Php 为什么我的Drupal间歇性地慢？Stracing显示了大量重复的sendto调用

我管理的一个Drupal站点偶尔加载速度非常慢。如果我在这种情况发生时浏览PHP-FPM，我会看到许多

poll

/

recvfrom

/

sendto

系统调用的内容似乎相同：

[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24589, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, "\207\2\0\0\3INSERT INTO menu_router\n   "..., 651, MSG_DONTWAIT, NULL, 0) = 651
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24578, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, "\\\2\0\0\3INSERT INTO menu_router\n   "..., 608, MSG_DONTWAIT, NULL, 0) = 608
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24567, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, "T\2\0\0\3INSERT INTO menu_router\n   "..., 600, MSG_DONTWAIT, NULL, 0) = 600
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24556, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, "2\2\0\0\3INSERT INTO menu_router\n   "..., 566, MSG_DONTWAIT, NULL, 0) = 566
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24545, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, "\37\2\0\0\3INSERT INTO menu_router\n   "..., 547, MSG_DONTWAIT, NULL, 0) = 547
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24534, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, "\r\2\0\0\3INSERT INTO menu_router\n   "..., 529, MSG_DONTWAIT, NULL, 0) = 529
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24523, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, "B\2\0\0\3INSERT INTO menu_router\n   "..., 582, MSG_DONTWAIT, NULL, 0) = 582
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24512, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, ":\2\0\0\3INSERT INTO menu_router\n   "..., 574, MSG_DONTWAIT, NULL, 0) = 574
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24501, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, "(\2\0\0\3INSERT INTO menu_router\n   "..., 556, MSG_DONTWAIT, NULL, 0) = 556
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24490, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, "4\2\0\0\3INSERT INTO menu_router\n   "..., 568, MSG_DONTWAIT, NULL, 0) = 568
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24479, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, "(\2\0\0\3INSERT INTO menu_router\n   "..., 556, MSG_DONTWAIT, NULL, 0) = 556
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24468, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, " \2\0\0\3INSERT INTO menu_router\n   "..., 548, MSG_DONTWAIT, NULL, 0) = 548
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24457, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, ",\2\0\0\3INSERT INTO menu_router\n   "..., 560, MSG_DONTWAIT, NULL, 0) = 560
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24446, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, "\30\2\0\0\3INSERT INTO menu_router\n   "..., 540, MSG_DONTWAIT, NULL, 0) = 540
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24435, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, "6\2\0\0\3INSERT INTO menu_router\n   "..., 570, MSG_DONTWAIT, NULL, 0) = 570
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24424, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, "\253\2\0\0\3INSERT INTO menu_router\n   "..., 687, MSG_DONTWAIT, NULL, 0) = 687
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24413, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, "\206\6\0\0\3INSERT INTO menu_router\n   "..., 1674, MSG_DONTWAIT, NULL, 0) = 1674
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24402, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, "!\2\0\0\3INSERT INTO menu_router\n   "..., 549, MSG_DONTWAIT, NULL, 0) = 549
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24391, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, "3\2\0\0\3INSERT INTO menu_router\n   "..., 567, MSG_DONTWAIT, NULL, 0) = 567
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24380, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, "$\2\0\0\3INSERT INTO menu_router\n   "..., 552, MSG_DONTWAIT, NULL, 0) = 552
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24369, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, "*\2\0\0\3INSERT INTO menu_router\n   "..., 558, MSG_DONTWAIT, NULL, 0) = 558
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24358, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, "9\2\0\0\3INSERT INTO menu_router\n   "..., 573, MSG_DONTWAIT, NULL, 0) = 573
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24347, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, "*\2\0\0\3INSERT INTO menu_router\n   "..., 558, MSG_DONTWAIT, NULL, 0) = 558
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24336, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, "-\2\0\0\3INSERT INTO menu_router\n   "..., 561, MSG_DONTWAIT, NULL, 0) = 561
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24325, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, "\33\2\0\0\3INSERT INTO menu_router\n   "..., 543, MSG_DONTWAIT, NULL, 0) = 543
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928) = 1 ([{fd=5, revents=POLLIN}])
[pid 27381] recvfrom(5, "\7\0\0\1\0\1\0\2\0\0\0", 24314, MSG_DONTWAIT, NULL, NULL) = 11
[pid 27381] sendto(5, "\6\2\0\0\3INSERT INTO menu_router\n   "..., 522, MSG_DONTWAIT, NULL, 0) = 522
[pid 27381] poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 1471228928 <unfinished ...>

[pid 27381]recvfrom（5，“\7\0\0\1\0\2\0\0\1”，24589，MSG_DONTWAIT，NULL，NULL）=11
[pid 27381]发送到（5，“\207\2\0\0\3插入到菜单\u router\n”…，651，MSG_DONTWAIT，NULL，0）=651
[pid 27381]poll（[{fd=5，events=POLLIN | POLLERR | POLLHUP}]，1147128928）=1（[{fd=5，revents=POLLIN}）
[pid 27381]recvfrom（5，“\7\0\0\1\0\1\0\2\0\0\0”，24578，MSG\u DONTWAIT，NULL，NULL）=11
[pid 27381]发送到（5，“\\\2\0\0\3插入到菜单\u router\n”…，608，MSG\u DONTWAIT，NULL，0）=608
[pid 27381]poll（[{fd=5，events=POLLIN | POLLERR | POLLHUP}]，1147128928）=1（[{fd=5，revents=POLLIN}）
[pid 27381]recvfrom（5，“\7\0\0\1\0\1\0\2\0\0\0\0”，24567，MSG\u DONTWAIT，NULL，NULL）=11
[pid 27381]发送到（5，“T\2\0\0\3插入到菜单\u router\n”…，600，MSG\u DONTWAIT，NULL，0）=600
[pid 27381]poll（[{fd=5，events=POLLIN | POLLERR | POLLHUP}]，1147128928）=1（[{fd=5，revents=POLLIN}）
[pid 27381]recvfrom（5，“\7\0\0\1\0\1\0\2\0\0\0”，24556，MSG\u DONTWAIT，NULL，NULL）=11
[pid 27381]发送到（5，“2\2\0\0\3插入到菜单\u router\n”…，566，MSG\u DONTWAIT，NULL，0）=566
[pid 27381]poll（[{fd=5，events=POLLIN | POLLERR | POLLHUP}]，1147128928）=1（[{fd=5，revents=POLLIN}）
[pid 27381]recvfrom（5，“\7\0\0\1\0\1\0\2\0\0\0”，24545，MSG\u DONTWAIT，NULL，NULL）=11
[pid 27381]发送到（5，“\37\2\0\0\3插入到菜单\u router\n”…，547，MSG\u DONTWAIT，NULL，0）=547
[pid 27381]poll（[{fd=5，events=POLLIN | POLLERR | POLLHUP}]，1147128928）=1（[{fd=5，revents=POLLIN}）
[pid 27381]recvfrom（5，“\7\0\0\1\0\1\0\2\0\0\0”，24534，MSG\u DONTWAIT，NULL，NULL）=11
[pid 27381]发送到（5），“\r\2\0\0\3插入到菜单\u router\n”…，529，MSG\u DONTWAIT，NULL，0）=529
[pid 27381]poll（[{fd=5，events=POLLIN | POLLERR | POLLHUP}]，1147128928）=1（[{fd=5，revents=POLLIN}）
[pid 27381]recvfrom（5，“\7\0\0\1\0\1\0\2\0\0\0”，24523，MSG\u DONTWAIT，NULL，NULL）=11
[pid 27381]发送到（5，“B\2\0\0\3插入到菜单\u router\n”…，582，MSG\u DONTWAIT，NULL，0）=582
[pid 27381]poll（[{fd=5，events=POLLIN | POLLERR | POLLHUP}]，1147128928）=1（[{fd=5，revents=POLLIN}）
[pid 27381]recvfrom（5，“\7\0\0\1\0\1\0\2\0\0\0”，24512，MSG\u DONTWAIT，NULL，NULL）=11
[pid 27381]发送到（5，”：\2\0\0\3插入到菜单\u router\n“…，574，MSG\u DONTWAIT，NULL，0）=574
[pid 27381]poll（[{fd=5，events=POLLIN | POLLERR | POLLHUP}]，1147128928）=1（[{fd=5，revents=POLLIN}）
[pid 27381]recvfrom（5，“\7\0\0\1\0\1\0\2\0\0\0”，24501，MSG\u DONTWAIT，NULL，NULL）=11
[pid 27381]发送到（5），（\2\0\0\3插入到菜单\u router\n“…，556，MSG\u DONTWAIT，NULL，0）=556
[pid 27381]poll（[{fd=5，events=POLLIN | POLLERR | POLLHUP}]，1147128928）=1（[{fd=5，revents=POLLIN}）
[pid 27381]recvfrom（5，“\7\0\0\1\0\1\0\2\0\0\0\0”，24490，MSG_DONTWAIT，NULL，NULL）=11
[pid 27381]发送到（5，“4\2\0\0\3插入到菜单\u router\n”…，568，MSG\u DONTWAIT，NULL，0）=568
[pid 27381]poll（[{fd=5，events=POLLIN | POLLERR | POLLHUP}]，1147128928）=1（[{fd=5，revents=POLLIN}）
[pid 27381]recvfrom（5，“\7\0\0\1\0\1\0\2\0\0\0\0”，24479，MSG\u DONTWAIT，NULL，NULL）=11
[pid 27381]发送到（5），（\2\0\0\3插入到菜单\u router\n“…，556，MSG\u DONTWAIT，NULL，0）=556
[pid 27381]poll（[{fd=5，events=POLLIN | POLLERR | POLLHUP}]，1147128928）=1（[{fd=5，revents=POLLIN}）
[pid 27381]recvfrom（5，“\7\0\0\1\0\1\0\2\0\0\0”，24468，MSG\u DONTWAIT，NULL，NULL）=11
[pid 27381]发送到（5），“\2\0\0\3插入到菜单\u router\n”…，548，MSG\u DONTWAIT，NULL，0）=548
[pid 27381]poll（[{fd=5，events=POLLIN | POLLERR | POLLHUP}]，1147128928）=1（[{fd=5，revents=POLLIN}）
[pid 27381]recvfrom（5，“\7\0\0\1\0\1\0\2\0\0\0”，24457，MSG\u DONTWAIT，NULL，NULL）=11
[pid 27381]发送到（5，，\2\0\0\3插入到菜单\u router\n“…，560，MSG\u DONTWAIT，NULL，0）=560
[pid 27381]poll（[{fd=5，events=POLLIN | POLLERR | POLLHUP}]，1147128928）=1（[{fd=5，revents=POLLIN}）
[pid 27381]recvfrom（5，“\7\0\0\1\0\1\0\2\0\0\0”，24446，MSG\u DONTWAIT，NULL，NULL）=11
[pid 27381]发送到（5，“\30\2\0\0\3插入到菜单\u router\n”…，540，MSG\u DONTWAIT，NULL，0）=540
[pid 27381]poll（[{fd=5，events=POLLIN | POLLERR | POLLHUP}]，1147128928）=1（[{fd=5，revents=POLLIN}）
[pid 27381]recvfrom（5，“\7\0\0\1\0\1\0\2\0\0\0\0”，24435，MSG_DONTWAIT，NULL，NULL）=11
[pid 27381]发送到（5，“6\2\0\0\3插入到菜单\u router\n”…，570，MSG\u DONTWAIT，NULL，0）=570
[pid 27381]poll（[{fd=5，events=POLLIN | POLLERR | POLLHUP}]，1147128928）=1（[{fd=5，revents=POLLIN}）
[pid 27381]recvfrom（5，“\7\0\0\1\0\1\0\2\0\0\0”，24424，MSG_DONTWAIT，NULL，NULL）=11
[pid 27381]发送到（5，“\253\2\0\0\3插入到菜单\u router\n”…，687，MSG\u DONTWAIT，NULL，0）=687
[pid 27381]poll（[{fd=5，events=POLLIN | POLLERR | POLLHUP}]，1147128928）=1（[{fd=5，revents=POLLIN}）
[pid 27381]recvfrom（5，“\7\0\0\1\0\1\0\2\0\0\0”，24413，MSG\u DONTWAIT，NULL，NULL）=11
[pid 27381]发送到（5，“\206\6\0\0\3插入到菜单\u router\n”…，1674，MSG\u DONTWAIT，NULL，0）=1674
[pid 27381]poll（[{fd=5，events=POLLIN | POLLERR | POLLHUP}]，1147128928）=1（[{fd=5，revents=POLLIN}）
[pid 27381]recvfrom（5，“\7\0\0\1\0\1\0\2\0\0\0\0”，24402，MSG\u DONTWAIT，NULL，NULL）=11
[pid 27381]发送到（5，“！\2\0\0\3插入到菜单\u路由器\n”…，549，MSG\u DONTWAIT，NULL，0）=549
[pid 27381]poll（[{fd=5，events=POLLIN | POLLERR | POLLHUP}]，1147128928）=1（[{fd=5，revents=POLLIN}）
[pid 27381]recvfrom（5，“\7\0\0\1\0\1\0\2\0\0\0\0”，24391，MSG\u DONTWAIT，NULL，NULL）=11
[pid 27381]发送到（5，“3\2\0\0\3插入到菜单\u router\n”…，567，MSG\u DONTWAIT，NULL，0）=567
[pid 27381]poll（[{fd=5，events=POLLIN | POLLERR | POLLHUP}]，1147128928）=1（[{fd=5，revents=POLLIN}）
[pid 27381]recvfrom（5，“\7\0\0\1\0\1\0\2\0\0\0”，24380，MSG\u DONTWAIT，NULL，NULL）=11
[pid 27381]森
function menu_rebuild() {
  dd(debug_backtrace()); // Adding temporary debug line.