PHP7 fpm tweak for small VPS

Env: Debian9, PHP-7.3 FPM
VPS: 1GB or 512 MB Ram

[global]
pid = run/php-fpm.pid
error_log = log/php-fpm.log
log_level = warning

emergency_restart_threshold = 30
emergency_restart_interval = 60s
process_control_timeout = 5s
daemonize = yes

;;;;;;;;;;;;;;;;;;;;
; Pool Definitions ;
;;;;;;;;;;;;;;;;;;;;

[www]
listen = /dev/shm/php-cgi.sock
listen.backlog = -1
listen.allowed_clients = 127.0.0.1
listen.owner = www
listen.group = www
listen.mode = 0666
user = www
group = www

pm = dynamic
pm.max_children = 8
pm.start_servers = 3
pm.min_spare_servers = 2
pm.max_spare_servers = 4
pm.max_requests = 1024
pm.process_idle_timeout = 10s
request_terminate_timeout = 300
request_slowlog_timeout = 0

pm.status_path = /php-fpm_status
slowlog = var/log/slow.log
rlimit_files = 51200
rlimit_core = 0

catch_workers_output = yes
;env[HOSTNAME] = de2
env[PATH] = /usr/local/bin:/usr/bin:/bin
env[TMP] = /tmp
env[TMPDIR] = /tmp
env[TEMP] = /tmp