我试图部署hawq2.0，但无法运行hawqmaster。下面是错误日志：

[gpadmin@hdps31hwxworker2 hawqAdminLogs]$ cat  ~/hawqAdminLogs/hawq_init_20160805.log
20160805:23:00:10:050348 hawq_init:hdps31hwxworker2:gpadmin-[INFO]:-Prepare to do 'hawq init'
20160805:23:00:10:050348 hawq_init:hdps31hwxworker2:gpadmin-[INFO]:-You can find log in:
20160805:23:00:10:050348 hawq_init:hdps31hwxworker2:gpadmin-[INFO]:-/home/gpadmin/hawqAdminLogs/hawq_init_20160805.log
20160805:23:00:10:050348 hawq_init:hdps31hwxworker2:gpadmin-[INFO]:-GPHOME is set to:
20160805:23:00:10:050348 hawq_init:hdps31hwxworker2:gpadmin-[INFO]:-/usr/local/hawq/.
20160805:23:00:10:050348 hawq_init:hdps31hwxworker2:gpadmin-[DEBUG]:-Current user is 'gpadmin'
20160805:23:00:10:050348 hawq_init:hdps31hwxworker2:gpadmin-[DEBUG]:-Parsing config file:
20160805:23:00:10:050348 hawq_init:hdps31hwxworker2:gpadmin-[DEBUG]:-/usr/local/hawq/./etc/hawq-site.xml
20160805:23:00:10:050348 hawq_init:hdps31hwxworker2:gpadmin-[INFO]:-Init hawq with args: ['init', 'master']
20160805:23:00:10:050348 hawq_init:hdps31hwxworker2:gpadmin-[INFO]:-Check: hawq_master_address_host is set
20160805:23:00:10:050348 hawq_init:hdps31hwxworker2:gpadmin-[INFO]:-Check: hawq_master_address_port is set
20160805:23:00:10:050348 hawq_init:hdps31hwxworker2:gpadmin-[INFO]:-Check: hawq_master_directory is set
20160805:23:00:10:050348 hawq_init:hdps31hwxworker2:gpadmin-[INFO]:-Check: hawq_segment_directory is set
20160805:23:00:10:050348 hawq_init:hdps31hwxworker2:gpadmin-[INFO]:-Check: hawq_segment_address_port is set
20160805:23:00:10:050348 hawq_init:hdps31hwxworker2:gpadmin-[INFO]:-Check: hawq_dfs_url is set
20160805:23:00:10:050348 hawq_init:hdps31hwxworker2:gpadmin-[INFO]:-Check: hawq_master_temp_directory is set
20160805:23:00:10:050348 hawq_init:hdps31hwxworker2:gpadmin-[INFO]:-Check: hawq_segment_temp_directory is set
20160805:23:00:11:050348 hawq_init:hdps31hwxworker2:gpadmin-[INFO]:-Check if hdfs path is available
20160805:23:00:11:050348 hawq_init:hdps31hwxworker2:gpadmin-[DEBUG]:-Check hdfs: /usr/local/hawq/./bin/gpcheckhdfs hdfs hdpsm2demo4.demo.local:8020/hawq_default off
20160805:23:00:11:050348 hawq_init:hdps31hwxworker2:gpadmin-[WARNING]:-2016-08-05 23:00:11.338621, p50546, th139769637427168, WARNING the number of nodes in pipeline is 1 [172.17.15.31(172.17.15.31)], is less than the expected number of replica 3 for block [block pool ID: isi_hdfs_pool block ID 4341187780_1000] file /hawq_default/testFile
20160805:23:00:11:050348 hawq_init:hdps31hwxworker2:gpadmin-[INFO]:-1 segment hosts defined
20160805:23:00:11:050348 hawq_init:hdps31hwxworker2:gpadmin-[INFO]:-Set default_hash_table_bucket_number as: 6
20160805:23:00:17:050348 hawq_init:hdps31hwxworker2:gpadmin-[INFO]:-Start to init master
The files belonging to this database system will be owned by user "gpadmin".
This user must also own the server process.

The database cluster will be initialized with locale en_US.utf8.

fixing permissions on existing directory /data/hawq/master ... ok
creating subdirectories ... ok
selecting default max_connections ... 1280
selecting default shared_buffers/max_fsm_pages ... 125MB/200000
creating configuration files ... ok
creating template1 database in /data/hawq/master/base/1 ... 2016-08-05 22:00:18.554441 GMT,,,p50803,th-1212598144,,,,0,,,seg-10000,,,,,"WARNING","01000","""fsync"": can not be set by the user and will be ignored.",,,,,,,,"set_config_option","guc.c",10023,
ok
loading file-system persistent tables for template1 ...
2016-08-05 22:00:20.023594 GMT,,,p50835,th38852736,,,,0,,,seg-10000,,,,,"WARNING","01000","""fsync"": can not be set by the user and will be ignored.",,,,,,,,"set_config_option","guc.c",10023,
2016-08-05 23:00:20.126221 BST,,,p50835,th38852736,,,,0,,,seg-10000,,,,,"FATAL","XX000","could not create shared memory segment: Invalid argument (pg_shmem.c:183)","Failed system call was shmget(key=1, size=506213024, 03600).","This error usually means that PostgreSQL's request for a shared memory segment exceeded your kernel's SHMMAX parameter.  You can either reduce the request size or reconfigure the kernel with larger SHMMAX.  To reduce the request size (currently 506213024 bytes), reduce PostgreSQL's shared_buffers parameter (currently 4000) and/or its max_connections parameter (currently 3000).
If the request size is already small, it's possible that it is less than your kernel's SHMMIN parameter, in which case raising the request size or reconfiguring SHMMIN is called for.
The PostgreSQL documentation contains more information about shared memory configuration.",,,,,,"InternalIpcMemoryCreate","pg_shmem.c",183,1    0x87463a postgres errstart + 0x22a
2    0x74c5e6 postgres <symbol not found> + 0x74c5e6
3    0x74c7cd postgres PGSharedMemoryCreate + 0x3d
4    0x7976b6 postgres CreateSharedMemoryAndSemaphores + 0x336
5    0x880489 postgres BaseInit + 0x19
6    0x7b03bc postgres PostgresMain + 0xdbc
7    0x6c07d5 postgres main + 0x535
8    0x3c0861ed1d libc.so.6 __libc_start_main + 0xfd
9    0x4a14e9 postgres <symbol not found> + 0x4a14e9

child process exited with exit code 1
initdb: removing contents of data directory "/data/hawq/master"
Master postgres initdb failed
20160805:23:00:20:050348 hawq_init:hdps31hwxworker2:gpadmin-[INFO]:-Master postgres initdb failed
20160805:23:00:20:050348 hawq_init:hdps31hwxworker2:gpadmin-[ERROR]:-Master init failed, exit

这是在 Advanced gpcheck ```
[global]
configfile_version = 4

[linux.mount]
mount.points = /

[linux.sysctl]
sysctl.kernel.shmmax = 500000000
sysctl.kernel.shmmni = 4096
sysctl.kernel.shmall = 400000000
sysctl.kernel.sem = 250 512000 100 2048
sysctl.kernel.sysrq = 1
sysctl.kernel.core_uses_pid = 1
sysctl.kernel.msgmnb = 65536
sysctl.kernel.msgmax = 65536
sysctl.kernel.msgmni = 2048
sysctl.net.ipv4.tcp_syncookies = 0
sysctl.net.ipv4.ip_forward = 0
sysctl.net.ipv4.conf.default.accept_source_route = 0
sysctl.net.ipv4.tcp_tw_recycle = 1
sysctl.net.ipv4.tcp_max_syn_backlog = 200000
sysctl.net.ipv4.conf.all.arp_filter = 1
sysctl.net.ipv4.ip_local_port_range = 1281 65535
sysctl.net.core.netdev_max_backlog = 200000
sysctl.vm.overcommit_memory = 2
sysctl.fs.nr_open = 2000000
sysctl.kernel.threads-max = 798720
sysctl.kernel.pid_max = 798720

increase network

sysctl.net.core.rmem_max = 2097152
sysctl.net.core.wmem_max = 2097152

[linux.limits]
soft.nofile = 2900000
hard.nofile = 2900000
soft.nproc = 131072
hard.nproc = 131072

[linux.diskusage]
diskusage.monitor.mounts = /
diskusage.monitor.usagemax = 90%

[hdfs]
dfs.mem.namenode.heap = 40960
dfs.mem.datanode.heap = 6144

in hdfs-site.xml

dfs.support.append = true
dfs.client.enable.read.from.local = true
dfs.block.local-path-access.user = gpadmin
dfs.datanode.max.transfer.threads = 40960
dfs.client.socket-timeout = 300000000
dfs.datanode.socket.write.timeout = 7200000
dfs.namenode.handler.count = 60
ipc.server.handler.queue.size = 3300
dfs.datanode.handler.count = 60
ipc.client.connection.maxidletime = 3600000
dfs.namenode.accesstime.precision = -1

看起来它在抱怨内存问题，但我似乎找不到要改变的参数。在哪里 `shared_buffers` 以及 `max_connections` ?
一般来说，如何修复此错误？谢谢。