そのため、いくつかのスリープ接続で strace を実行した後、修正した (strace から削除された) いくつかの問題に遭遇しましたが、この strace の結果から他に何かに気付くことができるかどうか疑問に思っていました。
ntp netstat から分析すると、しばらくすると CLOSE_WAIT であることがわかるのは、mysql のスリープ状態です。通常、いくつかのスリープ状態の接続にヒットし、最終的にサーバーが半分になります。
Process 13948 attached - interrupt to quit
read(14, "\21V\257\305\302\365\320\326", 8) = 8
close(14) = 0
mlock(0x1b50d70, 24) = 0
mlock(0xb766da80, 10624) = 0
gettimeofday({1369138768, 45552}, NULL) = 0
write(2, "[Tue May 21 07:19:28 2013] [erro"..., 187) = 187
gettimeofday({1369138768, 45621}, NULL) = 0
write(2, "[Tue May 21 07:19:28 2013] [erro"..., 195) = 195
getcwd("/home/site-name/site-name/current/www", 4096) = 39
time(NULL) = 1369138768
lstat64("/home/site-name/site-name/current/www/./Zend/Cache/Backend/File.php", 0xbfeb553c) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
lstat64("/usr/share/pear/Zend/Cache/Backend/File.php", 0xbfeb553c) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
lstat64("/usr/share/php/Zend/Cache/Backend/File.php", 0xbfeb553c) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
lstat64("/home/site-name/site-name/current/lib/Zend/Cache/Backend/File.php", {st_mode=S_IFREG|0777, st_size=34079, ...}) = 0
lstat64("/home/site-name/site-name/current/lib/Zend/Cache/Backend", {st_mode=S_IFDIR|0777, st_size=4096, ...}) = 0
lstat64("/home/site-name/site-name/current/lib/Zend/Cache", {st_mode=S_IFDIR|0777, st_size=4096, ...}) = 0
lstat64("/home/site-name/site-name/current/lib/Zend", {st_mode=S_IFDIR|0777, st_size=4096, ...}) = 0
lstat64("/home/site-name/site-name/current/lib", {st_mode=S_IFDIR|0777, st_size=4096, ...}) = 0
lstat64("/home/site-name/site-name/current", {st_mode=S_IFDIR|0777, st_size=4096, ...}) = 0
lstat64("/home/site-name/site-name", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
lstat64("/home/site-name", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
lstat64("/home", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
stat64("/home/site-name/site-name/current/temp", {st_mode=S_IFDIR|0777, st_size=4096, ...}) = 0
access("/home/site-name/site-name/current/temp", W_OK) = 0
time(NULL) = 1369138768
lstat64("/home/site-name/site-name/current/temp", {st_mode=S_IFDIR|0777, st_size=4096, ...}) = 0
getcwd("/home/site-name/site-name/current/www", 4096) = 39
time(NULL) = 1369138768
lstat64("/home/site-name/site-name/current/www/./Zend/Cache/Core.php", 0xbfeb553c) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
lstat64("/usr/share/pear/Zend/Cache/Core.php", 0xbfeb553c) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
lstat64("/usr/share/php/Zend/Cache/Core.php", 0xbfeb553c) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
lstat64("/home/site-name/site-name/current/lib/Zend/Cache/Core.php", {st_mode=S_IFREG|0777, st_size=23895, ...}) = 0
stat64("/home/site-name/site-name/current/temp/zend_cache---internal-metadatas---published_letters_S_0_T_4_E_1", {st_mode=S_IFREG|0600, st_size=99, ...}) = 0
time(NULL) = 1369138768
lstat64("/home/site-name/site-name/current/temp/zend_cache---internal-metadatas---published_letters_S_0_T_4_E_1", {st_mode=S_IFREG|0600, st_size=99, ...}) = 0
open("/home/site-name/site-name/current/temp/zend_cache---internal-metadatas---published_letters_S_0_T_4_E_1", O_RDONLY) = 14
fstat64(14, {st_mode=S_IFREG|0600, st_size=99, ...}) = 0
lseek(14, 0, SEEK_CUR) = 0
flock(14, LOCK_SH) = 0
fstat64(14, {st_mode=S_IFREG|0600, st_size=99, ...}) = 0
read(14, "a:4:{s:4:\"hash\";i:-1389558010;s:"..., 8192) = 99
read(14, "", 8192) = 0
read(14, "", 8192) = 0
flock(14, LOCK_UN) = 0
close(14) = 0
time(NULL) = 1369138768
stat64("/home/site-name/site-name/current/temp/zend_cache---published_letters_S_0_T_4_E_1", {st_mode=S_IFREG|0600, st_size=3981, ...}) = 0
time(NULL) = 1369138768
lstat64("/home/site-name/site-name/current/temp/zend_cache---published_letters_S_0_T_4_E_1", {st_mode=S_IFREG|0600, st_size=3981, ...}) = 0
open("/home/site-name/site-name/current/temp/zend_cache---published_letters_S_0_T_4_E_1", O_RDONLY) = 14
fstat64(14, {st_mode=S_IFREG|0600, st_size=3981, ...}) = 0
lseek(14, 0, SEEK_CUR) = 0
flock(14, LOCK_SH) = 0
fstat64(14, {st_mode=S_IFREG|0600, st_size=3981, ...}) = 0
read(14, "s:3971:\"a:2:{s:7:\"results\";a:4:{"..., 8192) = 3981
read(14, "", 8192) = 0
read(14, "", 8192) = 0
flock(14, LOCK_UN) = 0
close(14) = 0
time(NULL) = 1369138768
gettimeofday({1369138768, 47925}, NULL) = 0
write(2, "[Tue May 21 07:19:28 2013] [erro"..., 521) = 521
time(NULL) = 1369138768
time(NULL) = 1369138768
time(NULL) = 1369138768
gettimeofday({1369138768, 48061}, NULL) = 0
write(2, "[Tue May 21 07:19:28 2013] [erro"..., 516) = 516
time(NULL) = 1369138768
gettimeofday({1369138768, 48154}, NULL) = 0
write(2, "[Tue May 21 07:19:28 2013] [erro"..., 516) = 516
time(NULL) = 1369138768
time(NULL) = 1369138768
gettimeofday({1369138768, 48295}, NULL) = 0
write(2, "[Tue May 21 07:19:28 2013] [erro"..., 493) = 493
time(NULL) = 1369138768
gettimeofday({1369138768, 48412}, NULL) = 0
write(2, "[Tue May 21 07:19:28 2013] [erro"..., 499) = 499
time(NULL) = 1369138768
time(NULL) = 1369138768
gettimeofday({1369138768, 48530}, NULL) = 0
write(2, "[Tue May 21 07:19:28 2013] [erro"..., 499) = 499
time(NULL) = 1369138768
time(NULL) = 1369138768
gettimeofday({1369138768, 48642}, NULL) = 0
write(2, "[Tue May 21 07:19:28 2013] [erro"..., 499) = 499
time(NULL) = 1369138768
time(NULL) = 1369138768
gettimeofday({1369138768, 48751}, NULL) = 0
write(2, "[Tue May 21 07:19:28 2013] [erro"..., 499) = 499
time(NULL) = 1369138768
time(NULL) = 1369138768
time(NULL) = 1369138768
time(NULL) = 1369138768
lstat64("/home/site-name/site-name/current/app/models/Member.php", {st_mode=S_IFREG|0777, st_size=21802, ...}) = 0
lstat64("/home/site-name/site-name/current/app/models", {st_mode=S_IFDIR|0777, st_size=4096, ...}) = 0
lstat64("/home/site-name/site-name/current/app", {st_mode=S_IFDIR|0777, st_size=4096, ...}) = 0
poll([{fd=13, events=POLLIN|POLLPRI}], 1, 0) = 1 ([{fd=13, revents=POLLIN}])
read(13, "", 8192) = 0
shutdown(13, 2 /* send and receive */) = 0
close(13) = 0
getcwd("/home/site-name/site-name/current/www", 4096) = 39
time(NULL) = 1369138768
lstat64("/home/site-name/site-name/current/www/./Zend/Db/Statement/Exception.php", 0xbfeb552c) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
lstat64("/usr/share/pear/Zend/Db/Statement/Exception.php", 0xbfeb552c) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
lstat64("/usr/share/php/Zend/Db/Statement/Exception.php", 0xbfeb552c) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
lstat64("/home/site-name/site-name/current/lib/Zend/Db/Statement/Exception.php", {st_mode=S_IFREG|0777, st_size=1569, ...}) = 0
lstat64("/home/site-name/site-name/current/lib/Zend/Db/Statement", {st_mode=S_IFDIR|0777, st_size=4096, ...}) = 0
lstat64("/home/site-name/site-name/current/lib/Zend/Db", {st_mode=S_IFDIR|0777, st_size=4096, ...}) = 0
time(NULL) = 1369138768
open("/home/site-name/site-name/current/lib/Zend/Db/Statement/Exception.php", O_RDONLY) = 13
fstat64(13, {st_mode=S_IFREG|0777, st_size=1569, ...}) = 0
fstat64(13, {st_mode=S_IFREG|0777, st_size=1569, ...}) = 0
fstat64(13, {st_mode=S_IFREG|0777, st_size=1569, ...}) = 0
mmap2(NULL, 1569, PROT_READ, MAP_SHARED, 13, 0) = 0xb76fb000
munmap(0xb76fb000, 1569) = 0
close(13) = 0
getcwd("/home/site-name/site-name/current/www", 4096) = 39
time(NULL) = 1369138768
lstat64("/home/site-name/site-name/current/www/./Zend/Db/Exception.php", 0xbfeb552c) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
lstat64("/usr/share/pear/Zend/Db/Exception.php", 0xbfeb552c) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
lstat64("/usr/share/php/Zend/Db/Exception.php", 0xbfeb552c) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
lstat64("/home/site-name/site-name/current/lib/Zend/Db/Exception.php", {st_mode=S_IFREG|0777, st_size=1076, ...}) = 0
time(NULL) = 1369138768
open("/home/site-name/site-name/current/lib/Zend/Db/Exception.php", O_RDONLY) = 13
fstat64(13, {st_mode=S_IFREG|0777, st_size=1076, ...}) = 0
fstat64(13, {st_mode=S_IFREG|0777, st_size=1076, ...}) = 0
fstat64(13, {st_mode=S_IFREG|0777, st_size=1076, ...}) = 0
mmap2(NULL, 1076, PROT_READ, MAP_SHARED, 13, 0) = 0xb76fb000
munmap(0xb76fb000, 1076) = 0
close(13) = 0
getcwd("/home/site-name/site-name/current/www", 4096) = 39
time(NULL) = 1369138768
lstat64("/home/site-name/site-name/current/www/./Zend/Exception.php", 0xbfeb552c) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
lstat64("/usr/share/pear/Zend/Exception.php", 0xbfeb552c) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
lstat64("/usr/share/php/Zend/Exception.php", 0xbfeb552c) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
lstat64("/home/site-name/site-name/current/lib/Zend/Exception.php", {st_mode=S_IFREG|0777, st_size=2659, ...}) = 0
time(NULL) = 1369138768
time(NULL) = 1369138768
gettimeofday({1369138768, 51202}, NULL) = 0
write(2, "[Tue May 21 07:19:28 2013] [erro"..., 489) = 489
getcwd("/home/site-name/site-name/current/www", 4096) = 39
time(NULL) = 1369138768
lstat64("/home/site-name/site-name/current/www/./Zend/Db/Statement/Exception.php", 0xbfeb51bc) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
lstat64("/usr/share/pear/Zend/Db/Statement/Exception.php", 0xbfeb51bc) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
lstat64("/usr/share/php/Zend/Db/Statement/Exception.php", 0xbfeb51bc) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
gettimeofday({1369138768, 51837}, NULL) = 0
write(2, "[Tue May 21 07:19:28 2013] [erro"..., 1189) = 1189
chdir("/") = 0
time(NULL) = 1369138768
getcwd("/", 4096) = 2
time(NULL) = 1369138768
lstat64("//./Zend/Db/Table/Select.php", 0xbfeb6ccc) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
lstat64("/usr/share/pear/Zend/Db/Table/Select.php", 0xbfeb6ccc) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
lstat64("/usr/share/php/Zend/Db/Table/Select.php", 0xbfeb6ccc) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
lstat64("/home/site-name/site-name/current/lib/Zend/Db/Table/Select.php", {st_mode=S_IFREG|0777, st_size=6665, ...}) = 0
lstat64("/home/site-name/site-name/current/lib/Zend/Db/Table", {st_mode=S_IFDIR|0777, st_size=4096, ...}) = 0
getcwd("/", 4096) = 2
time(NULL) = 1369138768
lstat64("//./Zend/Db/Statement/Exception.php", 0xbfeb6ccc) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
lstat64("/usr/share/pear/Zend/Db/Statement/Exception.php", 0xbfeb6ccc) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
lstat64("/usr/share/php/Zend/Db/Statement/Exception.php", 0xbfeb6ccc) = -1 ENOENT (No such file or directory)
time(NULL) = 1369138768
gettimeofday({1369138768, 52798}, NULL) = 0
write(2, "[Tue May 21 07:19:28 2013] [erro"..., 136) = 136
munlock(0x1b50d70, 24) = 0
munlock(0xb766da80, 10624) = 0
setitimer(ITIMER_PROF, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
writev(12, [{"HTTP/1.0 500 Internal Server Err"..., 466}, {"\37\213\10\0\0\0\0\0\0\3", 10}, {"\3\0", 2}, {"\0\0\0\0\0\0\0\0", 8}], 4) = 486
write(9, "wwww.sitename.com - - -"..., 223) = 223
shutdown(12, 1 /* send */) = 0
poll([{fd=12, events=POLLIN}], 1, 2000) = 1 ([{fd=12, revents=POLLIN|POLLHUP}])
read(12, "", 512) = 0
close(12) = 0
read(5, 0xbfebbf8f, 1) = -1 EAGAIN (Resource temporarily unavailable)