2013-01-28から1日間の記事一覧

MySQL SHOW STATUS - 接続数を確認する

コマンド $ mysql -uroot -e 'show status' | grep -E 'Max|Threads' Max_used_connections 12 Threads_cached 0 Threads_connected 1 Threads_created 13280 Threads_running 1 Max_used_connections The maximum number of connections that have been in …

evalとreturn

#!/usr/env/perl use strict; use warnings; sub eval_func { eval { return 1; }; if ($@) { return 0; } } my $res = eval_func; printf "%s\n", $res; # $res is blank!!! ハマった。perldoc -f evalしてみると... In both forms, the value returned is …