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Diffstat (limited to 'hugo/server_status_variables.php')
| -rw-r--r-- | hugo/server_status_variables.php | 767 |
1 files changed, 767 insertions, 0 deletions
diff --git a/hugo/server_status_variables.php b/hugo/server_status_variables.php new file mode 100644 index 0000000..93dc968 --- /dev/null +++ b/hugo/server_status_variables.php @@ -0,0 +1,767 @@ +<?php +/* vim: set expandtab sw=4 ts=4 sts=4: */ +/** + * Displays a list of server status variables + * + * @package PhpMyAdmin + */ + +require_once 'libraries/common.inc.php'; +require_once 'libraries/server_common.inc.php'; +require_once 'libraries/ServerStatusData.class.php'; +if (PMA_DRIZZLE) { + $server_master_status = false; + $server_slave_status = false; +} else { + include_once 'libraries/replication.inc.php'; + include_once 'libraries/replication_gui.lib.php'; +} + +/** + * flush status variables if requested + */ +if (isset($_REQUEST['flush'])) { + $_flush_commands = array( + 'STATUS', + 'TABLES', + 'QUERY CACHE', + ); + + if (in_array($_REQUEST['flush'], $_flush_commands)) { + PMA_DBI_query('FLUSH ' . $_REQUEST['flush'] . ';'); + } + unset($_flush_commands); +} + +$ServerStatusData = new PMA_ServerStatusData(); + +$response = PMA_Response::getInstance(); +$header = $response->getHeader(); +$scripts = $header->getScripts(); +$scripts->addFile('server_status_variables.js'); +$scripts->addFile('jquery/jquery.tablesorter.js'); +$scripts->addFile('server_status_sorter.js'); + +$response->addHTML('<div>'); +$response->addHTML($ServerStatusData->getMenuHtml()); +$response->addHTML(getFilterHtml($ServerStatusData)); +$response->addHTML(getLinkSuggestionsHtml($ServerStatusData)); +$response->addHTML(getVariablesTableHtml($ServerStatusData)); +$response->addHTML('</div>'); + +exit; + +/** + * Returns the html for the list filter + * + * @param Object $ServerStatusData An instance of the PMA_ServerStatusData class + * + * @return string + */ +function getFilterHtml($ServerStatusData) +{ + $filterAlert = ''; + if (! empty($_REQUEST['filterAlert'])) { + $filterAlert = ' checked="checked"'; + } + $filterText = ''; + if (! empty($_REQUEST['filterText'])) { + $filterText = htmlspecialchars($_REQUEST['filterText']); + } + $dontFormat = ''; + if (! empty($_REQUEST['dontFormat'])) { + $dontFormat = ' checked="checked"'; + } + + $retval = ''; + $retval .= '<fieldset id="tableFilter">'; + $retval .= '<legend>' . __('Filters') . '</legend>'; + $retval .= '<form action="server_status_variables.php?' . PMA_generate_common_url() . '">'; + $retval .= '<input type="submit" value="' . __('Refresh') . '" />'; + $retval .= '<div class="formelement">'; + $retval .= '<label for="filterText">' . __('Containing the word:') . '</label>'; + $retval .= '<input name="filterText" type="text" id="filterText" ' + . 'style="vertical-align: baseline;" value="' . $filterText . '" />'; + $retval .= '</div>'; + $retval .= '<div class="formelement">'; + $retval .= '<input' . $filterAlert . ' type="checkbox" name="filterAlert" id="filterAlert" />'; + $retval .= '<label for="filterAlert">'; + $retval .= __('Show only alert values'); + $retval .= '</label>'; + $retval .= '</div>'; + $retval .= '<div class="formelement">'; + $retval .= '<select id="filterCategory" name="filterCategory">'; + $retval .= '<option value="">' . __('Filter by category…') . '</option>'; + + foreach ($ServerStatusData->sections as $section_id => $section_name) { + if (isset($ServerStatusData->categoryUsed[$section_id])) { + if (! empty($_REQUEST['filterCategory']) + && $_REQUEST['filterCategory'] == $section_id + ) { + $selected = ' selected="selected"'; + } else { + $selected = ''; + } + $retval .= '<option' . $selected . ' value="' . $section_id. '">'; + $retval .= htmlspecialchars($section_name) . '</option>'; + } + } + $retval .= '</select>'; + $retval .= '</div>'; + $retval .= '<div class="formelement">'; + $retval .= '<input' . $dontFormat . ' type="checkbox" name="dontFormat" id="dontFormat" />'; + $retval .= '<label for="dontFormat">'; + $retval .= __('Show unformatted values'); + $retval .= '</label>'; + $retval .= '</div>'; + $retval .= '</form>'; + $retval .= '</fieldset>'; + + return $retval; +} + +/** + * Prints the suggestion links + * + * @param Object $ServerStatusData An instance of the PMA_ServerStatusData class + * + * @return string + */ +function getLinkSuggestionsHtml($ServerStatusData) +{ + $retval = '<div id="linkSuggestions" class="defaultLinks" style="display:none">'; + $retval .= '<p class="notice">' . __('Related links:'); + foreach ($ServerStatusData->links as $section_name => $section_links) { + $retval .= '<span class="status_' . $section_name . '"> '; + $i=0; + foreach ($section_links as $link_name => $link_url) { + if ($i > 0) { + $retval .= ', '; + } + if ('doc' == $link_name) { + $retval .= PMA_Util::showMySQLDocu($link_url, $link_url); + } else { + $retval .= '<a href="' . $link_url . '">' . $link_name . '</a>'; + } + $i++; + } + $retval .= '</span>'; + } + unset($link_url, $link_name, $i); + $retval .= '</p>'; + $retval .= '</div>'; + + return $retval; +} + +/** + * Returns a table with variables information + * + * @param Object $ServerStatusData An instance of the PMA_ServerStatusData class + * + * @return string + */ +function getVariablesTableHtml($ServerStatusData) +{ + $retval = ''; + $strShowStatus = getStatusVariablesDescriptions(); + /** + * define some alerts + */ + // name => max value before alert + $alerts = array( + // lower is better + // variable => max value + 'Aborted_clients' => 0, + 'Aborted_connects' => 0, + + 'Binlog_cache_disk_use' => 0, + + 'Created_tmp_disk_tables' => 0, + + 'Handler_read_rnd' => 0, + 'Handler_read_rnd_next' => 0, + + 'Innodb_buffer_pool_pages_dirty' => 0, + 'Innodb_buffer_pool_reads' => 0, + 'Innodb_buffer_pool_wait_free' => 0, + 'Innodb_log_waits' => 0, + 'Innodb_row_lock_time_avg' => 10, // ms + 'Innodb_row_lock_time_max' => 50, // ms + 'Innodb_row_lock_waits' => 0, + + 'Slow_queries' => 0, + 'Delayed_errors' => 0, + 'Select_full_join' => 0, + 'Select_range_check' => 0, + 'Sort_merge_passes' => 0, + 'Opened_tables' => 0, + 'Table_locks_waited' => 0, + 'Qcache_lowmem_prunes' => 0, + + 'Qcache_free_blocks' => isset($ServerStatusData->server_status['Qcache_total_blocks']) + ? $ServerStatusData->server_status['Qcache_total_blocks'] / 5 : 0, + 'Slow_launch_threads' => 0, + + // depends on Key_read_requests + // normaly lower then 1:0.01 + 'Key_reads' => isset($ServerStatusData->status['Key_read_requests']) + ? (0.01 * $ServerStatusData->status['Key_read_requests']) : 0, + // depends on Key_write_requests + // normaly nearly 1:1 + 'Key_writes' => isset($ServerStatusData->status['Key_write_requests']) + ? (0.9 * $ServerStatusData->status['Key_write_requests']) : 0, + + 'Key_buffer_fraction' => 0.5, + + // alert if more than 95% of thread cache is in use + 'Threads_cached' => isset($ServerStatusData->variables['thread_cache_size']) + ? 0.95 * $ServerStatusData->variables['thread_cache_size'] : 0 + + // higher is better + // variable => min value + //'Handler read key' => '> ', + ); + + $retval .= '<table class="data sortable noclick" id="serverstatusvariables">'; + $retval .= '<col class="namecol" />'; + $retval .= '<col class="valuecol" />'; + $retval .= '<col class="descrcol" />'; + $retval .= '<thead>'; + $retval .= '<tr>'; + $retval .= '<th>' . __('Variable') . '</th>'; + $retval .= '<th>' . __('Value') . '</th>'; + $retval .= '<th>' . __('Description') . '</th>'; + $retval .= '</tr>'; + $retval .= '</thead>'; + $retval .= '<tbody>'; + + $odd_row = false; + foreach ($ServerStatusData->status as $name => $value) { + $odd_row = !$odd_row; + $retval .= '<tr class="' . ($odd_row ? 'odd' : 'even') + . (isset($ServerStatusData->allocationMap[$name])?' s_' . $ServerStatusData->allocationMap[$name] : '') + . '">'; + + $retval .= '<th class="name">'; + $retval .= htmlspecialchars(str_replace('_', ' ', $name)); + /* Fields containing % are calculated, they can not be described in MySQL documentation */ + if (strpos($name, '%') === false) { + $retval .= PMA_Util::showMySQLDocu( + 'server-status-variables', + 'server-status-variables', + false, + 'statvar_' . $name + ); + } + $retval .= '</th>'; + + $retval .= '<td class="value"><span class="formatted">'; + if (isset($alerts[$name])) { + if ($value > $alerts[$name]) { + $retval .= '<span class="attention">'; + } else { + $retval .= '<span class="allfine">'; + } + } + if ('%' === substr($name, -1, 1)) { + $retval .= htmlspecialchars(PMA_Util::formatNumber($value, 0, 2)) . ' %'; + } elseif (strpos($name, 'Uptime') !== false) { + $retval .= htmlspecialchars( + PMA_Util::timespanFormat($value) + ); + } elseif (is_numeric($value) && $value == (int) $value && $value > 1000) { + $retval .= '<abbr title="' + // makes available the raw value as a title + . htmlspecialchars(PMA_Util::formatNumber($value, 0)) + . '">' + . htmlspecialchars(PMA_Util::formatNumber($value, 3, 1)); + } elseif (is_numeric($value) && $value == (int) $value) { + $retval .= htmlspecialchars(PMA_Util::formatNumber($value, 3, 0)); + } elseif (is_numeric($value)) { + $retval .= htmlspecialchars(PMA_Util::formatNumber($value, 3, 1)); + } else { + $retval .= htmlspecialchars($value); + } + if (isset($alerts[$name])) { + $retval .= '</span>'; + } + $retval .= '</span>'; + $retval .= '<span style="display:none;" class="original">'; + $retval .= $value; + $retval .= '</span>'; + $retval .= '</td>'; + $retval .= '<td class="descr">'; + + if (isset($strShowStatus[$name])) { + $retval .= $strShowStatus[$name]; + } + + if (isset($ServerStatusData->links[$name])) { + foreach ($ServerStatusData->links[$name] as $link_name => $link_url) { + if ('doc' == $link_name) { + $retval .= PMA_Util::showMySQLDocu($link_url, $link_url); + } else { + $retval .= ' <a href="' . $link_url . '">' . $link_name . '</a>'; + } + } + unset($link_url, $link_name); + } + $retval .= '</td>'; + $retval .= '</tr>'; + } + $retval .= '</tbody>'; + $retval .= '</table>'; + + return $retval; +} + +/** + * Returns a list of variable descriptions + * + * @return array + */ +function getStatusVariablesDescriptions() +{ + /** + * Messages are built using the message name + */ + return array( + 'Aborted_clients' => __( + 'The number of connections that were aborted because the client died' + . ' without closing the connection properly.' + ), + 'Aborted_connects' => __( + 'The number of failed attempts to connect to the MySQL server.' + ), + 'Binlog_cache_disk_use' => __( + 'The number of transactions that used the temporary binary log cache' + . ' but that exceeded the value of binlog_cache_size and used a' + . ' temporary file to store statements from the transaction.' + ), + 'Binlog_cache_use' => __( + 'The number of transactions that used the temporary binary log cache.' + ), + 'Connections' => __( + 'The number of connection attempts (successful or not)' + . ' to the MySQL server.' + ), + 'Created_tmp_disk_tables' => __( + 'The number of temporary tables on disk created automatically by' + . ' the server while executing statements. If' + . ' Created_tmp_disk_tables is big, you may want to increase the' + . ' tmp_table_size value to cause temporary tables to be' + . ' memory-based instead of disk-based.' + ), + 'Created_tmp_files' => __( + 'How many temporary files mysqld has created.' + ), + 'Created_tmp_tables' => __( + 'The number of in-memory temporary tables created automatically' + . ' by the server while executing statements.' + ), + 'Delayed_errors' => __( + 'The number of rows written with INSERT DELAYED for which some' + . ' error occurred (probably duplicate key).' + ), + 'Delayed_insert_threads' => __( + 'The number of INSERT DELAYED handler threads in use. Every' + . ' different table on which one uses INSERT DELAYED gets' + . ' its own thread.' + ), + 'Delayed_writes' => __( + 'The number of INSERT DELAYED rows written.' + ), + 'Flush_commands' => __( + 'The number of executed FLUSH statements.' + ), + 'Handler_commit' => __( + 'The number of internal COMMIT statements.' + ), + 'Handler_delete' => __( + 'The number of times a row was deleted from a table.' + ), + 'Handler_discover' => __( + 'The MySQL server can ask the NDB Cluster storage engine if it' + . ' knows about a table with a given name. This is called discovery.' + . ' Handler_discover indicates the number of time tables have been' + . ' discovered.' + ), + 'Handler_read_first' => __( + 'The number of times the first entry was read from an index. If this' + . ' is high, it suggests that the server is doing a lot of full' + . ' index scans; for example, SELECT col1 FROM foo, assuming that' + . ' col1 is indexed.' + ), + 'Handler_read_key' => __( + 'The number of requests to read a row based on a key. If this is' + . ' high, it is a good indication that your queries and tables' + . ' are properly indexed.' + ), + 'Handler_read_next' => __( + 'The number of requests to read the next row in key order. This is' + . ' incremented if you are querying an index column with a range' + . ' constraint or if you are doing an index scan.' + ), + 'Handler_read_prev' => __( + 'The number of requests to read the previous row in key order.' + . ' This read method is mainly used to optimize ORDER BY … DESC.' + ), + 'Handler_read_rnd' => __( + 'The number of requests to read a row based on a fixed position.' + . ' This is high if you are doing a lot of queries that require' + . ' sorting of the result. You probably have a lot of queries that' + . ' require MySQL to scan whole tables or you have joins that' + . ' don\'t use keys properly.' + ), + 'Handler_read_rnd_next' => __( + 'The number of requests to read the next row in the data file.' + . ' This is high if you are doing a lot of table scans. Generally' + . ' this suggests that your tables are not properly indexed or that' + . ' your queries are not written to take advantage of the indexes' + . ' you have.' + ), + 'Handler_rollback' => __( + 'The number of internal ROLLBACK statements.' + ), + 'Handler_update' => __( + 'The number of requests to update a row in a table.' + ), + 'Handler_write' => __( + 'The number of requests to insert a row in a table.' + ), + 'Innodb_buffer_pool_pages_data' => __( + 'The number of pages containing data (dirty or clean).' + ), + 'Innodb_buffer_pool_pages_dirty' => __( + 'The number of pages currently dirty.' + ), + 'Innodb_buffer_pool_pages_flushed' => __( + 'The number of buffer pool pages that have been requested' + . ' to be flushed.' + ), + 'Innodb_buffer_pool_pages_free' => __( + 'The number of free pages.' + ), + 'Innodb_buffer_pool_pages_latched' => __( + 'The number of latched pages in InnoDB buffer pool. These are pages' + . ' currently being read or written or that can\'t be flushed or' + . ' removed for some other reason.' + ), + 'Innodb_buffer_pool_pages_misc' => __( + 'The number of pages busy because they have been allocated for' + . ' administrative overhead such as row locks or the adaptive' + . ' hash index. This value can also be calculated as' + . ' Innodb_buffer_pool_pages_total - Innodb_buffer_pool_pages_free' + . ' - Innodb_buffer_pool_pages_data.' + ), + 'Innodb_buffer_pool_pages_total' => __( + 'Total size of buffer pool, in pages.' + ), + 'Innodb_buffer_pool_read_ahead_rnd' => __( + 'The number of "random" read-aheads InnoDB initiated. This happens' + . ' when a query is to scan a large portion of a table but in' + . ' random order.' + ), + 'Innodb_buffer_pool_read_ahead_seq' => __( + 'The number of sequential read-aheads InnoDB initiated. This' + . ' happens when InnoDB does a sequential full table scan.' + ), + 'Innodb_buffer_pool_read_requests' => __( + 'The number of logical read requests InnoDB has done.' + ), + 'Innodb_buffer_pool_reads' => __( + 'The number of logical reads that InnoDB could not satisfy' + . ' from buffer pool and had to do a single-page read.' + ), + 'Innodb_buffer_pool_wait_free' => __( + 'Normally, writes to the InnoDB buffer pool happen in the' + . ' background. However, if it\'s necessary to read or create a page' + . ' and no clean pages are available, it\'s necessary to wait for' + . ' pages to be flushed first. This counter counts instances of' + . ' these waits. If the buffer pool size was set properly, this' + . ' value should be small.' + ), + 'Innodb_buffer_pool_write_requests' => __( + 'The number writes done to the InnoDB buffer pool.' + ), + 'Innodb_data_fsyncs' => __( + 'The number of fsync() operations so far.' + ), + 'Innodb_data_pending_fsyncs' => __( + 'The current number of pending fsync() operations.' + ), + 'Innodb_data_pending_reads' => __( + 'The current number of pending reads.' + ), + 'Innodb_data_pending_writes' => __( + 'The current number of pending writes.' + ), + 'Innodb_data_read' => __( + 'The amount of data read so far, in bytes.' + ), + 'Innodb_data_reads' => __( + 'The total number of data reads.' + ), + 'Innodb_data_writes' => __( + 'The total number of data writes.' + ), + 'Innodb_data_written' => __( + 'The amount of data written so far, in bytes.' + ), + 'Innodb_dblwr_pages_written' => __( + 'The number of pages that have been written for' + . ' doublewrite operations.' + ), + 'Innodb_dblwr_writes' => __( + 'The number of doublewrite operations that have been performed.' + ), + 'Innodb_log_waits' => __( + 'The number of waits we had because log buffer was too small and' + . ' we had to wait for it to be flushed before continuing.' + ), + 'Innodb_log_write_requests' => __( + 'The number of log write requests.' + ), + 'Innodb_log_writes' => __( + 'The number of physical writes to the log file.' + ), + 'Innodb_os_log_fsyncs' => __( + 'The number of fsync() writes done to the log file.' + ), + 'Innodb_os_log_pending_fsyncs' => __( + 'The number of pending log file fsyncs.' + ), + 'Innodb_os_log_pending_writes' => __( + 'Pending log file writes.' + ), + 'Innodb_os_log_written' => __( + 'The number of bytes written to the log file.' + ), + 'Innodb_pages_created' => __( + 'The number of pages created.' + ), + 'Innodb_page_size' => __( + 'The compiled-in InnoDB page size (default 16KB). Many values are' + . ' counted in pages; the page size allows them to be easily' + . ' converted to bytes.' + ), + 'Innodb_pages_read' => __( + 'The number of pages read.' + ), + 'Innodb_pages_written' => __( + 'The number of pages written.' + ), + 'Innodb_row_lock_current_waits' => __( + 'The number of row locks currently being waited for.' + ), + 'Innodb_row_lock_time_avg' => __( + 'The average time to acquire a row lock, in milliseconds.' + ), + 'Innodb_row_lock_time' => __( + 'The total time spent in acquiring row locks, in milliseconds.' + ), + 'Innodb_row_lock_time_max' => __( + 'The maximum time to acquire a row lock, in milliseconds.' + ), + 'Innodb_row_lock_waits' => __( + 'The number of times a row lock had to be waited for.' + ), + 'Innodb_rows_deleted' => __( + 'The number of rows deleted from InnoDB tables.' + ), + 'Innodb_rows_inserted' => __( + 'The number of rows inserted in InnoDB tables.' + ), + 'Innodb_rows_read' => __( + 'The number of rows read from InnoDB tables.' + ), + 'Innodb_rows_updated' => __( + 'The number of rows updated in InnoDB tables.' + ), + 'Key_blocks_not_flushed' => __( + 'The number of key blocks in the key cache that have changed but' + . ' haven\'t yet been flushed to disk. It used to be known as' + . ' Not_flushed_key_blocks.' + ), + 'Key_blocks_unused' => __( + 'The number of unused blocks in the key cache. You can use this' + . ' value to determine how much of the key cache is in use.' + ), + 'Key_blocks_used' => __( + 'The number of used blocks in the key cache. This value is a' + . ' high-water mark that indicates the maximum number of blocks' + . ' that have ever been in use at one time.' + ), + 'Key_buffer_fraction_%' => __( + 'Percentage of used key cache (calculated value)' + ), + 'Key_read_requests' => __( + 'The number of requests to read a key block from the cache.' + ), + 'Key_reads' => __( + 'The number of physical reads of a key block from disk. If Key_reads' + . ' is big, then your key_buffer_size value is probably too small.' + . ' The cache miss rate can be calculated as' + . ' Key_reads/Key_read_requests.' + ), + 'Key_read_ratio_%' => __( + 'Key cache miss calculated as rate of physical reads compared' + . ' to read requests (calculated value)' + ), + 'Key_write_requests' => __( + 'The number of requests to write a key block to the cache.' + ), + 'Key_writes' => __( + 'The number of physical writes of a key block to disk.' + ), + 'Key_write_ratio_%' => __( + 'Percentage of physical writes compared' + . ' to write requests (calculated value)' + ), + 'Last_query_cost' => __( + 'The total cost of the last compiled query as computed by the query' + . ' optimizer. Useful for comparing the cost of different query' + . ' plans for the same query. The default value of 0 means that' + . ' no query has been compiled yet.' + ), + 'Max_used_connections' => __( + 'The maximum number of connections that have been in use' + . ' simultaneously since the server started.' + ), + 'Not_flushed_delayed_rows' => __( + 'The number of rows waiting to be written in INSERT DELAYED queues.' + ), + 'Opened_tables' => __( + 'The number of tables that have been opened. If opened tables is' + . ' big, your table cache value is probably too small.' + ), + 'Open_files' => __( + 'The number of files that are open.' + ), + 'Open_streams' => __( + 'The number of streams that are open (used mainly for logging).' + ), + 'Open_tables' => __( + 'The number of tables that are open.' + ), + 'Qcache_free_blocks' => __( + 'The number of free memory blocks in query cache. High numbers can' + . ' indicate fragmentation issues, which may be solved by issuing' + . ' a FLUSH QUERY CACHE statement.' + ), + 'Qcache_free_memory' => __( + 'The amount of free memory for query cache.' + ), + 'Qcache_hits' => __( + 'The number of cache hits.' + ), + 'Qcache_inserts' => __( + 'The number of queries added to the cache.' + ), + 'Qcache_lowmem_prunes' => __( + 'The number of queries that have been removed from the cache to' + . ' free up memory for caching new queries. This information can' + . ' help you tune the query cache size. The query cache uses a' + . ' least recently used (LRU) strategy to decide which queries' + . ' to remove from the cache.' + ), + 'Qcache_not_cached' => __( + 'The number of non-cached queries (not cachable, or not cached' + . ' due to the query_cache_type setting).' + ), + 'Qcache_queries_in_cache' => __( + 'The number of queries registered in the cache.' + ), + 'Qcache_total_blocks' => __( + 'The total number of blocks in the query cache.' + ), + 'Rpl_status' => __( + 'The status of failsafe replication (not yet implemented).' + ), + 'Select_full_join' => __( + 'The number of joins that do not use indexes. If this value is' + . ' not 0, you should carefully check the indexes of your tables.' + ), + 'Select_full_range_join' => __( + 'The number of joins that used a range search on a reference table.' + ), + 'Select_range_check' => __( + 'The number of joins without keys that check for key usage after' + . ' each row. (If this is not 0, you should carefully check the' + . ' indexes of your tables.)' + ), + 'Select_range' => __( + 'The number of joins that used ranges on the first table. (It\'s' + . ' normally not critical even if this is big.)' + ), + 'Select_scan' => __( + 'The number of joins that did a full scan of the first table.' + ), + 'Slave_open_temp_tables' => __( + 'The number of temporary tables currently' + . ' open by the slave SQL thread.' + ), + 'Slave_retried_transactions' => __( + 'Total (since startup) number of times the replication slave SQL' + . ' thread has retried transactions.' + ), + 'Slave_running' => __( + 'This is ON if this server is a slave that is connected to a master.' + ), + 'Slow_launch_threads' => __( + 'The number of threads that have taken more than slow_launch_time' + . ' seconds to create.' + ), + 'Slow_queries' => __( + 'The number of queries that have taken more than long_query_time' + . ' seconds.' + ), + 'Sort_merge_passes' => __( + 'The number of merge passes the sort algorithm has had to do.' + . ' If this value is large, you should consider increasing the' + . ' value of the sort_buffer_size system variable.' + ), + 'Sort_range' => __( + 'The number of sorts that were done with ranges.' + ), + 'Sort_rows' => __( + 'The number of sorted rows.' + ), + 'Sort_scan' => __( + 'The number of sorts that were done by scanning the table.' + ), + 'Table_locks_immediate' => __( + 'The number of times that a table lock was acquired immediately.' + ), + 'Table_locks_waited' => __( + 'The number of times that a table lock could not be acquired' + . ' immediately and a wait was needed. If this is high, and you have' + . ' performance problems, you should first optimize your queries,' + . ' and then either split your table or tables or use replication.' + ), + 'Threads_cached' => __( + 'The number of threads in the thread cache. The cache hit rate can' + . ' be calculated as Threads_created/Connections. If this value is' + . ' red you should raise your thread_cache_size.' + ), + 'Threads_connected' => __( + 'The number of currently open connections.' + ), + 'Threads_created' => __( + 'The number of threads created to handle connections. If' + . ' Threads_created is big, you may want to increase the' + . ' thread_cache_size value. (Normally this doesn\'t give a notable' + . ' performance improvement if you have a good thread' + . ' implementation.)' + ), + 'Threads_cache_hitrate_%' => __( + 'Thread cache hit rate (calculated value)' + ), + 'Threads_running' => __( + 'The number of threads that are not sleeping.' + ) + ); +} + +?> |