qshape - Print Postfix queue domain and age distribution
] [-m min_subdomains
[ -b bucket_count
] [-t bucket_time
] [-w terminal_width
[ -N batch_msg_count
] [-n batch_top_domains
[ -c config_directory
program helps the administrator understand the Postfix queue
message distribution in time and by sender domain or recipient domain. The
program needs read access to the queue directories and queue files, so it must
run as the superuser or the mail_owner
specified in main.cf
- Display the sender domain distribution instead of the recipient domain
distribution. By default the recipient distribution is displayed. There
can be more recipients than messages, but as each message has only one
sender, the sender distribution is a message distribution.
- Generate aggregate statistics for parent domains. Top level domains are
not shown, nor are domains with fewer than min_subdomains
subdomains. The names of parent domains are shown with a leading dot,
- -m min_subdomains
- When used with the -p option, sets the minimum subdomain count
needed to show a separate line for a parent domain. The default is 5.
- -b bucket_count
- The age distribution is broken up into a sequence of geometrically
increasing intervals. This option sets the number of intervals or
"buckets". Each bucket has a maximum queue age that is twice as
large as that of the previous bucket. The last bucket has no age
- -t bucket_time
- The age limit in minutes for the first time bucket. The default value is
5, meaning that the first bucket counts messages between 0 and 5 minutes
- Instead of using a geometric age sequence, use a linear age sequence, in
other words simple multiples of bucket_time.
This feature is available in Postfix 2.2 and later.
- -w terminal_width
- The output is right justified, with the counts for the last bucket shown
on the 80th column, the terminal_width can be adjusted for wider
screens allowing more buckets to be displayed without truncating the
domain names on the left. When a row for a full domain name and its
counters does not fit in the specified number of columns, only the last 17
bytes of the domain name are shown with the prefix replaced by a '+'
character. Truncated parent domain rows are shown as '.+' followed by the
last 16 bytes of the domain name. If this is still too narrow to show the
domain name and all the counters, the terminal_width limit is
- -N batch_msg_count
- When the output device is a terminal, intermediate results are shown each
"batch_msg_count" messages. This produces usable results in a
reasonable time even when the deferred queue is large. The default is to
show intermediate results every 1000 messages.
- -n batch_top_domains
- When reporting intermediate or final results to a termainal, report only
the top "batch_top_domains" domains. The default limit is 20
- -c config_directory
- The main.cf configuration file is in the named directory instead of
the default configuration directory.
- By default qshape displays the combined distribution of the
incoming and active queues. To display a different set of queues, just
list their directory names on the command line. Absolute paths are used as
is, other paths are taken relative to the main.cf
queue_directory parameter setting. While main.cf supports
the use of $variable expansion in the definition of the
queue_directory parameter, the qshape program does not. If
you must use variable expansions in the queue_directory setting,
you must specify an explicit absolute path for each queue subdirectory
even if you want the default incoming and active queue distribution.
mailq(1), List all messages in the queue.
QSHAPE_README Examples and background material.
$config_directory/main.cf, Postfix installation parameters.
$queue_directory/maildrop/, local submission directory.
$queue_directory/incoming/, new message queue.
$queue_directory/hold/, messages waiting for tech support.
$queue_directory/active/, messages scheduled for delivery.
$queue_directory/deferred/, messages postponed for later delivery.
The Secure Mailer license must be distributed with this software.