remove memory context switch and add PgGate_ResetMemctx and PgGate_DestroyMemctx to mcxt

[johnfangAFW]

Tested:

2022-11-14 07:54:11.899 [unknown] [unknown] localhost 140523833519424 0[0:0#0] [BACKEND] LOG: PgGateAPI: PgGate_FinishInitDB() 2022-11-14 07:54:11.910 [unknown] [unknown] localhost 140523833519424 0[0:0#0] [BACKEND] LOG: PgGateAPI: PgGate_CommitTransaction 2022-11-14 07:54:11.915 [unknown] [unknown] localhost 140523833519424 0[0:0#0] [BACKEND] LOG: shutting down 2022-11-14 07:54:11.980 [unknown] [unknown] localhost 140523833519424 0[0:0#0] [BACKEND] LOG: will do full checkpoint, need flush 0 pages. 2022-11-14 07:54:11.980 [unknown] [unknown] localhost 140523833519424 0[0:0#0] [SLRU] LOG: remove old segments(<0) under pg_csnlog 2022-11-14 07:54:11.980 [unknown] [unknown] localhost 140523833519424 0[0:0#0] [BACKEND] LOG: truncate CSN log oldestXact 4, next xid 359 2022-11-14 07:54:11.981 [unknown] [unknown] localhost 140523833519424 0[0:0#0] [SLRU] LOG: remove old segments(<0) under pg_multixact/offsets 2022-11-14 07:54:11.981 [unknown] [unknown] localhost 140523833519424 0[0:0#0] [SLRU] LOG: remove old segments(<0) under pg_multixact/members 2022-11-14 07:54:12.013 [unknown] [unknown] localhost 140523833519424 0[0:0#0] [DBL_WRT] LOG: [batch flush] DW truncate end: file_head[dwn 0, start 1], total_pages 0 2022-11-14 07:54:12.013 [unknown] [unknown] localhost 140523833519424 0[0:0#0] [DBL_WRT] LOG: [single flush] DW truncate end: file_head[dwn 1, start 0], total_pages 0 2022-11-14 07:54:12.016 [unknown] [unknown] localhost 140523833519424 0[0:0#0] [BACKEND] LOG: keep all the xlog segments, because current segno = 1, less than wal_keep_segments = 16 2022-11-14 07:54:12.016 [unknown] [unknown] localhost 140523833519424 0[0:0#0] [BACKEND] LOG: CreateCheckPoint PrintCkpXctlControlFile: [checkPoint] oldCkpLoc:0/1000028, oldRedo:0/1000028, newCkpLoc:0/10000A8, newRedo:0/10000A8, preCkpLoc:0/0 2022-11-14 07:54:12.016 [unknown] [unknown] localhost 140523833519424 0[0:0#0] [BACKEND] LOG: will update control file (create checkpoint), shutdown:1 2022-11-14 07:54:12.081 [unknown] [unknown] localhost 140523833519424 0[0:0#0] [DBL_WRT] LOG: Double write exit 2022-11-14 07:54:12.081 [unknown] [unknown] localhost 140523833519424 0[0:0#0] [DBL_WRT] LOG: [single flush] DW truncate end: file_head[dwn 1, start 0], total_pages 0 2022-11-14 07:54:12.081 [unknown] [unknown] localhost 140523833519424 0[0:0#0] [DBL_WRT] LOG: Double write exit 2022-11-14 07:54:12.113 [unknown] [unknown] localhost 140523833519424 0[0:0#0] [DBL_WRT] LOG: [batch flush] DW truncate end: file_head[dwn 0, start 1], total_pages 0 2022-11-14 07:54:12.115 [unknown] [unknown] localhost 140523833519424 0[0:0#0] [BACKEND] LOG: database system is shut down 2022-11-14 07:54:12.152 [unknown] [unknown] localhost 140523833519424 0[0:0#0] [BACKEND] LOG: FiniNuma allocIndex: 0. k2pg_pclose_check exitstatus: 0 ok Write version file base/1 ... Create PG default temp dir ... Setup auth ... initializing pg_authid ... "/opt/opengauss/bin/gaussdb" --single --localxid -F -O -c search_path=pg_catalog -c exit_on_error=true template1 >/dev/null 2>&1 k2pg_pclose_check exitstatus: 0 ok get_set_pwd setting password ... k2pg_pclose_check exitstatus: 0 ok Setup depend,load plpgsql, and system views ... initializing dependencies ... k2pg_pclose_check exitstatus: 0 ok loading PL/pgSQL server-side language ... k2pg_pclose_check exitstatus: 0 ok creating system views ... k2pg_pclose_check exitstatus: 0 ok Setup perf views ... creating performance views ... k2pg_pclose_check exitstatus: 0 ok Setup description ... loading system objects' descriptions ... k2pg_pclose_check exitstatus: 0 ok Setup collation ... creating collations ... k2pg_pclose_check exitstatus: 0 ok Setup privileges ... setting privileges on built-in objects ... k2pg_pclose_check exitstatus: 0 ok Setup bucketmap len ... initialize global configure for bucketmap length ... k2pg_pclose_check exitstatus: 0 ok Setup schema ... creating information schema ... k2pg_pclose_check exitstatus: 0 k2pg_pclose_check exitstatus: 0 ok Load supported extension ... loading foreign-data wrapper for distfs access ... k2pg_pclose_check exitstatus: 0 ok loading foreign-data wrapper for hdfs access ... k2pg_pclose_check exitstatus: 0 ok loading foreign-data wrapper for k2 access ... k2pg_pclose_check exitstatus: 0 ok loading foreign-data wrapper for log access ... k2pg_pclose_check exitstatus: 0 ok loading hstore extension ... k2pg_pclose_check exitstatus: 0 ok loading foreign-data wrapper for MOT access ... k2pg_pclose_check exitstatus: 0 ok loading security plugin ... k2pg_pclose_check exitstatus: 0 ok Load update ... update system tables ... k2pg_pclose_check exitstatus: 0 ok creating snapshots catalog ... k2pg_pclose_check exitstatus: 0 k2pg_pclose_check exitstatus: 0 k2pg_pclose_check exitstatus: 0 k2pg_pclose_check exitstatus: 0 k2pg_pclose_check exitstatus: 0 k2pg_pclose_check exitstatus: 0 ok Make template0 ... copying template1 to template0 ... k2pg_pclose_check exitstatus: 0 ok Make postgres ... copying template1 to postgres ... k2pg_pclose_check exitstatus: 0 ok freezing database template0 ... k2pg_pclose_check exitstatus: 256 gs_initdb: data directory "/opt/opengauss/data/single_node" not removed at user's request