hhf/MySQLTuner-perl
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* Adjusted infoprint to use asterisks (cosmetic)

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* Per-thread/global buffer counts are now displayed
* Key buffer increases are only recommended if the buffer is smaller than total indexes and key buffer hit rate is < 95%
* Dropped max_seeks_for_key checks
* Temporary table size increases are not recommended over 256M
* Aborted connection calculation and recommendation adjustments
This commit is contained in:
Major Hayden 2007-10-16 01:45:09 +00:00
parent b267fc7636
commit d98fa91a3d
1 changed files with 13 additions and 8 deletions
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17
mysqltuner.pl
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@ -68,7 +68,7 @@ my ($good,$bad,$info);
if ($opt{nocolor} == 0) { if ($opt{nocolor} == 0) {
$good = "[\e[00;32mOK\e[00m]"; $good = "[\e[00;32mOK\e[00m]";
$bad = "[\e[00;31m!!\e[00m]"; $bad = "[\e[00;31m!!\e[00m]";
$info = "[\e[00;34m--\e[00m]"; $info = "[\e[00;34m**\e[00m]";
} else { } else {
$good = "[OK]"; $good = "[OK]";
$bad = "[!!]"; $bad = "[!!]";
@ -391,6 +391,8 @@ sub mysql_stats {
infoprint "Reads / Writes: ".$mycalc{'pct_reads'}."% / ".$mycalc{'pct_writes'}."%\n"; infoprint "Reads / Writes: ".$mycalc{'pct_reads'}."% / ".$mycalc{'pct_writes'}."%\n";
# Memory usage # Memory usage
infoprint "Total buffers per thread: ".hr_bytes($mycalc{'per_thread_buffers'})."\n";
infoprint "Total global buffers: ".hr_bytes($mycalc{'server_buffers'})."\n";
if ($mycalc{'pct_physical_memory'} > 85) { if ($mycalc{'pct_physical_memory'} > 85) {
badprint "Maximum possible memory usage: ".hr_bytes($mycalc{'total_possible_used_memory'})." ($mycalc{'pct_physical_memory'}% of installed RAM)\n"; badprint "Maximum possible memory usage: ".hr_bytes($mycalc{'total_possible_used_memory'})." ($mycalc{'pct_physical_memory'}% of installed RAM)\n";
push(@generalrec,"Reduce your overall MySQL memory footprint for system stability"); push(@generalrec,"Reduce your overall MySQL memory footprint for system stability");
@ -425,7 +427,7 @@ sub mysql_stats {
} elsif ($mycalc{'total_myisam_indexes'} == "0") { } elsif ($mycalc{'total_myisam_indexes'} == "0") {
badprint "None of your MyISAM tables are indexed - add indexes immediately\n"; badprint "None of your MyISAM tables are indexed - add indexes immediately\n";
} else { } else {
if ($myvar{'key_buffer_size'} < $mycalc{'total_myisam_indexes'}) { if ($myvar{'key_buffer_size'} < $mycalc{'total_myisam_indexes'} && $mycalc{'pct_keys_from_mem'} < 95) {
badprint "Key buffer size / total MyISAM indexes: ".hr_bytes($myvar{'key_buffer_size'})."/".hr_bytes($mycalc{'total_myisam_indexes'})."\n"; badprint "Key buffer size / total MyISAM indexes: ".hr_bytes($myvar{'key_buffer_size'})."/".hr_bytes($mycalc{'total_myisam_indexes'})."\n";
push(@incvars,"key_buffer_size (> ".hr_bytes($mycalc{'total_myisam_indexes'}).")"); push(@incvars,"key_buffer_size (> ".hr_bytes($mycalc{'total_myisam_indexes'}).")");
} else { } else {
@ -442,7 +444,6 @@ sub mysql_stats {
# No queries have run that would use keys # No queries have run that would use keys
} }
} }
if ($mysqlvermajor > 3 && $myvar{'max_seeks_for_key'} > 1000) { push(@decvars,"max_seeks_for_key (<= 1000)"); }
# Query cache # Query cache
if ($mysqlvermajor < 4) { if ($mysqlvermajor < 4) {
@ -493,12 +494,16 @@ sub mysql_stats {
# Temporary tables # Temporary tables
if ($mystat{'Created_tmp_tables'} > 0) { if ($mystat{'Created_tmp_tables'} > 0) {
if ($mycalc{'pct_temp_disk'} > 25) { if ($mycalc{'pct_temp_disk'} > 25 && $mycalc{'max_tmp_table_size'} < 256) {
badprint "Temporary tables created on disk: $mycalc{'pct_temp_disk'}%\n"; badprint "Temporary tables created on disk: $mycalc{'pct_temp_disk'}%\n";
push(@incvars,"tmp_table_size (> ".hr_bytes_rnd($myvar{'tmp_table_size'}).")"); push(@incvars,"tmp_table_size (> ".hr_bytes_rnd($myvar{'tmp_table_size'}).")");
push(@incvars,"max_heap_table_size (> ".hr_bytes_rnd($myvar{'max_heap_table_size'}).")"); push(@incvars,"max_heap_table_size (> ".hr_bytes_rnd($myvar{'max_heap_table_size'}).")");
push(@generalrec,"Be sure that tmp_table_size/max_heap_table_size are equal"); push(@generalrec,"Be sure that tmp_table_size/max_heap_table_size are equal");
push(@generalrec,"Reduce your SELECT DISTINCT queries without LIMIT clauses"); push(@generalrec,"Reduce your SELECT DISTINCT queries without LIMIT clauses");
} elsif ($mycalc{'pct_temp_disk'} > 25 && $mycalc{'max_tmp_table_size'} >= 256) {
badprint "Temporary tables created on disk: $mycalc{'pct_temp_disk'}%\n";
push(@generalrec,"Temporary table size is already large - reduce result set size");
push(@generalrec,"Reduce your SELECT DISTINCT queries without LIMIT clauses");
} else { } else {
goodprint "Temporary tables created on disk: $mycalc{'pct_temp_disk'}%\n"; goodprint "Temporary tables created on disk: $mycalc{'pct_temp_disk'}%\n";
} }
@ -553,8 +558,8 @@ sub mysql_stats {
} elsif ($myvar{'concurrent_insert'} eq 0) { } elsif ($myvar{'concurrent_insert'} eq 0) {
push(@generalrec,"Enable concurrent_insert by setting it to 1"); push(@generalrec,"Enable concurrent_insert by setting it to 1");
} }
if ($mycalc{'pct_aborted_connections'} > 0) { if ($mycalc{'pct_aborted_connections'} > 5) {
badprint "Connections aborted: ".$mycalc{'pct_aborted_connections'}."\n"; badprint "Connections aborted: ".$mycalc{'pct_aborted_connections'}."%\n";
push(@generalrec,"Your applications are not closing MySQL connections properly"); push(@generalrec,"Your applications are not closing MySQL connections properly");
} }
} }