Newsgroups: php.internals Path: news.php.net Xref: news.php.net php.internals:49044 Return-Path: Mailing-List: contact internals-help@lists.php.net; run by ezmlm Delivered-To: mailing list internals@lists.php.net Received: (qmail 34152 invoked from network); 13 Jul 2010 09:08:42 -0000 Received: from unknown (HELO lists.php.net) (127.0.0.1) by localhost with SMTP; 13 Jul 2010 09:08:42 -0000 Authentication-Results: pb1.pair.com smtp.mail=v.damore@gmail.com; spf=pass; sender-id=pass Authentication-Results: pb1.pair.com header.from=v.damore@gmail.com; sender-id=pass; domainkeys=bad Received-SPF: pass (pb1.pair.com: domain gmail.com designates 209.85.215.170 as permitted sender) DomainKey-Status: bad X-DomainKeys: Ecelerity dk_validate implementing draft-delany-domainkeys-base-01 X-PHP-List-Original-Sender: v.damore@gmail.com X-Host-Fingerprint: 209.85.215.170 mail-ey0-f170.google.com Received: from [209.85.215.170] ([209.85.215.170:47204] helo=mail-ey0-f170.google.com) by pb1.pair.com (ecelerity 2.1.1.9-wez r(12769M)) with ESMTP id 6A/80-30727-91D2C3C4 for ; Tue, 13 Jul 2010 05:08:41 -0400 Received: by eyh6 with SMTP id 6so823357eyh.29 for ; Tue, 13 Jul 2010 02:08:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:mime-version:received:in-reply-to :references:from:date:message-id:subject:to:content-type; bh=p4CrYtHLUJrYTBzw1ffsxR1HAFw4MzRzAntYrxcTS2c=; b=IVP2xHoa7y3TJY42NhWCeJQGXXEI4qinfi3VffHTh2JIEeQ+GHGgo1UGgUYSHRufXN aQjl1iBGq4eRMaRC2KJL/DeGm7KDzPCOV8q/3zD5y7bNRPhVp2PRijsRWgcOy1PAWzUC Ss4ib/f+em7J1UNqhNAcnz/sIXfmLnr0qd4V8= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type; b=QPSdlgc/c3xMWH6Q98EV9/NuOODPAos35PheteaAZtFC7DxdEs04U5tucHaI3Fiecf a4bwMQLJsaCwo0plPbyRSBZVaYqH1gbxO33uFoIHksb3egxZujJtosxnK50NC2JxiwPZ HvKhpxfdM695E9NXhJSFvAUu90Bb+gJBFj84I= Received: by 10.239.135.10 with SMTP id b10mr1212590hbb.144.1279012117265; Tue, 13 Jul 2010 02:08:37 -0700 (PDT) MIME-Version: 1.0 Received: by 10.239.186.148 with HTTP; Tue, 13 Jul 2010 02:08:17 -0700 (PDT) In-Reply-To: References: Date: Tue, 13 Jul 2010 11:08:17 +0200 Message-ID: To: internals@lists.php.net Content-Type: multipart/alternative; boundary=001636457cbee9bcb4048b413661 Subject: Re: Performance problem with php From: v.damore@gmail.com ("Vincenzo D'Amore") --001636457cbee9bcb4048b413661 Content-Type: text/plain; charset=UTF-8 Hello All, could anybody explain me why if safe_mode or open_basedir are set, realpath cache is disabled? Looking at source code main/main.c of 5.2.13 I can see: 1292: /* Disable realpath cache if safe_mode or open_basedir are set */ if (PG(safe_mode) || (PG(open_basedir) && *PG(open_basedir))) { CWDG(realpath_cache_size_limit) = 0; } 1769: /* Disable realpath cache if safe_mode or open_basedir are set */ if (PG(safe_mode) || (PG(open_basedir) && *PG(open_basedir))) { CWDG(realpath_cache_size_limit) = 0; } So realpath cache is definitely disabled in case of safe_mode or open_basedir. This dramatically reduce performance of PHP Engine and, in a big production environment, this behavior can bring servers to its knees. Especially because there is a lack of documentation! On Fri, Jul 9, 2010 at 7:39 PM, Vincenzo D'Amore wrote: > Hello all, > > I have already notified to the mailing list a performance problem with > apache/mod_php5. > > Now I have an update and I think this is probably a bug. > PHP lstat the full path more times before read the file when in apache > httpd configuration is specified *PHP_ADMIN_VALUE open_basedir *setting. > > I have a simple website with only phpinfo.php page and inside we have only > "". > > httpd.2.2.15 fresh compiled and PHP 5.2.13. > > If is specified *PHP_ADMIN_VALUE open_basedir* in Virtual host > configuration: > > > * PHP_ADMIN_VALUE open_basedir > "/usr/local/myspace/webspace"* > > > ServerName damorealt.xoom.it > DocumentRoot "/usr/local/myspace/webspace/httpdocs" > CustomLog /var/log/httpd/damorealt/access_log combined > ErrorLog /var/log/httpd/damorealt/error_log > > > Calling page http://damorealt.xoom.it/phpinfo.php we can reproduce > following behavior: > > 25933 accept(3, {sa_family=AF_INET, sin_port=htons(47433), > sin_addr=inet_addr("212.48.14.186")}, [17179869200]) = 15 > 25933 getsockname(15, {sa_family=AF_INET, sin_port=htons(80), > sin_addr=inet_addr("151.99.197.198")}, [17179869200]) = 0 > 25933 fcntl(15, F_GETFL) = 0x2 (flags O_RDWR) > 25933 fcntl(15, F_SETFL, O_RDWR|O_NONBLOCK) = 0 > 25933 read(15, "GET /phpinfo.php HTTP/1.0\r\nUser-"..., 8000) = 129 > 25933 gettimeofday({1278695388, 52976}, NULL) = 0 > 25933 stat("/usr/local/myspace/webspace/httpdocs/phpinfo.php", > {st_mode=S_IFREG|0644, st_size=16, ...}) = 0 > 25933 open("/usr/local/myspace/.htaccess", O_RDONLY) = -1 ENOENT (No such > file or directory) > 25933 open("/usr/local/myspace/webspace/.htaccess", O_RDONLY) = -1 ENOENT > (No such file or directory) > 25933 open("/usr/local/myspace/webspace/httpdocs/.htaccess", O_RDONLY) = -1 > ENOENT (No such file or directory) > 25933 open("/usr/local/myspace/webspace/httpdocs/phpinfo.php/.htaccess", > O_RDONLY) = -1 ENOTDIR (Not a directory) > 25933 setitimer(ITIMER_PROF, {it_interval={0, 0}, it_value={20, 0}}, NULL) > = 0 > 25933 rt_sigaction(SIGPROF, {0x2b80442fdd80, [PROF], > SA_RESTORER|SA_RESTART, 0x3916e302d0}, {SIG_DFL, [], 0}, 8) = 0 > 25933 rt_sigprocmask(SIG_UNBLOCK, [PROF], NULL, 8) = 0 > 25933 getcwd("/"..., 4095) = 2 > 25933 chdir("/usr/local/myspace/webspace/httpdocs") = 0 > > *water boiling point* > > 25933 lstat("/usr", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 > 25933 lstat("/usr/local", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 > 25933 lstat("/usr/local/myspace", {st_mode=S_IFDIR|0755, st_size=4096, > ...}) = 0 > 25933 lstat("/usr/local/myspace/webspace", {st_mode=S_IFDIR|0755, > st_size=4096, ...}) = 0 > 25933 lstat("/usr/local/myspace/webspace/httpdocs", {st_mode=S_IFDIR|0755, > st_size=4096, ...}) = 0 > 25933 lstat("/usr/local/myspace/webspace/httpdocs/phpinfo.php", > {st_mode=S_IFREG|0644, st_size=16, ...}) = 0 > > First check > > 25933 lstat("/usr", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 > 25933 lstat("/usr/local", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 > 25933 lstat("/usr/local/myspace", {st_mode=S_IFDIR|0755, st_size=4096, > ...}) = 0 > 25933 lstat("/usr/local/myspace/webspace", {st_mode=S_IFDIR|0755, > st_size=4096, ...}) = 0 > 25933 lstat("/usr/local/myspace/webspace/httpdocs", {st_mode=S_IFDIR|0755, > st_size=4096, ...}) = 0 > 25933 lstat("/usr/local/myspace/webspace/httpdocs/phpinfo.php", > {st_mode=S_IFREG|0644, st_size=16, ...}) = 0 > > Second check > > 25933 lstat("/usr", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 > 25933 lstat("/usr/local", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 > 25933 lstat("/usr/local/myspace", {st_mode=S_IFDIR|0755, st_size=4096, > ...}) = 0 > 25933 lstat("/usr/local/myspace/webspace", {st_mode=S_IFDIR|0755, > st_size=4096, ...}) = 0 > > Third check (incomplete) > > 25933 lstat("/usr", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 > 25933 lstat("/usr/local", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 > 25933 lstat("/usr/local/myspace", {st_mode=S_IFDIR|0755, st_size=4096, > ...}) = 0 > 25933 lstat("/usr/local/myspace/webspace", {st_mode=S_IFDIR|0755, > st_size=4096, ...}) = 0 > 25933 lstat("/usr/local/myspace/webspace/httpdocs", {st_mode=S_IFDIR|0755, > st_size=4096, ...}) = 0 > 25933 lstat("/usr/local/myspace/webspace/httpdocs/phpinfo.php", > {st_mode=S_IFREG|0644, st_size=16, ...}) = 0 > > Final check and then read the file. > > 25933 open("/usr/local/myspace/webspace/httpdocs/phpinfo.php", O_RDONLY) = > 16 > 25933 fstat(16, {st_mode=S_IFREG|0644, st_size=16, ...}) = 0 > 25933 read(16, "\n", 8192) = 16 > 25933 read(16, "", 8192) = 0 > 25933 read(16, "", 8192) = 0 > 25933 close(16) = 0 > > > If *PHP_ADMIN_VALUE open_basedir "/usr/local/myspace/webspace" is removed > * in virtual host configuration we finally have simpliest behavior: > > 226235 accept(3, {sa_family=AF_INET, sin_port=htons(59366), > sin_addr=inet_addr("212.48.14.186")}, [17179869200]) = 15 > 26235 getsockname(15, {sa_family=AF_INET, sin_port=htons(80), > sin_addr=inet_addr("151.99.197.198")}, [17179869200]) = 0 > 26235 fcntl(15, F_GETFL) = 0x2 (flags O_RDWR) > 26235 fcntl(15, F_SETFL, O_RDWR|O_NONBLOCK) = 0 > 26235 read(15, "GET /phpinfo.php HTTP/1.0\r\nUser-"..., 8000) = 129 > 26235 gettimeofday({1278696735, 988799}, NULL) = 0 > 26235 stat("/usr/local/myspace/webspace/httpdocs/phpinfo.php", > {st_mode=S_IFREG|0644, st_size=16, ...}) = 0 > 26235 open("/usr/local/myspace/.htaccess", O_RDONLY) = -1 ENOENT (No such > file or directory) > 26235 open("/usr/local/myspace/webspace/.htaccess", O_RDONLY) = -1 ENOENT > (No such file or directory) > 26235 open("/usr/local/myspace/webspace/httpdocs/.htaccess", O_RDONLY) = -1 > ENOENT (No such file or directory) > 26235 open("/usr/local/myspace/webspace/httpdocs/phpinfo.php/.htaccess", > O_RDONLY) = -1 ENOTDIR (Not a directory) > 26235 setitimer(ITIMER_PROF, {it_interval={0, 0}, it_value={20, 0}}, NULL) > = 0 > 26235 rt_sigaction(SIGPROF, {0x2afef587dd80, [PROF], > SA_RESTORER|SA_RESTART, 0x3916e302d0}, {SIG_DFL, [], 0}, 8) = 0 > 26235 rt_sigprocmask(SIG_UNBLOCK, [PROF], NULL, 8) = 0 > 26235 getcwd("/"..., 4095) = 2 > 26235 chdir("/usr/local/myspace/webspace/httpdocs") = 0 > > *water boiling point* > > 26235 time(NULL) = 1278696735 > 26235 lstat("/usr", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 > 26235 lstat("/usr/local", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 > 26235 lstat("/usr/local/myspace", {st_mode=S_IFDIR|0755, st_size=4096, > ...}) = 0 > 26235 lstat("/usr/local/myspace/webspace", {st_mode=S_IFDIR|0755, > st_size=4096, ...}) = 0 > 26235 lstat("/usr/local/myspace/webspace/httpdocs", {st_mode=S_IFDIR|0755, > st_size=4096, ...}) = 0 > 26235 lstat("/usr/local/myspace/webspace/httpdocs/phpinfo.php", > {st_mode=S_IFREG|0644, st_size=16, ...}) = 0 > > And read the file. > > 26235 open("/usr/local/myspace/webspace/httpdocs/phpinfo.php", O_RDONLY) = > 16 > 26235 fstat(16, {st_mode=S_IFREG|0644, st_size=16, ...}) = 0 > 26235 read(16, "\n", 8192) = 16 > 26235 read(16, "", 8192) = 0 > 26235 read(16, "", 8192) = 0 > 26235 close(16) = 0 > 26235 uname({sys="Linux", node="svilpar4", ...}) = 0 > 26235 time(NULL) = 1278696735 > 26235 writev(15, [{"HTTP/1.1 200 OK\r\nDate: Fri, 09 J"..., 173}, > {" cellpadding=\"3"..., 4101}], 3) = 8383 > 26235 writev(15, [{"highlight.bg {"sendmail_from"..., 4099}], 2) = 8204 > 26235 time(NULL) = 1278696735 > 26235 writev(15, [{" \nHT"..., 4108}, > {"1024 26235 writev(15, [{"md2 md4 md5 sha1 sha256 sha384 s"..., 4098}, {" > \n
\n 26235 writev(15, [{"session.use_cookies enabled 26235 chdir("/") = 0 > 26235 setitimer(ITIMER_PROF, {it_interval={0, 0}, it_value={0, 0}}, NULL) = > 0 > 26235 writev(15, [{"\"]Keep-Alive<"..., 4206}], 1) = > 4206 > 26235 write(10, "212.48.14.186 - - [09/Jul/2010:1"..., 116) = 116 > 26235 shutdown(15, 1 /* send */) = 0 > 26235 poll([{fd=15, events=POLLIN}], 1, 2000) = 1 ([{fd=15, > revents=POLLIN|POLLHUP}]) > 26235 read(15, "", 512) = 0 > 26235 close(15) = 0 > 26235 read(4, 0x7fff615ff5eb, 1) = -1 EAGAIN (Resource temporarily > unavailable) > 26235 accept(3, > > Note that this behavior also happens when safemode is ON. > > Can somebody explain me why PHP have such behavior? > > Best regards, > Vincenzo > -- Vincenzo D'Amore email: v.damore@gmail.com msn: freedev@hotmail.com skype: free.dev mobile: +39 349 8513251 --001636457cbee9bcb4048b413661--