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9417dc5c17
Docs/manual.texi: Removed wrong web links include/mysql_com.h: Portability fix libmysqld/Makefile.am: Fix 'make dist' mysys/mf_dirname.c: Bugfix for last push scripts/explain_log.sh: Nicer output scripts/mysql_install_db.sh: Removed warnings when using 'mysql_install_db' sql/sql_parse.cc: Ensure that thd->query_length is always set sql/sql_show.cc: cleanup sql/sql_yacc.yy: Fix bug in last push vio/vio.c: Merge with violite.cc vio/viosocket.c: Merge with violite.cc
383 lines
9.9 KiB
Bash
383 lines
9.9 KiB
Bash
#!@PERL@ -w
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use strict;
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use DBI;
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use Getopt::Long;
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$Getopt::Long::ignorecase=0;
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print "explain_log provided by http://www.mobile.de\n";
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print "=========== ================================\n";
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my $Param={};
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$Param->{host}='';
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$Param->{user}='';
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$Param->{password}='';
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$Param->{PrintError}=0;
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if (!GetOptions ('date|d:i' => \$Param->{ViewDate},
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'host|h:s' => \$Param->{host},
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'user|u:s' => \$Param->{user},
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'password|p:s' => \$Param->{password},
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'printerror|e:s' => \$Param->{PrintError},
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)) {
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ShowOptions();
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}
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else {
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$Param->{UpdateCount} = 0;
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$Param->{SelectCount} = 0;
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$Param->{IdxUseCount} = 0;
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$Param->{LineCount} = 0;
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$Param->{Init} = 0;
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$Param->{Field} = 0;
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$Param->{Refresh} = 0;
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$Param->{QueryCount} = 0;
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$Param->{Statistics} =0;
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$Param->{Query} = undef;
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$Param->{ALL} = undef ;
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$Param->{Comment} = undef ;
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@{$Param->{Rows}} = (qw|possible_keys key type|);
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if ($Param->{ViewDate}) {
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$Param->{View} = 0;
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}
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else {
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$Param->{View} = 1;
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}
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#print "Date=$Param->{ViewDate}, host=$Param->{host}, user=$Param->{user}, password=$Param->{password}\n";
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$Param->{dbh}=DBI->connect("DBI:mysql:host=$Param->{host}",$Param->{user},$Param->{password},{PrintError=>0});
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if (DBI::err()) {
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print "Error: " . DBI::errstr() . "\n";
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}
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else {
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$Param->{Start} = time;
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while(<STDIN>) {
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$Param->{LineCount} ++ ;
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if ($Param->{ViewDate} ) {
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if (m/^(\d{6})\s+\d{1,2}:\d\d:\d\d\s.*$/) { # get date
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#print "# $1 #\n";
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if ($1 == $Param->{ViewDate}) {
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$Param->{View} = 1;
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}
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else {
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$Param->{View} = 0;
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}
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}
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}
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if ($Param->{View} ) {
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#print "->>>$_";
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if (m/^(\d{6}\s+\d{1,2}:\d\d:\d\d\s+|\s+)(\d+)\s+Connect.+\s+on\s+(.*)$/i) { # get connection ID($2) and database($3)
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#print "C-$1--$2--$3------\n";
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RunQuery($Param);
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if (defined $3) {
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$Param->{CID}->{$2} = $3 ;
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#print "DB:$Param->{CID}->{$2} .. $2 .. $3 \n";
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}
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}
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elsif (m/^(\d{6}\s+\d{1,2}:\d\d:\d\d\s+|\s+)(\d+)\s+Connect.+$/i) { # get connection ID($2) and database($3)
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#print "\n <<<<<<<<<<<<<<<<<<----------------------------<<<<<<<<<<<<<<<< \n";
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#print "Connect \n";
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RunQuery($Param);
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}
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elsif (m/^(\d{6}\s+\d{1,2}:\d\d:\d\d\s+|\s+)(\d+)\s+Change user .*\s+on\s+(.*)$/i) { # get connection ID($2) and database($3)
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#print "C-$1--$2--$3------\n";
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RunQuery($Param);
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if (defined $3) {
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$Param->{CID}->{$2} = $3 ;
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#print "DB:$Param->{CID}->{$2} .. $2 .. $3 \n";
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}
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}
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elsif (m/^(\d{6}\s+\d{1,2}:\d\d:\d\d\s+|\s+)(\d+)\s+Quit\s+$/i) { # remove connection ID($2) and querystring
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#print "Q-$1--$2--------\n";
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RunQuery($Param);
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delete $Param->{CID}->{$2} ;
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}
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elsif (m/^(\d{6}\s+\d{1,2}:\d\d:\d\d\s+|\s+)(\d+)\s+Query\s+(select.+)$/i) { # get connection ID($2) and querystring
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#print "S1-$1--$2--$3------\n";
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RunQuery($Param);
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unless ($Param->{CID}->{$2}) {
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#print "Error: No Database for Handle: $2 found\n";
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}
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else {
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$Param->{DB}=$Param->{CID}->{$2};
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my $s = "$3";
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$s =~ s/from\s/from $Param->{DB}./i;
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$Param->{Query}="EXPLAIN $s";
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#$s =~ m/from\s+(\w+[.]\w+)/i;
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#$Param->{tab} =$1;
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#print "-- $Param->{tab} -- $s --\n";
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}
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}
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elsif (m/^(\d{6}\s+\d{1,2}:\d\d:\d\d\s+|\s+)(\d+)\s+Query\s+(update.+)$/i) { # get connection ID($2) and querystring
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#print "S2--$1--$2--$3------\n";
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RunQuery($Param);
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unless ($Param->{CID}->{$2}) {
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#print "Error: No Database for Handle: $2 found\n";
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}
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else {
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$Param->{DB}=$Param->{CID}->{$2};
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my $ud = $3;
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$ud =~ m/^update\s+(\w+).+(where.+)$/i;
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$Param->{Query} ="EXPLAIN SELECT * FROM $1 $2";
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$Param->{Query} =~ s/from\s/from $Param->{DB}./i;
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#$Param->{Query} =~ m/from\s+(\w+[.]\w+)/i;
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#$Param->{tab} =$1;
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}
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}
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elsif (m/^(\d{6}\s+\d{1,2}:\d\d:\d\d\s+|\s+)(\d+)\s+Statistics\s+(.*)$/i) { # get connection ID($2) and info?
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$Param->{Statistics} ++;
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#print "Statistics--$1--$2--$3------\n";
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RunQuery($Param);
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}
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elsif (m/^(\d{6}\s+\d{1,2}:\d\d:\d\d\s+|\s+)(\d+)\s+Query\s+(.+)$/i) { # get connection ID($2)
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$Param->{QueryCount} ++;
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#print "Query-NULL $3\n";
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RunQuery($Param);
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}
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elsif (m/^(\d{6}\s+\d{1,2}:\d\d:\d\d\s+|\s+)(\d+)\s+Refresh\s+(.+)$/i) { # get connection ID($2)
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$Param->{Refresh} ++;
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#print "Refresh\n";
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RunQuery($Param);
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}
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elsif (m/^(\d{6}\s+\d{1,2}:\d\d:\d\d\s+|\s+)(\d+)\s+Init\s+(.+)$/i) { # get connection ID($2)
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$Param->{Init} ++;
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#print "Init $3\n";
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RunQuery($Param);
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}
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elsif (m/^(\d{6}\s+\d{1,2}:\d\d:\d\d\s+|\s+)(\d+)\s+Field\s+(.+)$/i) { # get connection ID($2)
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$Param->{Field} ++;
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#print "Field $3\n";
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RunQuery($Param);
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}
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elsif (m/^\s+(.+)$/ ) { # command could be some lines ...
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#print "multi-lined ($1)\n";
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my ($A)=$1;
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chomp $A;
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$Param->{Query} .= " $1";
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#print "multi-lined ($1)<<$Param->{Query}>>\n";
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}
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}
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}
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$Param->{dbh}->disconnect();
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if (1 == 0) {
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print "\nunclosed handles----------------------------------------\n";
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my $count=0;
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foreach (sort keys %{$Param->{CID}}) {
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print "$count | $_ : $Param->{CID}->{$_} \n";
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$count ++;
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}
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}
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print "\nIndex usage ------------------------------------\n";
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foreach my $t (sort keys %{$Param->{Data}}) {
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print "\nTable\t$t: ---\n";
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foreach my $k (sort keys %{$Param->{Data}->{$t}}) {
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print " count\t$k:\n";
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my %h = %{$Param->{Data}->{$t}->{$k}};
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foreach (sort {$h{$a} <=> $h{$b}} keys %h) {
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print " $Param->{Data}->{$t}->{$k}->{$_}\t$_\n";
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}
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}
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}
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$Param->{AllCount}=0;
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print "\nQueries causing table scans -------------------\n\n";
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foreach (@{$Param->{ALL}}) {
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$Param->{AllCount} ++;
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print "$_\n";
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}
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print "Sum: $Param->{AllCount} table scans\n";
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print "\nSummary ---------------------------------------\n\n";
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print "Select: \t$Param->{SelectCount} queries\n";
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print "Update: \t$Param->{UpdateCount} queries\n";
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print "\n";
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print "Init: \t$Param->{Init} times\n";
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print "Field: \t$Param->{Field} times\n";
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print "Refresh: \t$Param->{Refresh} times\n";
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print "Query: \t$Param->{QueryCount} times\n";
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print "Statistics:\t$Param->{Statistics} times\n";
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print "\n";
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print "Logfile: \t$Param->{LineCount} lines\n";
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print "Started: \t".localtime($Param->{Start})."\n";
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print "Finished: \t".localtime(time)."\n";
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}
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}
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###########################################################################
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#
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#
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#
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sub RunQuery {
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my $Param = shift ;
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if (defined $Param->{Query}) {
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if (defined $Param->{DB} ) {
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$Param->{Query} =~ m/from\s+(\w+[.]\w+|\w+)/i;
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$Param->{tab} =$1;
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#print "||$Param->{tab} -- $Param->{Query}\n";
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my $sth=$Param->{dbh}->prepare("USE $Param->{DB}");
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if (DBI::err()) {
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if ($Param->{PrintError}) {print "Error: ".DBI::errstr()."\n";}
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}
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else {
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$sth->execute();
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if (DBI::err()) {
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if ($Param->{PrintError}) {print "Error: ".DBI::errstr()."\n";}
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}
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else {
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$sth->finish();
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$sth=$Param->{dbh}->prepare($Param->{Query});
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if (DBI::err()) {
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if ($Param->{PrintError}) {print "Error: ".DBI::errstr()."\n";}
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}
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else {
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#print "$Param->{Query}\n";
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$sth->execute();
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if (DBI::err()) {
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if ($Param->{PrintError}) {print "[$Param->{LineCount}]<<$Param->{Query}>>\n";}
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if ($Param->{PrintError}) {print "Error: ".DBI::errstr()."\n";}
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}
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else {
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my $row = undef;
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while ($row = $sth->fetchrow_hashref()) {
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$Param->{SelectCount} ++;
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if (defined $row->{Comment}) {
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push (@{$Param->{Comment}}, "$row->{Comment}; $_; $Param->{DB}; $Param->{Query}");
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}
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foreach (@{$Param->{Rows}}) {
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if (defined $row->{$_}) {
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#if (($_ eq 'type' ) and ($row->{$_} eq 'ALL')) {
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if ($row->{type} eq 'ALL') {
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push (@{$Param->{ALL}}, "$Param->{Query}");
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#print ">> $row->{$_} $_ $Param->{DB} $Param->{Query}\n";
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}
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$Param->{IdxUseCount} ++;
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$Param->{Data}->{$Param->{tab}}->{$_}->{$row->{$_}} ++;
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}
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}
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}
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}
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}
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}
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}
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$sth->finish();
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}
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$Param->{Query} = undef ;
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}
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}
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###########################################################################
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#
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#
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#
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sub ShowOptions {
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print <<EOF;
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Usage: $0 [OPTIONS] < LOGFILE
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--date=YYMMDD select only entrys of date
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-d=YYMMDD
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--host=HOSTNAME db-host to ask
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-h=HOSTNAME
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--user=USERNAME db-user
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-u=USERNAME
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--password=PASSWORD password of db-user
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-p=PASSWORD
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Read logfile from STDIN an try to EXPLAIN all SELECT statements. All UPDATE statements are rewritten to an EXPLAIN SELECT statement. The results of the EXPLAIN statement are collected and counted. All results with type=ALL are collected in an separete list. Results are printed to STDOUT.
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EOF
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}
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1;
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__END__
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=pod
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=head1 NAME
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explain_log.pl
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Feed a mysqld general logfile (created with mysqld --log) back into mysql
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and collect statistics about index usage with EXPLAIN.
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=head1 DISCUSSION
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To optimize your indices, you have to know which ones are actually
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used and what kind of queries are causing table scans. Especially
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if you are generating your queries dynamically and you have a huge
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amount of queries going on, this isn't easy.
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Use this tool to take a look at the effects of your real life queries.
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Then add indices to avoid table scans and remove those which aren't used.
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=head1 USAGE
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explain_log.pl [--date=YYMMDD] --host=dbhost] [--user=dbuser] [--password=dbpw] < logfile
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--date=YYMMDD select only entrys of date
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-d=YYMMDD
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--host=HOSTNAME db-host to ask
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-h=HOSTNAME
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--user=USERNAME db-user
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-u=USERNAME
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--password=PASSWORD password of db-user
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-p=PASSWORD
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=head1 EXAMPLE
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explain_log.pl --host=localhost --user=foo --password=bar < /var/lib/mysql/mobile.log
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=head1 AUTHOR
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Stefan Nitz
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Jan Willamowius <jan@mobile.de>, http://www.mobile.de
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=head1 RECRUITING
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If you are looking for a MySQL or Perl job, take a look at http://www.mobile.de
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and send me an email with your resume (you must be speaking German!).
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=head1 SEE ALSO
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mysql documentation
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=cut
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