How about xlogs are missing and xlogs are deleted
[postgres@minion1 bin]$ pwd
/usr/local/pgtest/bin
[postgres@minion1 bin]$ ./pg_ctl -D ../data/ start
server starting
[postgres@minion1 bin]$ LOG: database system was shut down at 2016-02-04 16:26:41 CST
LOG: MultiXact member wraparound protections are now enabled
LOG: database system is ready to accept connections
LOG: autovacuum launcher started
[postgres@minion1 bin]$ ./pgbench -i -F 100 -s 714 -h 127.0.0.1 -p 5432 -U postgres -d postgres
[postgres@minion1 bin]$ ./psql -h localhost -U postgres -d postgres
psql (9.4.5)
Type "help" for help.
postgres=# \d+
List of relations
Schema | Name | Type | Owner | Size | Description
--------+------------------+-------+----------+---------+-------------
public | pgbench_accounts | table | postgres | 9147 MB |
public | pgbench_branches | table | postgres | 64 kB |
public | pgbench_history | table | postgres | 0 bytes |
public | pgbench_tellers | table | postgres | 344 kB |
(4 rows)
postgres=# \q
[postgres@minion1 bin]$ ./pg_controldata
pg_control version number: 942
Catalog version number: 201409291
Database system identifier: 6247349441268682644
Database cluster state: in production
pg_control last modified: Thu 04 Feb 2016 04:46:33 PM CST
Latest checkpoint location: 0/56A5CA8
Prior checkpoint location: 0/56A5C40
Latest checkpoint's REDO location: 0/56A5CA8
Latest checkpoint's REDO WAL file: 000000010000000000000005
Latest checkpoint's TimeLineID: 1
Latest checkpoint's PrevTimeLineID: 1
Latest checkpoint's full_page_writes: on
Latest checkpoint's NextXID: 0/1825
Latest checkpoint's NextOID: 16403
Latest checkpoint's NextMultiXactId: 1
Latest checkpoint's NextMultiOffset: 0
Latest checkpoint's oldestXID: 1801
Latest checkpoint's oldestXID's DB: 1
Latest checkpoint's oldestActiveXID: 0
Latest checkpoint's oldestMultiXid: 1
Latest checkpoint's oldestMulti's DB: 1
Time of latest checkpoint: Thu 04 Feb 2016 04:40:58 PM CST
Fake LSN counter for unlogged rels: 0/1
Minimum recovery ending location: 0/0
Min recovery ending loc's timeline: 0
Backup start location: 0/0
Backup end location: 0/0
End-of-backup record required: no
Current wal_level setting: minimal
Current wal_log_hints setting: off
Current max_connections setting: 100
Current max_worker_processes setting: 8
Current max_prepared_xacts setting: 0
Current max_locks_per_xact setting: 64
Maximum data alignment: 8
Database block size: 8192
Blocks per segment of large relation: 131072
WAL block size: 8192
Bytes per WAL segment: 16777216
Maximum length of identifiers: 64
Maximum columns in an index: 32
Maximum size of a TOAST chunk: 1996
Size of a large-object chunk: 2048
Date/time type storage: 64-bit integers
Float4 argument passing: by value
Float8 argument passing: by value
Data page checksum version: 0
[postgres@minion1 pg_xlog]$ ll
total 81M
-rw------- 1 postgres postgres 16M Feb 4 16:40 000000010000000000000005
-rw------- 1 postgres postgres 16M Feb 4 16:34 000000010000000000000006
-rw------- 1 postgres postgres 16M Feb 4 16:34 000000010000000000000007
-rw------- 1 postgres postgres 16M Feb 4 16:34 000000010000000000000008
-rw------- 1 postgres postgres 16M Feb 4 16:34 000000010000000000000009
drwx------ 2 postgres postgres 4.0K Feb 4 16:26 archive_status
[postgres@minion1 pg_xlog]$ rm -rf 00000001000000000000000*
[postgres@minion1 pg_xlog]$ ls
archive_status
[postgres@minion1 pg_xlog]$ cd -
/usr/local/pgtest/bin
[postgres@minion1 bin]$ ./pg_ctl -D ../data/ stop -m fast
waiting for server to shut down....LOG: received fast shutdown request
LOG: aborting any active transactions
LOG: autovacuum launcher shutting down
LOG: shutting down
LOG: database system is shut down
done
server stopped
[postgres@minion1 bin]$ ./pg_ctl -D ../data/ start
server starting
[postgres@minion1 bin]$ LOG: database system was shut down at 2016-02-04 16:50:58 CST
LOG: invalid magic number 0000 in log segment 000000010000000000000005, offset 0
LOG: invalid primary checkpoint record
LOG: invalid magic number 0000 in log segment 000000010000000000000005, offset 0
LOG: invalid secondary checkpoint record
PANIC: could not locate a valid checkpoint record
LOG: startup process (PID 2959) was terminated by signal 6: Aborted
LOG: aborting startup due to startup process failure
[postgres@minion1 bin]$ ./pg_resetxlog --help
pg_resetxlog resets the PostgreSQL transaction log.
Usage:
pg_resetxlog [OPTION]... DATADIR
Options:
-e XIDEPOCH set next transaction ID epoch
-f force update to be done
-l XLOGFILE force minimum WAL starting location for new transaction log
-m MXID,MXID set next and oldest multitransaction ID
-n no update, just show what would be done (for testing)
-o OID set next OID
-O OFFSET set next multitransaction offset
-V, --version output version information, then exit
-x XID set next transaction ID
-?, --help show this help, then exit
Report bugs to <pgsql-bugs@postgresql.org>.
[postgres@minion1 bin]$ ./pg_resetxlog -o 16403 -x 1825 -f /usr/local/pgtest/data/
Transaction log reset
[postgres@minion1 bin]$ ./pg_ctl -D ../data/ start
server starting
[postgres@minion1 bin]$ LOG: database system was shut down at 2016-02-04 16:55:44 CST
LOG: MultiXact member wraparound protections are now enabled
LOG: database system is ready to accept connections
LOG: autovacuum launcher started
[postgres@minion1 bin]$ ./psql -h localhost -U postgres -d postgres
psql (9.4.5)
Type "help" for help.
postgres=# \d+
List of relations
Schema | Name | Type | Owner | Size | Description
--------+------------------+-------+----------+---------+-------------
public | pgbench_accounts | table | postgres | 9147 MB |
public | pgbench_branches | table | postgres | 64 kB |
public | pgbench_history | table | postgres | 0 bytes |
public | pgbench_tellers | table | postgres | 344 kB |
(4 rows)
[postgres@minion1 bin]$ ./pg_controldata
pg_control version number: 942
Catalog version number: 201409291
Database system identifier: 6247349441268682644
Database cluster state: in production
pg_control last modified: Thu 04 Feb 2016 04:56:11 PM CST
Latest checkpoint location: 0/6000028
Prior checkpoint location: 0/0
Latest checkpoint's REDO location: 0/6000028
Latest checkpoint's REDO WAL file: 000000010000000000000006
Latest checkpoint's TimeLineID: 1
Latest checkpoint's PrevTimeLineID: 1
Latest checkpoint's full_page_writes: on
Latest checkpoint's NextXID: 0/1825
Latest checkpoint's NextOID: 16403
Latest checkpoint's NextMultiXactId: 1
Latest checkpoint's NextMultiOffset: 0
Latest checkpoint's oldestXID: 2294969121
Latest checkpoint's oldestXID's DB: 0
Latest checkpoint's oldestActiveXID: 0
Latest checkpoint's oldestMultiXid: 1
Latest checkpoint's oldestMulti's DB: 1
Time of latest checkpoint: Thu 04 Feb 2016 04:55:44 PM CST
Fake LSN counter for unlogged rels: 0/1
Minimum recovery ending location: 0/0
Min recovery ending loc's timeline: 0
Backup start location: 0/0
Backup end location: 0/0
End-of-backup record required: no
Current wal_level setting: minimal
Current wal_log_hints setting: off
Current max_connections setting: 100
Current max_worker_processes setting: 8
Current max_prepared_xacts setting: 0
Current max_locks_per_xact setting: 64
Maximum data alignment: 8
Database block size: 8192
Blocks per segment of large relation: 131072
WAL block size: 8192
Bytes per WAL segment: 16777216
Maximum length of identifiers: 64
Maximum columns in an index: 32
Maximum size of a TOAST chunk: 1996
Size of a large-object chunk: 2048
Date/time type storage: 64-bit integers
Float4 argument passing: by value
Float8 argument passing: by value
Data page checksum version: 0
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