three collection tool for greenplum:pstack、strace、gcore.         

                                                                          

[gpadmin@gtlions5913 ~]$ ps -ef | grep postgres|grep data|grep master|grep -v grep

gpadmin   3653     1  0 May21 ?        00:00:00 /usr/local/greenplum-db-4.2.5.2/bin/postgres -D /data/master/gpseg-1 -p 5432 -b 1 -z 2 --silent-mode=true -i -M master -C -1 -x 0 -E

[gpadmin@gtlions5913 ~]$ pstack 3653

#0  0x00000034104ce183 in __select_nocancel () from /lib64/libc.so.6

#1  0x000000000087a63b in PostmasterMain ()

#2  0x000000000077ff3a in main ()

Copy the output to a file,or usage: pstack 3653 >pstack-gp.txt .

[gpadmin@gtlions5913 ~]$ strace -p 3653

Process 3653 attached - interrupt to quit

select(5, [3 4], NULL, NULL, {7, 897000}) = 0 (Timeout)

rt_sigprocmask(SIG_SETMASK, ~[ILL TRAP ABRT BUS FPE SEGV CONT SYS RTMIN RT_1], NULL, 8) = 0

rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0

select(5, [3 4], NULL, NULL, {60, 0} <unfinished ...>

Process 3653 detached

You must hole for at least 30 seconds and use "ctrl+c" to terminate. Copy the output to a file.

[gpadmin@gtlions5913 ~]$ gcore 3653

'import site' failed; use -v for traceback

Traceback (most recent call last):

  File "<string>", line 27, in ?

ImportError: No module named os.path

[Thread debugging using libthread_db enabled]

warning: no loadable sections found in added symbol-file system-supplied DSO at 0x7fffea126000

0x00000034104ce183 in __select_nocancel () from /lib64/libc.so.6

Saved corefile core.3653

-EOF-

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