\274<\274G\274T\274_\274k\274t\274"..., 192) = 192
stat("/u01/app/oracle", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
getrlimit(RLIMIT_NOFILE, {rlim_cur=64*1024, rlim_max=64*1024}) = 0
getrlimit(RLIMIT_FSIZE, {rlim_cur=RLIM_INFINITY, rlim_max=RLIM_INFINITY}) = 0
stat("/u01/app/oracle/diag", {st_mode=S_IFDIR|0775, st_size=4096, ...}) = 0
stat("/u01/app/oracle/diag/rdbms", {st_mode=S_IFDIR|0775, st_size=4096, ...}) = 0
stat("/u01/app/oracle/diag/rdbms/book", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
stat("/u01/app/oracle/diag/rdbms/book/book", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
stat("/u01/app/oracle/diag/rdbms/book/book/trace", {st_mode=S_IFDIR|0750, st_size=5337088, ...}) = 0
stat("/u01/app/oracle/diag/rdbms/book/book/alert", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
stat("/u01/app/oracle/diag/rdbms/book/book/incident", {st_mode=S_IFDIR|0750, st_size=12288, ...}) = 0
stat("/u01/app/oracle/diag/rdbms/book/book/metadata", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
stat("/u01/app/oracle/diag/rdbms/book/book/metadata_pv", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
stat("/u01/app/oracle/diag/rdbms/book/book/metadata_dgif", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
stat("/u01/app/oracle/diag/rdbms/book/book/hm", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
stat("/u01/app/oracle/diag/rdbms/book/book/ir", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
stat("/u01/app/oracle/diag/rdbms/book/book/incpkg", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
stat("/u01/app/oracle/diag/rdbms/book/book/sweep", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
stat("/u01/app/oracle/diag/rdbms/book/book/lck", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
stat("/u01/app/oracle/diag/rdbms/book/book/cdump", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
stat("/u01/app/oracle/diag/rdbms/book/book/stage", {st_mode=S_IFDIR|0750, st_size=32768, ...}) = 0
stat("/u01/app/oracle/diag/rdbms/book/book/metadata", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
lstat("/u01/app/oracle/diag/rdbms/book/book/metadata/ADR_CONTROL.ams", {st_mode=S_IFREG|0640, st_size=65536, ...}) = 0
stat("/u01/app/oracle/diag/rdbms/book/book/metadata/ADR_CONTROL.ams", {st_mode=S_IFREG|0640, st_size=65536, ...}) = 0
lstat("/u01/app/oracle/diag/rdbms/book/book/metadata/ADR_INVALIDATION.ams", {st_mode=S_IFREG|0640, st_size=65536, ...}) = 0
stat("/u01/app/oracle/diag/rdbms/book/book/metadata/ADR_INVALIDATION.ams", {st_mode=S_IFREG|0640, st_size=65536, ...}) = 0
lstat("/u01/app/oracle/diag/rdbms/book/book/metadata/INC_METER_IMPT_DEF.ams", {st_mode=S_IFREG|0640, st_size=65536, ...}) = 0
stat("/u01/app/oracle/diag/rdbms/book/book/metadata/INC_METER_IMPT_DEF.ams", {st_mode=S_IFREG|0640, st_size=65536, ...}) = 0
lstat("/u01/app/oracle/diag/rdbms/book/book/metadata/INC_METER_PK_IMPTS.ams", {st_mode=S_IFREG|0640, st_size=65536, ...}) = 0
stat("/u01/app/oracle/diag/rdbms/book/book/metadata/INC_METER_PK_IMPTS.ams", {st_mode=S_IFREG|0640, st_size=65536, ...}) = 0
lstat("/u01/app/oracle/diag/rdbms/book/book/metadata/INCIDENT.ams", {st_mode=S_IFREG|0640, st_size=475136, ...}) = 0
stat("/u01/app/oracle/diag/rdbms/book/book/metadata/INCIDENT.ams", {st_mode=S_IFREG|0640, st_size=475136, ...}) = 0
shmdt(0x60000000)                       = 0
shmdt(0x60c00000)                       = 0
shmdt(0x86800000)                       = 0
munmap(0x7fcda79d2000, 143360)          = 0
munmap(0x7fcda79f5000, 143360)          = 0
munmap(0x7fcda7a18000, 143360)          = 0
close(4)                                = 0
munmap(0x7fcda7b7b000, 262144)          = 0
munmap(0x7fcda75ba000, 524288)          = 0
munmap(0x7fcda74ba000, 1048576)         = 0
munmap(0x7fcda763c000, 524288)          = 0
close(6)                                = 0
rt_sigprocmask(SIG_BLOCK, [ALRM], NULL, 8) = 0
rt_sigaction(SIGALRM, {SIG_DFL, ~[ILL ABRT BUS FPE SEGV USR2 XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, {0x7edfb0c, ~[ILL ABRT BUS FPE KILL SEGV USR2 STOP XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [ALRM], NULL, 8) = 0
rt_sigaction(SIGILL, {SIG_DFL, ~[ILL ABRT BUS FPE SEGV USR2 XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, {0x6b48fd6, ~[ILL ABRT BUS FPE KILL SEGV USR2 STOP XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_STACK|SA_SIGINFO, 0x379a00eca0}, 8) = 0
rt_sigaction(SIGTRAP, {SIG_DFL, ~[ILL ABRT BUS FPE SEGV USR2 XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, {0x6b48fd6, ~[ILL ABRT BUS FPE KILL SEGV USR2 STOP XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_STACK|SA_SIGINFO, 0x379a00eca0}, 8) = 0
rt_sigaction(SIGABRT, {SIG_DFL, ~[ILL ABRT BUS FPE SEGV USR2 XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, {0x6b48fd6, ~[ILL ABRT BUS FPE KILL SEGV USR2 STOP XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_STACK|SA_SIGINFO, 0x379a00eca0}, 8) = 0
rt_sigaction(SIGFPE, {SIG_DFL, ~[ILL ABRT BUS FPE SEGV USR2 XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, {0x6b48fd6, ~[ILL ABRT BUS FPE KILL SEGV USR2 STOP XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_STACK|SA_SIGINFO, 0x379a00eca0}, 8) = 0
rt_sigaction(SIGBUS, {SIG_DFL, ~[ILL ABRT BUS FPE SEGV USR2 XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, {0x6b48fd6, ~[ILL ABRT BUS FPE KILL SEGV USR2 STOP XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_STACK|SA_SIGINFO, 0x379a00eca0}, 8) = 0
rt_sigaction(SIGSEGV, {SIG_DFL, ~[ILL ABRT BUS FPE SEGV USR2 XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, {0x6b48fd6, ~[ILL ABRT BUS FPE KILL SEGV USR2 STOP XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_STACK|SA_SIGINFO, 0x379a00eca0}, 8) = 0
rt_sigaction(SIGSYS, {SIG_DFL, ~[ILL ABRT BUS FPE SEGV USR2 XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, {0x6b48fd6, ~[ILL ABRT BUS FPE KILL SEGV USR2 STOP XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_STACK|SA_SIGINFO, 0x379a00eca0}, 8) = 0
rt_sigaction(SIGXCPU, {SIG_DFL, ~[ILL ABRT BUS FPE SEGV USR2 XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, {0x6b48fd6, ~[ILL ABRT BUS FPE KILL SEGV USR2 STOP XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_STACK|SA_SIGINFO, 0x379a00eca0}, 8) = 0
rt_sigaction(SIGXFSZ, {SIG_DFL, ~[ILL ABRT BUS FPE SEGV USR2 XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, {0x6b48fd6, ~[ILL ABRT BUS FPE KILL SEGV USR2 STOP XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_STACK|SA_SIGINFO, 0x379a00eca0}, 8) = 0
rt_sigaction(SIGTERM, {SIG_DFL, ~[ILL ABRT BUS FPE SEGV USR2 XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, {0x1, ~[ILL ABRT BUS FPE KILL SEGV USR2 STOP XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, 8) = 0
rt_sigaction(SIGHUP, {SIG_DFL, ~[ILL ABRT BUS FPE SEGV USR2 XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, {0x1, ~[ILL ABRT BUS FPE KILL SEGV USR2 STOP XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, 8) = 0
rt_sigaction(SIGPIPE, {SIG_DFL, ~[ILL ABRT BUS FPE SEGV USR2 XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, {0x7edfb0c, ~[ILL ABRT BUS FPE KILL SEGV USR2 STOP XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, 8) = 0
rt_sigaction(SIGPIPE, {0x7edfb0c, ~[ILL ABRT BUS FPE SEGV USR2 XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, {SIG_DFL, ~[ILL ABRT BUS FPE KILL SEGV USR2 STOP XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, 8) = 0
rt_sigaction(SIGVTALRM, {SIG_DFL, ~[ILL ABRT BUS FPE SEGV USR2 XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, {0x1, ~[ILL ABRT BUS FPE KILL SEGV USR2 STOP XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, 8) = 0
rt_sigaction(SIGPROF, {SIG_DFL, ~[ILL ABRT BUS FPE SEGV USR2 XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, {0x1, ~[ILL ABRT BUS FPE KILL SEGV USR2 STOP XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, 8) = 0
rt_sigaction(SIGUSR1, {SIG_DFL, ~[ILL ABRT BUS FPE SEGV USR2 XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, {0x1, ~[ILL ABRT BUS FPE KILL SEGV USR2 STOP XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, 8) = 0
rt_sigaction(SIGUSR2, {SIG_DFL, ~[ILL ABRT BUS FPE SEGV USR2 XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, {0x6b48b00, ~[ILL ABRT BUS FPE KILL SEGV USR2 STOP XCPU XFSZ SYS RTMIN RT_1], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x379a00eca0}, 8) = 0
close(3)                                = 0
munmap(0x7fcda7cbb000, 2116176)         = 0
munmap(0x7fcda7a3b000, 1310720)         = 0
exit_group(0)                           = ?
Process 17219 detached

--//若是正常執行跟蹤看到的是這個:
$ strace -f -p 17236
Process 17236 attached - interrupt to quit
read(7, "\2\t\0\0\6\0\0\0\0\0\21i\32\376\377\377\377\377\377\377\377\1\0\0\0\0\0\0\0\2\0\0"..., 8208) = 521
getrusage(RUSAGE_SELF, {ru_utime={0, 21996}, ru_stime={0, 15997}, ...}) = 0
times({tms_utime=2, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 1825705565
getrusage(RUSAGE_SELF, {ru_utime={0, 21996}, ru_stime={0, 15997}, ...}) = 0
getrusage(RUSAGE_SELF, {ru_utime={0, 21996}, ru_stime={0, 15997}, ...}) = 0
times({tms_utime=2, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 1825705565
getrusage(RUSAGE_SELF, {ru_utime={0, 21996}, ru_stime={0, 15997}, ...}) = 0
times({tms_utime=2, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 1825705565
getrusage(RUSAGE_SELF, {ru_utime={0, 21996}, ru_stime={0, 15997}, ...}) = 0
times({tms_utime=2, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 1825705565
getrusage(RUSAGE_SELF, {ru_utime={0, 21996}, ru_stime={0, 15997}, ...}) = 0
getrusage(RUSAGE_SELF, {ru_utime={0, 21996}, ru_stime={0, 15997}, ...}) = 0
times({tms_utime=2, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 1825705565
getrusage(RUSAGE_SELF, {ru_utime={0, 21996}, ru_stime={0, 15997}, ...}) = 0
getrusage(RUSAGE_SELF, {ru_utime={0, 21996}, ru_stime={0, 15997}, ...}) = 0
getrusage(RUSAGE_SELF, {ru_utime={0, 21996}, ru_stime={0, 15997}, ...}) = 0
getrusage(RUSAGE_SELF, {ru_utime={0, 21996}, ru_stime={0, 15997}, ...}) = 0
times({tms_utime=2, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 1825705566
times({tms_utime=2, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 1825705566
getrusage(RUSAGE_SELF, {ru_utime={0, 21996}, ru_stime={0, 15997}, ...}) = 0
getrusage(RUSAGE_SELF, {ru_utime={0, 21996}, ru_stime={0, 16997}, ...}) = 0
getrusage(RUSAGE_SELF, {ru_utime={0, 21996}, ru_stime={0, 16997}, ...}) = 0
getrusage(RUSAGE_SELF, {ru_utime={0, 21996}, ru_stime={0, 16997}, ...}) = 0
times({tms_utime=2, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 1825705566
write(10, "\2\302\0\0\6\0\0\0\0\0\20\27\0\0\0oh\241\271\24\37\270gC\33\240\301\32#\30\246x"..., 706) = 706
read(7, "\0\25\0\0\6\0\0\0\0\0\3\5\34\3\0\0\0\310\0\0\0", 8208) = 21
getrusage(RUSAGE_SELF, {ru_utime={0, 21996}, ru_stime={0, 16997}, ...}) = 0
times({tms_utime=2, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 1825705566
getrusage(RUSAGE_SELF, {ru_utime={0, 21996}, ru_stime={0, 16997}, ...}) = 0
getrusage(RUSAGE_SELF, {ru_utime={0, 21996}, ru_stime={0, 16997}, ...}) = 0
getrusage(RUSAGE_SELF, {ru_utime={0, 21996}, ru_stime={0, 16997}, ...}) = 0
getrusage(RUSAGE_SELF, {ru_utime={0, 21996}, ru_stime={0, 16997}, ...}) = 0
times({tms_utime=2, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 1825705566
write(10, "\0\254\0\0\6\0\0\0\0\0\4\1\0\0\0\32\0\1\1\0\0\0{\5\0\0\0\0\3\0\0\0"..., 172) = 172
read(7,

--//sqlplus下使用show recycebin給維護者埋了一個不小的坑.浪費一個上午的時間定位這個問題.
--//在linux下太難定位了,直接crash,真心沒想到問題出在這個空格+分號上.
--//若是不在windows下測試,沒法定位這個問題,不知道爲何windows下的oracle數據庫鏈接進程爲何不會crash,也許linux與windows
--//有一些不一樣.windows使用線程,而linux下使用進程.