CheckClusterState (Checks the openGauss status.)
- |
-openGauss or openGauss instances are not started.
- |
-Run the following command to start openGauss and instances:
-gs_om -t start
- |
-
-The status of openGauss or openGauss instances is abnormal.
- |
-Check the status of hosts and instances. Troubleshoot this issue based on the status information.
-gs_check -i CheckClusterState
- |
-
-CheckDBParams (Checks database parameters.)
- |
-Database parameters have incorrect values.
- |
-Use the gs_guc tool to set the parameters to specified values.
- |
-
-CheckDebugSwitch (Checks debug logs.)
- |
-The log level is incorrect.
- |
-Use the gs_guc tool to set log_min_messages to specified content.
- |
-
-CheckDirPermissions (Checks directory permissions.)
- |
-The permission for a directory is incorrect.
- |
-Change the directory permission to a specified value (750 or 700).
-chmod 750 DIR
- |
-
-CheckReadonlyMode (Checks the read-only mode.)
- |
-The read-only mode is enabled.
- |
-Verify that the usage of the disk where database nodes are located does not exceed the threshold (60% by default) and no other O&M operations are performed.
-gs_check -i CheckDataDiskUsage
-ps ux
-Use the gs_guc tool to disable the read-only mode of openGauss.
-gs_guc reload -N all -I all -c 'default_transaction_read_only = off'
-gs_guc reload -N all -I all -c 'default_transaction_read_only = off'
- |
-
-CheckEnvProfile (Checks environment variables.)
- |
-Environment variables are inconsistent.
- |
-Update the environment variable information.
- |
-
-CheckBlockdev (Checks pre-read blocks.)
- |
-The size of a pre-read block is not 16384 KB.
- |
-Use the gs_checkos tool to set the size of the pre-read block to 16384 KB and write the setting into the auto-startup file.
-gs_checkos -i B3
- |
-
-CheckCursorNum (Checks the number of cursors.)
- |
-The number of cursors fails to be checked.
- |
-Check whether the database is properly connected and whether the openGauss status is normal.
- |
-
-CheckPgxcgroup (Checks the data redistribution status.)
- |
-There are pgxc_group tables that have not been redistributed.
- |
-Proceed with the redistribution.
-gs_expand, gs_shrink
- |
-
-CheckDiskFormat (Checks disk configurations.)
- |
-Disk configurations are inconsistent between nodes.
- |
-Configure disk specifications to be consistent between nodes.
- |
-
-CheckSpaceUsage (Checks the disk space usage.)
- |
-Disk space is insufficient.
- |
-Clear or expand the disk for the directory.
- |
-
-CheckInodeUsage (Checks the disk index usage.)
- |
-Disk indexes are insufficient.
- |
-Clear or expand the disk for the directory.
- |
-
-CheckSwapMemory (Checks the swap memory.)
- |
-The swap memory is greater than the physical memory.
- |
-Reduce or disable the swap memory.
- |
-
-CheckLogicalBlock (Checks logical blocks.)
- |
-The size of a logical block is not 512 KB.
- |
-Use the gs_checkos tool to set the size of the logical block to 512 KB and write the setting into the auto-startup file.
-gs_checkos -i B4
- |
-
-CheckIOrequestqueue (Checks I/O requests.)
- |
-The requested I/O is not 32768.
- |
-Use the gs_checkos tool to set the requested I/O to 32768 and write the setting into the auto-startup file.
-gs_checkos -i B4
- |
-
-CheckCurConnCount (Checks the number of current connections.)
- |
-The number of current connections exceeds 90% of the allowed maximum number of connections.
- |
-Break idle primary database node connections.
- |
-
-CheckMaxAsyIOrequests (Checks the maximum number of asynchronous requests.)
- |
-The maximum number of asynchronous requests is less than 104857600 or (Number of database instances on the current node x 1048576).
- |
-Use the gs_checkos tool to set the maximum number of asynchronous requests to the larger one between 104857600 and (Number of database instances on the current node x 1048576).
-gs_checkos -i B4
- |
-
-CheckMTU (Checks MTU values.)
- |
-MTU values are inconsistent between nodes.
- |
-Set the MTU value on each node to 1500 or 8192.
-ifconfig eth* MTU 1500
- |
-
-CheckIOConfigure (Checks I/O configurations.)
- |
-The I/O mode is not deadline.
- |
-Use the gs_checkos tool to set the I/O mode to deadline and write the setting into the auto-startup file.
-gs_checkos -i B4
- |
-
-CheckRXTX (Checks the RX/TX value.)
- |
-The NIC RX/TX value is not 4096.
- |
-Use the checkos tool to set the NIC RX/TX value to 4096 for openGauss.
-gs_checkos -i B5
- |
-
-CheckPing (Checks whether the network connection is normal.)
- |
-There are openGauss IP addresses that cannot be pinged.
- |
-Check the network settings, network status, and firewall status between the abnormal IP addresses.
- |
-
-CheckNetWorkDrop (Checks the network packet loss rate.)
- |
-The network packet loss rate is greater than 1%.
- |
-Check the network load and status between the corresponding IP addresses.
- |
-
-CheckMultiQueue (Checks the NIC multi-queue function.)
- |
-Multiqueue is not enabled for the NIC, and NIC interruptions are not bound to different CPU cores.
- |
-Enable multiqueue for the NIC, and bind NIC interruptions to different CPU cores.
- |
-
-CheckEncoding (Checks the encoding format.)
- |
-Encoding formats are inconsistent between nodes.
- |
-Write the same encoding format into /etc/profile for each node.
-echo "export LANG=XXX" >> /etc/profile
- |
-
-CheckActQryCount (Checks the archiving mode.)
- |
-The archiving mode is enabled, and the archiving directory is not under the primary database node directory.
- |
-Disable archiving mode or set the archiving directory to be under the primary database node directory.
- |
-
-CheckFirewall (Checks the firewall.)
- |
-The firewall is enabled.
- |
-Disable the firewall.
-redHat(CentOS)7.x: systemctl status firewalld.service
-redHat(CentOS)6.x: service iptables down
-SuSE: SuSEfirewall2 down
- |
-
-CheckKernelVer (Checks kernel versions.)
- |
-Kernel versions are inconsistent between nodes.
- |
-Use the gs_replace tool to replace the nodes whose kernel version is inconsistent with that of others.
-gs_replace
- |
-
-CheckMaxHandle (Checks the maximum number of file handles.)
- |
-The maximum number of handles is less than 1000000.
- |
-Set the soft and hard limits in the 91-nofile.conf or 90-nofile.conf file to 1000000.
-gs_checkos -i B2
- |
-
-CheckNTPD (Checks the time synchronization service.)
- |
-The NTPD service is disabled or the time difference is greater than 1 minute.
- |
-Enable the NTPD service and set the time to be consistent.
- |
-
-CheckOSVer (Checks OS versions.)
- |
-Certain OSs are not supported or the OSs are not in the same hybrid list.
- |
-Use gs_replace to replace abnormal nodes with those supported by OSs or those in the same hybrid list.
-gs_replace
- |
-
-CheckSysParams (Checks OS parameters.)
- |
-OS parameter settings do not meet requirements.
- |
-Use the gs_checkos tool or manually set parameters to values meeting requirements.
-gs_checkos -i B1
-vim /etc/sysctl.conf
- |
-
-CheckTHP (Checks the THP service.)
- |
-The THP service is disabled.
- |
-Use the gs_checkos to enable the THP service.
-gs_checkos -i B6
- |
-
-CheckTimeZone (Checks time zones.)
- |
-Time zones are inconsistent between nodes.
- |
-Set time zones to be consistent between nodes.
-cp /usr/share/zoneinfo/$primary time zone/$secondary time zone /etc/localtime
- |
-
-CheckCPU (Checks the CPU.)
- |
-CPU usage is high or I/O waiting time is too long.
- |
-Upgrade CPUs or improve disk performance.
- |
-
-CheckSshdService (Checks the SSHD service.)
- |
-The SSHD service is disabled.
- |
-Enable the SSHD service and write the setting into the auto-startup file.
-server sshd start
-echo "server sshd start" >> initFile
- |
-
-CheckSshdConfig (Checks SSHD configurations.)
- |
-The SSHD service is incorrectly configured.
- |
-Reconfigure the SSHD service.
-PasswordAuthentication=no;
-MaxStartups=1000;
-UseDNS=yes;
-ClientAliveInterval=10800/ClientAliveInterval=0
-Restart the service.
-server sshd start
- |
-
-CheckCrondService (Checks the Crond service.)
- |
-The Crond service is disabled.
- |
-Install and enable the Crond service.
- |
-
-CheckStack (Checks the stack size.)
- |
-The stack size is less than 3072.
- |
-Use the gs_checkos tool to set the stack size to 3072 and restart the processes with a smaller stack size.
-gs_checkos -i B2
- |
-
-CheckNoCheckSum (Checks the NoCheckSum parameter.)
- |
-NoCheckSum is incorrectly set or its value is inconsistent on each node.
- |
-Set NoCheckSum to a consistent value on each node. If redHat6.4 or redHat6.5 with the NIC binding mode bond0 exists, set NoCheckSum to Y. In other cases, set it to N.
-echo Y > /sys/module/sctp/parameters/no_checksums
- |
-
-CheckSysPortRange (Checks OS port configurations.)
- |
-OS IP ports are not within the required port range or openGauss ports are within the OS IP port range.
- |
-Set the OS IP ports within 26000 to 65535 and set the openGauss ports beyond the OS IP port range.
-vim /etc/sysctl.conf
- |
-
-CheckMemInfo (Checks the memory information.)
- |
-Memory sizes are inconsistent between nodes.
- |
-Use physical memory of the same specifications between nodes.
- |
-
-CheckHyperThread (Checks the hyper-threading.)
- |
-The CPU hyper-threading is disabled.
- |
-Enable the CPU hyper-threading.
- |
-
-CheckTableSpace (Checks tablespaces.)
- |
-The tablespace path is nested with the openGauss path or nested with the path of another tablespace.
- |
-Migrate tablespace data to the tablespace with a valid path.
- |
-
-CheckSctpService (Checks the SCTP service.)
- |
-The SCTP service is disabled.
- |
-Install and enable the SCTP service.
-modprobe sctp
- |
-
-
-
-
-**Table 1** Installation process description
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-