Zimbra Collaboration Suite 7.0
Zimbra Collaboration Suite 7.0
Administrator's Guide
Open Source Edition


Monitoring Zimbra Servers > Monitoring Servers

Monitoring Servers
The ZCS server collects many performance-related statistics that can help you diagnose problems and load issues.
The Server Statistics Advanced Statistics tab includes advanced graphing options that lets you generate various charts based on statistical information for the CPU, IO, mailboxd, MTA queue, MySQL and other components.
To chart the graphics in the Server Statistics Advanced Statistics tab, select one of these groups and then select from the list of specific counters for the type of information to display.
The information covers a wide array of data:
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cpu.csv: CPU utilization. This group contains counters to keep track of CPU usage (iowait, idle, system, user, time etc.). CPU information can be tracked both at the server level and the process level.
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df.csv: Captures disk usage. Disk utilization is tracked for each disk partition.
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fd.csv: file descriptor count. Keeps track of system file descriptor usage over time. This is primarily used to track down “out-of-file descriptor” errors.
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mailboxd.csv: ZCS server and JVM statistics. Mailboxd stores almost all of its statistics here. Interesting numbers to keep track of are heap_used, heap_free, imap_conn, soap_sessions, pop_conn, db_conn_count.
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mtaqueue.csv: Postfix queue. This measures the mail queue size in number of messages and the size in bytes.
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proc.csv: Process statistics for Zimbra processes. For example mailboxd/java, MySQL, OpenLDAP, etc.)
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soap.csv: SOAP request processing time.
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threads.csv: JVM thread counts. Counts the number of threads with a common name prefix.
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vm.csv: Linux VM statistics (from the vmstat command).
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io-x.csv and io.csv store data from the iostat(1) command (io-x.csv with iostat -x).
You can also use zmstats CLI to view performance metrics and statistics. The CLI, zmstat-chart, can be used to generate charts from the .csv data. The data is read from the .csv files in /opt/zimbra/zmstat/<date>. Files created with zmstats-chart are in a standard CSV format that can be loaded into Excel for viewing and charting. See the Zimbra wiki article, Zmstats.