.\" Man page generated from reStructuredText. . .TH "MONGOTOP" "1" "Oct 29, 2019" "4.2" "mongodb-manual" .SH NAME mongotop \- MongoDB Activity Monitor . .nr rst2man-indent-level 0 . .de1 rstReportMargin \\$1 \\n[an-margin] level \\n[rst2man-indent-level] level margin: \\n[rst2man-indent\\n[rst2man-indent-level]] - \\n[rst2man-indent0] \\n[rst2man-indent1] \\n[rst2man-indent2] .. .de1 INDENT .\" .rstReportMargin pre: . RS \\$1 . nr rst2man-indent\\n[rst2man-indent-level] \\n[an-margin] . nr rst2man-indent-level +1 .\" .rstReportMargin post: .. .de UNINDENT . RE .\" indent \\n[an-margin] .\" old: \\n[rst2man-indent\\n[rst2man-indent-level]] .nr rst2man-indent-level -1 .\" new: \\n[rst2man-indent\\n[rst2man-indent-level]] .in \\n[rst2man-indent\\n[rst2man-indent-level]]u .. .SS On this page .INDENT 0.0 .IP \(bu 2 \fI\%Description\fP .IP \(bu 2 \fI\%Availability\fP .IP \(bu 2 \fI\%Syntax\fP .IP \(bu 2 \fI\%Required Access\fP .IP \(bu 2 \fI\%Behavior\fP .IP \(bu 2 \fI\%Options\fP .IP \(bu 2 \fI\%Fields\fP .IP \(bu 2 \fI\%Examples\fP .IP \(bu 2 \fI\%Additional Information\fP .UNINDENT .INDENT 0.0 .INDENT 3.5 .IP "macOS Sierra and Go 1.6 Incompatibility" .sp Users running on macOS Sierra require the 3.2.10 or newer version of mongotop\&. .UNINDENT .UNINDENT .SH DESCRIPTION .sp \fI\%mongotop\fP provides a method to track the amount of time a MongoDB instance \fBmongod\fP spends reading and writing data. \fI\%mongotop\fP provides statistics on a per\-collection level. By default, \fI\%mongotop\fP returns values every second. .sp Run \fI\%mongotop\fP from the system command line, not the \fBmongo\fP shell. .SH AVAILABILITY .sp The \fI\%mongotop\fP tool is part of the MongoDB tools package. Consult the installation guide for your platform for instructions on how to install the tools package as part of your MongoDB installation. .sp The tools package is also available from the \fI\%MongoDB Download Center\fP, either as a separate \fBtools\fP download, or contained within the \fBTGZ\fP or \fBZIP\fP downloads, depending on platform. On Windows, the \fBMSI\fP installer includes all tools as part of the default installation. .INDENT 0.0 .INDENT 3.5 .SH TIP .sp If downloading the \fBTGZ\fP or \fBZIP\fP files from the Download Center, you may want to update your \fBPATH\fP environment variable to include the directory where you installed these tools. See the installation guide for your platform for more information. .UNINDENT .UNINDENT .SH SYNTAX .SS Default .INDENT 0.0 .INDENT 3.5 .sp .nf .ft C mongotop [frequency] .ft P .fi .UNINDENT .UNINDENT .sp You can run \fI\%mongotop\fP without any command\-line options to connect to the \fBmongod\fP instance running on the localhost port \fB27017\fP\&. By default, \fI\%mongotop\fP returns values every second. .INDENT 0.0 .INDENT 3.5 .sp .nf .ft C mongotop .ft P .fi .UNINDENT .UNINDENT .sp To have \fI\%mongotop\fP report every 30 seconds, specify the time: .INDENT 0.0 .INDENT 3.5 .sp .nf .ft C mongotop 30 .ft P .fi .UNINDENT .UNINDENT .sp When connected to a \fBmongod\fP instance, the program reports first on the connection and then reports on the statistics at the configured frequency. .INDENT 0.0 .INDENT 3.5 .sp .nf .ft C 2019\-04\-29T15:35:27.785\-0400 connected to: 127.0.0.1 ns total read write 81802ms 0ms 81802ms \&... .ft P .fi .UNINDENT .UNINDENT .SS Command Line Options .INDENT 0.0 .INDENT 3.5 .sp .nf .ft C mongotop [options] [frequency] .ft P .fi .UNINDENT .UNINDENT .sp You can run \fI\%mongotop\fP with various \fI\%command\-line options\fP\&. .sp For example, to connect \fI\%mongotop\fP to a \fBmongod\fP instance running on a remote host \fBmongodb0.example.com\fP and report every 30 seconds: .INDENT 0.0 .IP \(bu 2 You can include the desired frequency of reporting (in this example, 30 seconds) and the \fI\%\-\-uri\fP option to specify the host and port: .INDENT 2.0 .INDENT 3.5 .sp .nf .ft C mongotop 30 \-\-uri=\(aqmongodb://mongodb0.example.com:27017\(aq [additional options] .ft P .fi .UNINDENT .UNINDENT .sp If the \fBmongod\fP instance requires authentication, you can specify the user, password, and authentication database as part of the URI connection string: .INDENT 2.0 .INDENT 3.5 .sp .nf .ft C mongotop 30 \-\-uri=\(aqmongodb://user:password@mongodb0.example.com:27017/?authSource=admin\(aq [additional options] .ft P .fi .UNINDENT .UNINDENT .sp The user running \fI\%mongotop\fP must have the \fBserverStatus\fP and \fBtop\fP privileges. .sp For more information on the URI connection string, see \fI\%\-\-uri\fP\&. .IP \(bu 2 Alternatively, you can use the \fI\%\-\-host\fP and \fI\%\-\-port\fP options to specify the host and port: .INDENT 2.0 .INDENT 3.5 .sp .nf .ft C mongotop 30 \-\-host=mongodb0.example.com \-\-port=27017 [additional options] .ft P .fi .UNINDENT .UNINDENT .sp If the \fBmongod\fP instance requires authentication, you can specify the user \fI\%\-u\fP, and the authentication database \fI\%\-\-authenticationDatabase\fP\&. Omit the \fI\%\-\-password\fP option to have \fBmongoexport\fP prompt for the password. .INDENT 2.0 .INDENT 3.5 .sp .nf .ft C mongotop 30 \-\-host=mongodb0.example.com \-\-port=27017 \-u=user \-\-authenticationDatabase=admin [additional options] .ft P .fi .UNINDENT .UNINDENT .sp The user running \fI\%mongotop\fP must have the \fBserverStatus\fP and \fBtop\fP privileges. .UNINDENT .sp For more information on the options available, see \fI\%Options\fP\&. .sp When connected to a \fBmongod\fP instance, the program reports first on the connection and then reports on the statistics at the configured frequency. .INDENT 0.0 .INDENT 3.5 .sp .nf .ft C 2019\-04\-29T15:35:27.785\-0400 connected to: 127.0.0.1 ns total read write 81802ms 0ms 81802ms \&... .ft P .fi .UNINDENT .UNINDENT .SH REQUIRED ACCESS .sp In order to connect to a \fBmongod\fP that enforces authorization, the connecting user must have the \fBserverStatus\fP and \fBtop\fP privileges. .sp The built\-in role \fBclusterMonitor\fP provides these privileges. .SH BEHAVIOR .SS FIPS .sp Starting in version 4.2, MongoDB removes the \fB\-\-sslFIPSMode\fP option for mongotop\&. mongotop will use FIPS compliant connections to \fBmongod\fP/\fBmongos\fP if the \fBmongod\fP/\fBmongos\fP instances are configured to use FIPS mode\&. .SH OPTIONS .INDENT 0.0 .TP .B mongotop .UNINDENT .INDENT 0.0 .TP .B \-\-help Returns information on the options and use of \fBmongotop\fP\&. .UNINDENT .INDENT 0.0 .TP .B \-\-verbose, \-v Increases the amount of internal reporting returned on standard output or in log files. Increase the verbosity with the \fB\-v\fP form by including the option multiple times, (e.g. \fB\-vvvvv\fP\&.) .UNINDENT .INDENT 0.0 .TP .B \-\-quiet Runs \fBmongotop\fP in a quiet mode that attempts to limit the amount of output. .sp This option suppresses: .INDENT 7.0 .IP \(bu 2 output from database commands .IP \(bu 2 replication activity .IP \(bu 2 connection accepted events .IP \(bu 2 connection closed events .UNINDENT .UNINDENT .INDENT 0.0 .TP .B \-\-version Returns the \fBmongotop\fP release number. .UNINDENT .INDENT 0.0 .TP .B \-\-uri= New in version 3.4.6. .sp Specify a resolvable URI connection string (enclose in quotes) to connect to the MongoDB deployment. .INDENT 7.0 .INDENT 3.5 .sp .nf .ft C \-\-uri="mongodb://[username:password@]host1[:port1][,host2[:port2],...[,hostN[:portN]]][/[database][?options]]" .ft P .fi .UNINDENT .UNINDENT .sp For information on the components of the connection string, see the Connection String URI Format documentation. .sp \fBNOTE:\fP .INDENT 7.0 .INDENT 3.5 For TLS/SSL options, use the command\-line options instead of the URI options for TLS/SSL (Available starting in 4.2)\&. .UNINDENT .UNINDENT .sp \fBIMPORTANT:\fP .INDENT 7.0 .INDENT 3.5 The following command\-line options cannot be used in conjunction with \fI\%\-\-uri\fP option: .INDENT 0.0 .IP \(bu 2 \fI\%\-\-host\fP .IP \(bu 2 \fI\%\-\-port\fP .IP \(bu 2 \fI\%\-\-username\fP .IP \(bu 2 \fI\%\-\-password\fP (if the URI connection string also includes the password) .IP \(bu 2 \fI\%\-\-authenticationDatabase\fP .IP \(bu 2 \fI\%\-\-authenticationMechanism\fP .UNINDENT .sp Instead, specify these options as part of your \fI\%\-\-uri\fP connection string. .UNINDENT .UNINDENT .UNINDENT .INDENT 0.0 .TP .B \-\-host=<:port>, \-h=<:port> \fIDefault\fP: localhost:27017 .sp Specifies a resolvable hostname for the \fBmongod\fP to which to connect. By default, the \fBmongotop\fP attempts to connect to a MongoDB instance running on the localhost on port number \fB27017\fP\&. .sp To connect to a replica set, specify the \fBreplSetName\fP and a seed list of set members, as in the following: .INDENT 7.0 .INDENT 3.5 .sp .nf .ft C \-\-host=/<:port>,<:port>,<...> .ft P .fi .UNINDENT .UNINDENT .sp When specifying the replica set list format, \fBmongotop\fP always connects to the primary\&. .sp You can also connect to any single member of the replica set by specifying the host and port of only that member: .INDENT 7.0 .INDENT 3.5 .sp .nf .ft C \-\-host=<:port> .ft P .fi .UNINDENT .UNINDENT .sp Changed in version 3.0.0: If you use IPv6 and use the \fB
:\fP format, you must enclose the portion of an address and port combination in brackets (e.g. \fB[
]\fP). .sp \fBNOTE:\fP .INDENT 7.0 .INDENT 3.5 You cannot specify both \fI\%\-\-host\fP and \fI\%\-\-uri\fP\&. .UNINDENT .UNINDENT .sp If connected to a replica set where the primary is not reachable, \fBmongotop\fP returns an error message. .UNINDENT .INDENT 0.0 .TP .B \-\-port= \fIDefault\fP: 27017 .sp Specifies the TCP port on which the MongoDB instance listens for client connections. .sp \fBNOTE:\fP .INDENT 7.0 .INDENT 3.5 You cannot specify both \fI\%\-\-port\fP and \fI\%\-\-uri\fP\&. .UNINDENT .UNINDENT .UNINDENT .INDENT 0.0 .TP .B \-\-ipv6 \fIRemoved in version 3.0.\fP .sp Enables IPv6 support and allows \fBmongotop\fP to connect to the MongoDB instance using an IPv6 network. Prior to MongoDB 3.0, you had to specify \fI\%\-\-ipv6\fP to use IPv6. In MongoDB 3.0 and later, IPv6 is always enabled. .UNINDENT .INDENT 0.0 .TP .B \-\-ssl New in version 2.6. .sp Enables connection to a \fBmongod\fP or \fBmongos\fP that has TLS/SSL support enabled. .sp For more information about TLS/SSL and MongoDB, see /tutorial/configure\-ssl and /tutorial/configure\-ssl\-clients . .UNINDENT .INDENT 0.0 .TP .B \-\-sslCAFile= New in version 2.6. .sp Specifies the \fB\&.pem\fP file that contains the root certificate chain from the Certificate Authority. Specify the file name of the \fB\&.pem\fP file using relative or absolute paths. .sp Starting in version 3.4, if \fB\-\-tlsCAFile\fP/\fBnet.tls.CAFile\fP (or their aliases \fB\-\-sslCAFile\fP/\fBnet.ssl.CAFile\fP) is not specified and you are not using x.509 authentication, the system\-wide CA certificate store will be used when connecting to an TLS/SSL\-enabled server. .sp To use x.509 authentication, \fB\-\-tlsCAFile\fP or \fBnet.tls.CAFile\fP must be specified unless using \fB\-\-tlsCertificateSelector\fP or \fB\-\-net.tls.certificateSelector\fP\&. Or if using the \fBssl\fP aliases, \fB\-\-sslCAFile\fP or \fBnet.ssl.CAFile\fP must be specified unless using \fB\-\-sslCertificateSelector\fP or \fBnet.ssl.certificateSelector\fP\&. .sp \fBWARNING:\fP .INDENT 7.0 .INDENT 3.5 \fBVersion 3.2 and earlier:\fP For TLS/SSL connections (\fB\-\-ssl\fP) to \fBmongod\fP and \fBmongos\fP, if the \fBmongotop\fP runs without the \fI\%\-\-sslCAFile\fP, \fBmongotop\fP will not attempt to validate the server certificates. This creates a vulnerability to expired \fBmongod\fP and \fBmongos\fP certificates as well as to foreign processes posing as valid \fBmongod\fP or \fBmongos\fP instances. Ensure that you \fIalways\fP specify the CA file to validate the server certificates in cases where intrusion is a possibility. .UNINDENT .UNINDENT .sp For more information about TLS/SSL and MongoDB, see /tutorial/configure\-ssl and /tutorial/configure\-ssl\-clients . .UNINDENT .INDENT 0.0 .TP .B \-\-sslPEMKeyFile= New in version 2.6. .sp Specifies the \fB\&.pem\fP file that contains both the TLS/SSL certificate and key. Specify the file name of the \fB\&.pem\fP file using relative or absolute paths. .sp This option is required when using the \fI\%\-\-ssl\fP option to connect to a \fBmongod\fP or \fBmongos\fP that has \fBCAFile\fP enabled \fIwithout\fP \fBallowConnectionsWithoutCertificates\fP\&. .sp For more information about TLS/SSL and MongoDB, see /tutorial/configure\-ssl and /tutorial/configure\-ssl\-clients . .UNINDENT .INDENT 0.0 .TP .B \-\-sslPEMKeyPassword= New in version 2.6. .sp Specifies the password to de\-crypt the certificate\-key file (i.e. \fI\%\-\-sslPEMKeyFile\fP). Use the \fI\%\-\-sslPEMKeyPassword\fP option only if the certificate\-key file is encrypted. In all cases, the \fBmongotop\fP will redact the password from all logging and reporting output. .sp If the private key in the PEM file is encrypted and you do not specify the \fI\%\-\-sslPEMKeyPassword\fP option, the \fBmongotop\fP will prompt for a passphrase. See ssl\-certificate\-password\&. .sp For more information about TLS/SSL and MongoDB, see /tutorial/configure\-ssl and /tutorial/configure\-ssl\-clients . .UNINDENT .INDENT 0.0 .TP .B \-\-sslCRLFile= New in version 2.6. .sp Specifies the \fB\&.pem\fP file that contains the Certificate Revocation List. Specify the file name of the \fB\&.pem\fP file using relative or absolute paths. .sp For more information about TLS/SSL and MongoDB, see /tutorial/configure\-ssl and /tutorial/configure\-ssl\-clients . .UNINDENT .INDENT 0.0 .TP .B \-\-sslAllowInvalidCertificates New in version 2.6. .sp Bypasses the validation checks for server certificates and allows the use of invalid certificates. When using the \fBallowInvalidCertificates\fP setting, MongoDB logs as a warning the use of the invalid certificate. .sp Starting in MongoDB 4.0, if you specify \fB\-\-sslAllowInvalidCertificates\fP or \fBnet.ssl.allowInvalidCertificates: true\fP (or in MongoDB 4.2, the alias \fB\-\-tlsAllowInvalidateCertificates\fP or \fBnet.tls.allowInvalidCertificates: true\fP) when using x.509 authentication, an invalid certificate is only sufficient to establish a TLS/SSL connection but is \fIinsufficient\fP for authentication. .sp \fBWARNING:\fP .INDENT 7.0 .INDENT 3.5 Although available, avoid using the \fB\-\-sslAllowInvalidCertificates\fP option if possible. If the use of \fB\-\-sslAllowInvalidCertificates\fP is necessary, only use the option on systems where intrusion is not possible. .sp If the \fBmongo\fP shell (and other mongodb\-tools\-support\-ssl) runs with the \fB\-\-sslAllowInvalidCertificates\fP option, the \fBmongo\fP shell (and other mongodb\-tools\-support\-ssl) will not attempt to validate the server certificates. This creates a vulnerability to expired \fBmongod\fP and \fBmongos\fP certificates as well as to foreign processes posing as valid \fBmongod\fP or \fBmongos\fP instances. If you only need to disable the validation of the hostname in the TLS/SSL certificates, see \fB\-\-sslAllowInvalidHostnames\fP\&. .UNINDENT .UNINDENT .sp For more information about TLS/SSL and MongoDB, see /tutorial/configure\-ssl and /tutorial/configure\-ssl\-clients . .UNINDENT .INDENT 0.0 .TP .B \-\-sslAllowInvalidHostnames New in version 3.0. .sp Disables the validation of the hostnames in TLS/SSL certificates. Allows \fBmongotop\fP to connect to MongoDB instances even if the hostname in their certificates do not match the specified hostname. .sp For more information about TLS/SSL and MongoDB, see /tutorial/configure\-ssl and /tutorial/configure\-ssl\-clients . .UNINDENT .INDENT 0.0 .TP .B \-\-username=, \-u= Specifies a username with which to authenticate to a MongoDB database that uses authentication. Use in conjunction with the \fI\%\-\-password\fP and \fI\%\-\-authenticationDatabase\fP options. .sp \fBNOTE:\fP .INDENT 7.0 .INDENT 3.5 You cannot specify both \fI\%\-\-username\fP and \fI\%\-\-uri\fP\&. .UNINDENT .UNINDENT .UNINDENT .INDENT 0.0 .TP .B \-\-password=, \-p= Specifies a password with which to authenticate to a MongoDB database that uses authentication. Use in conjunction with the \fI\%\-\-username\fP and \fI\%\-\-authenticationDatabase\fP options. .sp Changed in version 3.0.2: To prompt the user for the password, pass the \fI\%\-\-username\fP option without \fI\%\-\-password\fP or specify an empty string as the \fI\%\-\-password\fP value, as in \fB\-\-password ""\fP . .sp \fBNOTE:\fP .INDENT 7.0 .INDENT 3.5 You cannot specify both \fI\%\-\-password\fP and \fI\%\-\-uri\fP\&. .UNINDENT .UNINDENT .UNINDENT .INDENT 0.0 .TP .B \-\-authenticationDatabase= Specifies the authentication database where the specified \fI\%\-\-username\fP has been created. See user\-authentication\-database\&. .sp \fBNOTE:\fP .INDENT 7.0 .INDENT 3.5 You cannot specify both \fI\%\-\-authenticationDatabase\fP and \fI\%\-\-uri\fP\&. .UNINDENT .UNINDENT .sp Changed in version 3.0.0: \fI\%\-\-authenticationDatabase\fP is required for \fBmongod\fP and \fBmongos\fP instances that use authentication\&. .UNINDENT .INDENT 0.0 .TP .B \-\-authenticationMechanism= \fIDefault\fP: SCRAM\-SHA\-1 .sp Specifies the authentication mechanism the \fBmongotop\fP instance uses to authenticate to the \fBmongod\fP or \fBmongos\fP\&. .sp Changed in version 4.0: MongoDB removes support for the deprecated MongoDB Challenge\-Response (\fBMONGODB\-CR\fP) authentication mechanism. .sp MongoDB adds support for SCRAM mechanism using the SHA\-256 hash function (\fBSCRAM\-SHA\-256\fP). .TS center; |l|l|. _ T{ Value T} T{ Description T} _ T{ SCRAM\-SHA\-1 T} T{ \fI\%RFC 5802\fP standard Salted Challenge Response Authentication Mechanism using the SHA\-1 hash function. T} _ T{ SCRAM\-SHA\-256 T} T{ \fI\%RFC 7677\fP standard Salted Challenge Response Authentication Mechanism using the SHA\-256 hash function. .sp Requires featureCompatibilityVersion set to \fB4.0\fP\&. .sp New in version 4.0. T} _ T{ MONGODB\-X509 T} T{ MongoDB TLS/SSL certificate authentication. T} _ T{ GSSAPI (Kerberos) T} T{ External authentication using Kerberos. This mechanism is available only in \fI\%MongoDB Enterprise\fP\&. T} _ T{ PLAIN (LDAP SASL) T} T{ External authentication using LDAP. You can also use \fBPLAIN\fP for authenticating in\-database users. \fBPLAIN\fP transmits passwords in plain text. This mechanism is available only in \fI\%MongoDB Enterprise\fP\&. T} _ .TE .sp \fBNOTE:\fP .INDENT 7.0 .INDENT 3.5 You cannot specify both \fI\%\-\-authenticationMechanism\fP and \fI\%\-\-uri\fP\&. .UNINDENT .UNINDENT .UNINDENT .INDENT 0.0 .TP .B \-\-gssapiServiceName= New in version 2.6. .sp Specify the name of the service using GSSAPI/Kerberos\&. Only required if the service does not use the default name of \fBmongodb\fP\&. .sp This option is available only in MongoDB Enterprise. .UNINDENT .INDENT 0.0 .TP .B \-\-gssapiHostName= New in version 2.6. .sp Specify the hostname of a service using GSSAPI/Kerberos\&. \fIOnly\fP required if the hostname of a machine does not match the hostname resolved by DNS. .sp This option is available only in MongoDB Enterprise. .UNINDENT .INDENT 0.0 .TP .B \-\-locks Toggles the mode of \fI\%mongotop\fP to report on use of per\-database locks\&. This data is only available when connected to a MongoDB 2.6 or older instance. .sp \fI\%\-\-locks\fP returns an error when called against a \fBmongod\fP 3.0 or newer instance that does not report per\-database lock usage. .UNINDENT .INDENT 0.0 .TP .B \-\-rowcount=, \-n= Number of lines of data that \fBmongotop\fP should print. "0 for indefinite" .UNINDENT .INDENT 0.0 .TP .B \-\-json New in version 3.0.0. .sp Returns output for \fBmongotop\fP in JSON format. .UNINDENT .INDENT 0.0 .TP .B The final argument is the length of time, in seconds, that \fBmongotop\fP waits in between calls. By default \fBmongotop\fP returns data every second. .UNINDENT .SH FIELDS .sp When connected to a \fBmongod\fP instance, the program reports first on the connection and then reports on the statistics at the configured frequency. \fI\%mongotop\fP returns time values specified in milliseconds (ms.) .INDENT 0.0 .INDENT 3.5 .sp .nf .ft C 2019\-04\-29T15:35:27.785\-0400 connected to: 127.0.0.1 ns total read write 81802ms 0ms 81802ms \&... ns total read write 0ms 0ms 0ms \&... .ft P .fi .UNINDENT .UNINDENT .sp \fI\%mongotop\fP only reports active namespaces or databases, depending on the \fI\%\-\-locks\fP option. If you don\(aqt see a database or collection, it has received no recent activity. You can issue a simple operation in the \fBmongo\fP shell to generate activity to affect the output of \fI\%mongotop\fP\&. .INDENT 0.0 .TP .B mongotop.ns Contains the database namespace, which combines the database name and collection. .sp If you use the \fI\%mongotop \-\-locks\fP, the \fI\%ns\fP field does not appear in the \fI\%mongotop\fP output. .UNINDENT .INDENT 0.0 .TP .B mongotop.db Contains the name of the database. The database named \fB\&.\fP refers to the global lock, rather than a specific database. .sp This field does not appear unless you have invoked \fI\%mongotop\fP with the \fI\%\-\-locks\fP option. .UNINDENT .INDENT 0.0 .TP .B mongotop.total Provides the total amount of time that this \fBmongod\fP spent operating on this namespace. .UNINDENT .INDENT 0.0 .TP .B mongotop.read Provides the amount of time that this \fBmongod\fP spent performing read operations on this namespace. .UNINDENT .INDENT 0.0 .TP .B mongotop.write Provides the amount of time that this \fBmongod\fP spent performing write operations on this namespace. .UNINDENT .INDENT 0.0 .TP .B mongotop. Provides a time stamp for the returned data. .UNINDENT .SH EXAMPLES .sp By default \fI\%mongotop\fP connects to the MongoDB instance running on the localhost port \fB27017\fP\&. However, \fI\%mongotop\fP can optionally connect to remote \fBmongod\fP instances. See the \fI\%mongotop options\fP for more information. .sp To force \fI\%mongotop\fP to return less frequently specify a number, in seconds at the end of the command. In this example, \fI\%mongotop\fP will return every 15 seconds. .INDENT 0.0 .INDENT 3.5 .sp .nf .ft C mongotop 15 .ft P .fi .UNINDENT .UNINDENT .sp This command produces the following output: .INDENT 0.0 .INDENT 3.5 .sp .nf .ft C 2019\-04\-29T15:35:27.785\-0400 connected to: 127.0.0.1 ns total read write 2019\-04\-29T15:35:57\-04:00 admin.system.roles 0ms 0ms 0ms admin.system.users 0ms 0ms 0ms admin.system.version 0ms 0ms 0ms config.system.sessions 0ms 0ms 0ms local.startup_log 0ms 0ms 0ms local.system.replset 0ms 0ms 0ms .ft P .fi .UNINDENT .UNINDENT .sp To return a \fI\%mongotop\fP report every 5 minutes, use the following command: .INDENT 0.0 .INDENT 3.5 .sp .nf .ft C mongotop 300 .ft P .fi .UNINDENT .UNINDENT .SH ADDITIONAL INFORMATION .sp For more information about monitoring MongoDB, see /administration/monitoring\&. .sp For additional background on various other MongoDB status outputs see: .INDENT 0.0 .IP \(bu 2 /reference/command/serverStatus .IP \(bu 2 /reference/command/replSetGetStatus .IP \(bu 2 /reference/command/dbStats .IP \(bu 2 /reference/command/collStats .UNINDENT .sp For an additional utility that provides MongoDB metrics see mongostat\&. .SH AUTHOR MongoDB Documentation Project .SH COPYRIGHT 2008-2019 .\" Generated by docutils manpage writer. .