127 lines
3.9 KiB
Perl
Executable File
127 lines
3.9 KiB
Perl
Executable File
#!/usr/bin/perl
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use charnames ':full'; # only necessary before v5.16
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use strict;
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use v5.24;
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use warnings;
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use autodie;
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use DBIx::SimpleConnect;
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use Encode qw(:fallbacks encode);
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use Getopt::Long;
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use Pod::Usage;
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use POSIX qw(strftime);
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my $db = "default";
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my $dir = ".";
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GetOptions(
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'dbname=s' => \$db,
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'directory=s' => \$dir,
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) or pod2usage(1);
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binmode STDOUT, ":encoding(UTF-8)";
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{
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no autodie;
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unless (chdir($dir)) {
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# if at first we don't succeed ...
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mkdir $dir or die "cannot create $dir: $!";
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chdir $dir or die "cannot chdir to $dir: $!";
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}
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}
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my $errorfile = strftime("%Y-%m-%d %H:%M:%S%z.err", localtime);
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open STDERR, ">:encoding(UTF-8)", $errorfile;
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my $dbh = DBIx::SimpleConnect->connect($db, {RaiseError => 1, PrintError => 0});
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# this is intended to run from cron, so limit the time it can run.
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$dbh->do("set statement_timeout to 30000");
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my $overview
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= $dbh->selectall_hashref("
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select schemaname, tablename,
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sum(pg_total_relation_size(quote_ident(schemaname) || '.' || quote_ident(tablename))) as total_size,
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sum(pg_table_size(quote_ident(schemaname) || '.' || quote_ident(tablename))) as table_size,
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sum(pg_indexes_size(quote_ident(schemaname) || '.' || quote_ident(tablename))) as indexes_size
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from pg_tables
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group by rollup (schemaname, tablename)
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",
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['schemaname', 'tablename']
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);
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open(my $fh, ">:encoding(UTF-8)", "index.html.$$");
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print_header($fh);
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say $fh "<h1>Disk usage for database $db</h1>";
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say $fh "<div class='timestamp'>", strftime("%Y-%m-%d %H:%M:%S%z", localtime), "</div>";
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say $fh "<table>";
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say $fh "<tr class='header'>";
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say $fh "<th class='name'>", "Schema", "</th>";
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say $fh "<th class='name'>", "Table", "</th>";
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say $fh "<th class='num'>", "Total size (bytes)", "</th>";
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say $fh "<th class='num'>", "Table size (bytes)", "</th>";
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say $fh "<th class='num'>", "Indexes size (bytes)", "</th>";
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say $fh "</tr>";
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for my $s (sort { $overview->{$b}{''}{total_size} <=> $overview->{$a}{''}{total_size} } keys $overview->%*) {
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say $fh "<tr class='schema'>";
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say $fh "<td class='name'>", escape($s), "</td>";
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say $fh "<td class='name'>", '', "</td>";
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say $fh "<td class='num'>", pretty($overview->{$s}{''}{total_size}), "</td>";
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say $fh "<td class='num'>", pretty($overview->{$s}{''}{table_size}), "</td>";
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say $fh "<td class='num'>", pretty($overview->{$s}{''}{indexes_size}), "</td>";
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say $fh "</tr>";
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for my $t (sort { $overview->{$s}{$b}{total_size} <=> $overview->{$s}{$a}{total_size} } keys $overview->{$s}->%*) {
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next unless $t; # schema - we already have that
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say $fh "<tr class='table'>";
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say $fh "<td class='name'>", escape($s), "</td>";
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say $fh "<td class='name'>", escape($t), "</td>";
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say $fh "<td class='num'>", pretty($overview->{$s}{$t}{total_size}), "</td>";
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say $fh "<td class='num'>", pretty($overview->{$s}{$t}{table_size}), "</td>";
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say $fh "<td class='num'>", pretty($overview->{$s}{$t}{indexes_size}), "</td>";
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say $fh "</tr>";
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}
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}
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say $fh "</table>";
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close($fh);
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rename "index.html.$$", "index.html";
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unlink($errorfile); # if we get here, we are fine
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exit(0);
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sub pretty {
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my ($n) = @_;
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while ($n =~ /[0-9]{4}/) {
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$n =~ s/([0-9]+)([0-9]{3})/$1\N{NARROW NO-BREAK SPACE}$2/;
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}
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return $n;
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}
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sub escape {
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my ($s) = @_;
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$s =~ s/[<>&'"]/sprintf("&#%d;", ord($1))/eg;
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return $s;
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}
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sub print_header {
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my ($fh) = @_;
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say $fh "<meta charset='utf-8'/>";
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say $fh "<style>";
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say $fh " .num {";
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say $fh " text-align: right;";
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say $fh " }";
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say $fh " .schema {";
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say $fh " background-color: #CCCCCC;";
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say $fh " }";
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say $fh " .table {";
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say $fh " background-color: #E5E5E5;";
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say $fh " }";
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say $fh "</style>";
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}
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# vim: sw=4 tw=132 expandtab
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