Description:
------------
The core.xxxx file appears after open opcache.

#0  0x00000000008526ab in zm_startup_core (type=<optimized out>,
    module_number=<optimized out>)
    at /home/software/php-7.1.1/Zend/zend_builtin_functions.c:399
#1  0x00007f9f363baf88 in ?? ()
#2  0x00007f9f363bc3e0 in ?? ()
#3  0x0000000000851fec in zend_clean_module_rsrc_dtors_cb (zv=0x7f9f362c37c0,
    arg=0x7f9eafe15398) at /home/software/php-7.1.1/Zend/zend_list.c:262
#4  0x00007f9f362afc00 in ?? ()
#5  0x00007f9e00000000 in ?? ()
#6  0x00007f9f362d4090 in ?? ()
#7  0x00007f9e00000c08 in ?? ()
#8  0x0000000000000001 in ?? ()
#9  0x00007f9eb5a04238 in ?? ()
#10 0x00007f9f362afc00 in ?? ()
#11 0x00007f9f362afc00 in ?? ()
#12 0x00007f9f3629c400 in ?? ()
#13 0x0000000000867529 in zend_interned_strings_init ()
    at /home/software/php-7.1.1/Zend/zend_string.c:100
#14 0x00007f9eb5a04200 in ?? ()
#15 0x0000000000000c08 in ?? ()
#16 0x00007ffc0fdfc2e0 in ?? ()
#17 0x00007ffc0fdfc2f0 in ?? ()
#18 0x00007f9f3629c400 in ?? ()
---Type <return> to continue, or q <return> to quit---
#19 0x0000000100000000 in ?? ()
#20 0x0000000000867d62 in zend_signal_register (
    handler=0x867700 <zend_signal_handler_defer>, signo=266322224)
    at /home/software/php-7.1.1/Zend/zend_signal.c:296
#21 zend_signal_activate () at /home/software/php-7.1.1/Zend/zend_signal.c:316
#22 0x00007ffc0fdfc4f0 in ?? ()
#23 0x00007f9eb7c5d538 in ?? ()
#24 0x0000000000000000 in ?? ()


maybe it is php-fpm setting. i do not know! 

php.ini:

```
[php]
engine = On
short_open_tag = Off
precision = 14
output_buffering = 4096
zlib.output_compression = Off
implicit_flush = Off
unserialize_callback_func =
serialize_precision = -1
disable_functions =
disable_classes =
zend.enable_gc = On
expose_php = On
max_execution_time = 300
max_input_time = 60
memory_limit = 128M
error_reporting = E_ALL & ~E_DEPRECATED & ~E_STRICT
display_errors = Off
display_startup_errors = Off
log_errors = On
log_errors_max_len = 1024
ignore_repeated_errors = Off
ignore_repeated_source = Off
report_memleaks = On
track_errors = Off
html_errors = On
error_log = /var/log/php/php_errors.log
variables_order = "GPCS"
request_order = "GP"
register_argc_argv = Off
auto_globals_jit = On
post_max_size = 50M
auto_prepend_file =
auto_append_file =
default_mimetype = "text/html"
default_charset = "UTF-8"
doc_root =
user_dir =
enable_dl = Off
file_uploads = On
upload_max_filesize = 50M
max_file_uploads = 20
allow_url_fopen = On
allow_url_include = Off
default_socket_timeout = 60

[CLI Server]
cli_server.color = On

[Date]

[filter]

[iconv]

[intl]

[sqlite3]

[Pcre]

[Pdo]

[Pdo_mysql]
pdo_mysql.cache_size = 2000
pdo_mysql.default_socket= /var/lib/mysql/mysql.sock

[Phar]

[mail function]
SMTP = localhost
smtp_port = 25
mail.add_x_header = On

[SQL]
sql.safe_mode = Off

[ODBC]
odbc.allow_persistent = On
odbc.check_persistent = On
odbc.max_persistent = -1
odbc.max_links = -1
odbc.defaultlrl = 4096
odbc.defaultbinmode = 1

[Interbase]
ibase.allow_persistent = 1
ibase.max_persistent = -1
ibase.max_links = -1
ibase.timestampformat = "%Y-%m-%d %H:%M:%S"
ibase.dateformat = "%Y-%m-%d"
ibase.timeformat = "%H:%M:%S"

[MySQLi]
mysqli.max_persistent = -1
mysqli.allow_persistent = On
mysqli.max_links = -1
mysqli.cache_size = 2000
mysqli.default_port = 3306
mysqli.default_socket =
mysqli.default_host =
mysqli.default_user =
mysqli.default_pw =
mysqli.reconnect = Off

[mysqlnd]
mysqlnd.collect_statistics = On
mysqlnd.collect_memory_statistics = Off

[OCI8]

[PostgreSQL]
pgsql.allow_persistent = On
pgsql.auto_reset_persistent = Off
pgsql.max_persistent = -1
pgsql.max_links = -1
pgsql.ignore_notice = 0
pgsql.log_notice = 0

[bcmath]
bcmath.scale = 0

[browscap]

[Session]
session.save_handler = files
session.use_strict_mode = 0
session.use_cookies = 1
session.use_only_cookies = 1
session.name = PHPSESSID
session.auto_start = 0
session.cookie_lifetime = 0
session.cookie_path = /
session.cookie_domain =
session.cookie_httponly =
session.serialize_handler = php
session.gc_probability = 1
session.gc_divisor = 1000
session.gc_maxlifetime = 1440
session.referer_check =
session.cache_limiter = nocache
session.cache_expire = 180
session.use_trans_sid = 0
session.sid_length = 26
session.trans_sid_tags = "a=href,area=href,frame=src,form="
session.sid_bits_per_character = 5

[Assertion]
zend.assertions = -1

[COM]

[mbstring]

[gd]

[exif]

[Tidy]
tidy.clean_output = Off

[soap]
soap.wsdl_cache_enabled=1
soap.wsdl_cache_dir="/tmp"
soap.wsdl_cache_ttl=86400
soap.wsdl_cache_limit = 5

[sysvshm]

[ldap]
ldap.max_links = -1

[mcrypt]

[dba]

zend_extension=opcache.so
[opcache]
opcache.enable= 1
opcache.enable_cli= 1
opcache.memory_consumption= 10240
opcache.max_accelerated_files= 70000
opcache.revalidate_freq= 120
opcache.validate_timestamps= 1
;opcache.file_cache=/tmp
[curl]

[openssl]

```


php-fpm
```
[www]
user = nginx
group = nginx
listen = 127.0.0.1:9000
pm = static
pm.max_children = 1000
pm.start_servers = 100
pm.min_spare_servers = 10
pm.max_spare_servers = 190
pm.max_requests = 100
```