Why doesn't Apache see changes in files (not PHP files)?

Question

linux

Good afternoon. I will try to describe the conditions of the problem in as much detail as possible.
There is a machine running licensed Windows 8.1
. VirtualBox 4.3.26 is installed on it
. VirtualBox has a console version of Opensuse 13.2 with a raised LAMP server
. Opensuse has a /srv/www/htdocs/ folder that Apache2 looks into.
There are several virtual hosts:
/srv/www/ htdocs/vhosts/host1
/srv/www/htdocs/vhosts/host2
/srv/www/htdocs/vhosts/host3
VirtualBox has a static IP address and in the hosts file on windows there are virtual hosts host1, host2, host3 referring to the VirtualBox IP
In the virtual the shared folder D:\\vhosts\ has been added to the machine,
inside which are the host1, host2, host3 folders
the shared folder is connected to the folder /srv/www/htdocs/vhosts/
thus folders from windows are replaced by folders from Linux
/srv/www/htdocs/vhosts/host1 is replaced by the contents of D:\\vhosts\host1\
/srv/www/htdocs/ vhosts/host2 is replaced with the content D:\\vhosts\host2\
/srv/www/htdocs/vhosts/host3 is replaced with the content D:\\vhosts\host3\
Thus, we get that the Lamp server running under OpenSuse accesses files when accessing virtual hosts on Windows.
All folders and files have permissions 777 and the virtual host works fine with files
Now the crux of the problem.
If on the web server (from under Windows) you change any text file, such as CSS or JS, then if you open this file through the vi editor on opensuse, there will be changes, and if you open this file in the browser through apache, then there will be no changes. I say right away that the problem is not in the cache, because even if you clear it or go incognito, everything is the same. As a result, no matter how we change the file, OpenSuse itself sees the changes in the file, but Apache does not see (does not apply to PHP files) if:
do umount /srv/www/htdocs/vhosts/ and mount it again
or
open the file via vi modify it under linux and save
or
open the file via vi do not modify but exit with :wq
or
rename the file, try to load it through the browser, get an error and then rename it back,
then the file is loaded updated, but if you change it again, then all the dances are repeated again.
I broke my whole head what it could be and to be honest I have no idea how to fix it.
In general, in the end I decided to turn to the Internet minds.

apache2ctl -M
Conclusion:

Loaded Modules:
 core_module (static)
 access_compat_module (static)
 so_module (static)
 http_module (static)
 mpm_prefork_module (static)
 unixd_module (static)
 systemd_module (static)
 authz_host_module (shared)
 actions_module (shared)
 alias_module (shared)
 auth_basic_module (shared)
 authz_user_module (shared)
 authn_file_module (shared)
 authz_groupfile_module (shared)
 autoindex_module (shared)
 cgi_module (shared)
 dir_module (shared)
 include_module (shared)
 log_config_module (shared)
 mime_module (shared)
 negotiation_module (shared)
 setenvif_module (shared)
 status_module (shared)
 userdir_module (shared)
 asis_module (shared)
 rewrite_module (shared)
 php5_module (shared)
 authn_core_module (shared)
 reqtimeout_module (shared)
 authz_core_module (shared)
 socache_shmcb_module (shared)

if you download a file in Linux itself via wget, then it will also be unchanged, but strange characters will appear at the end of the file:
if you open it via vi, then there will be ^@^@^@^@
if via notepad++ then some zeros

here are all the services on my machine

after-local.service                loaded active exited  /etc/init.d/after.local Compatibility
apache2.service                    loaded active running The Apache Webserver
cron.service                       loaded active running Command Scheduler
dbus.service                       loaded active running D-Bus System Message Bus
dm-event.service                   loaded active running Device-mapper event daemon
[email protected]                 loaded active running Getty on tty1
haveged.service                    loaded active running Entropy Daemon based on the HAVEGE algorithm
kmod-static-nodes.service          loaded active exited  Create list of required static device nodes for the current kernel
lvm2-lvmetad.service               loaded active running LVM2 metadata daemon
mysql.service                      loaded active running MySQL server
nscd.service                       loaded active running Name Service Cache Daemon
ntpd.service                       loaded active running NTP Server Daemon
postfix.service                    loaded active running Postfix Mail Transport Agent
rc-local.service                   loaded active exited  /etc/init.d/boot.local Compatibility
sshd.service                       loaded active running OpenSSH Daemon
SuSEfirewall2.service              loaded active exited  SuSEfirewall2 phase 2
SuSEfirewall2_init.service         loaded active exited  SuSEfirewall2 phase 1
systemd-journald.service           loaded active running Journal Service
systemd-logind.service             loaded active running Login Service
systemd-modules-load.service       loaded active exited  Load Kernel Modules
systemd-random-seed.service        loaded active exited  Load/Save Random Seed
systemd-remount-fs.service         loaded active exited  Remount Root and Kernel File Systems
systemd-sysctl.service             loaded active exited  Apply Kernel Variables
systemd-tmpfiles-setup-dev.service loaded active exited  Create static device nodes in /dev
systemd-tmpfiles-setup.service     loaded active exited  Create Volatile Files and Directories
systemd-udev-root-symlink.service  loaded active exited  Rule generator for /dev/root symlink
systemd-udev-settle.service        loaded active exited  udev Wait for Complete Device Initialization
systemd-udev-trigger.service       loaded active exited  udev Coldplug all Devices
systemd-udevd.service              loaded active running udev Kernel Device Manager
systemd-update-utmp.service        loaded active exited  Update UTMP about System Reboot/Shutdown
systemd-user-sessions.service      loaded active exited  Permit User Sessions
systemd-vconsole-setup.service     loaded active exited  Setup Virtual Console
[email protected]                     loaded active running User Manager for UID 0
vboxadd.service                    loaded active exited  LSB: VirtualBox Linux Additions kernel modules
wicked.service                     loaded active exited  wicked managed network interfaces
wickedd-auto4.service              loaded active running wicked AutoIPv4 supplicant service
wickedd-dhcp4.service              loaded active running wicked DHCPv4 supplicant service
wickedd-dhcp6.service              loaded active running wicked DHCPv6 supplicant service
wickedd-nanny.service              loaded active running wicked network nanny service
wickedd.service                    loaded active running wicked network management service daemon

It is worth noting that if changes are made in the PHP file, and no matter what, you can simply write pure html, then they are immediately displayed without problems.
In addition, if the file size is less than ~ 260 bytes, then all changes are also instantly passed. If the file is larger than this size then problems are returned.
Another funny fact is that if you make a file less than 260 bytes (by deleting lines) and change it, then, as mentioned above, the changes will appear immediately, but if you return lines after the change or add others, then the old file comes to the browser before any changes.

Answer 1

xcache, opcache, memcache installed?