XF 1.4 Please Look Over my.cnf, Getting Random White Pages

[bloop]

When I click a link on the forum (eg. thread, forum index page, member section, etc) it will usually load as expected but sometimes I''ll get a blank page or the page won't load at all and stay at the current page with nothing clickable. This started happening after I changed my.cnf, but I'm not sure what specifically is causing this problem. I had the same my.cnf on a same spec'd server except it was running nginx and it was fine. Could someone please take a look at it and tell me what could be causing it?

Server Info
E3 1271
32 GB RAM
Cpanel + Litespeed + Zend Opcache + Memcached
Mariadb 10

[mysqld]
local-infile=0
ignore-db-dir=lost+found
character-set-server=utf8
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
tmpdir=/home/mysqltmp

innodb=ON
skip-federated
skip-archive
skip-name-resolve
back_log = 75
max_connections = 300
key_buffer_size = 512M
myisam_sort_buffer_size = 32M
myisam_max_sort_file_size = 64M
join_buffer_size = 128K
read_buffer_size = 256K
sort_buffer_size = 256K
table_definition_cache = 4096
table_open_cache = 2048
thread_cache_size = 64
wait_timeout = 120
connect_timeout = 10
tmp_table_size = 64M
max_heap_table_size = 64M
max_allowed_packet = 64M
max_seeks_for_key = 1000
group_concat_max_len = 1024
max_length_for_sort_data = 1024
net_buffer_length = 16384
max_connect_errors = 100000
concurrent_insert = 2
read_rnd_buffer_size = 256K
bulk_insert_buffer_size = 8M
query_cache_limit = 512K
query_cache_size = 16M
query_cache_type = 1
query_cache_min_res_unit = 2K
query_prealloc_size = 262144
query_alloc_block_size = 65536
transaction_alloc_block_size = 8192
transaction_prealloc_size = 4096
default-storage-engine = InnoDB
thread_concurrency = 12

log_warnings=1
slow_query_log=0
long_query_time=1
slow_query_log_file=/var/lib/mysql/slowq.log
log-error=/var/log/mysqld.log

# innodb settings
innodb_large_prefix=1
innodb_purge_threads=1
innodb_file_format = Barracuda
innodb_file_per_table = 1
innodb_autoinc_lock_mode=2
innodb_doublewrite=1
innodb_open_files = 1000
innodb_data_file_path= ibdata1:10M:autoextend
innodb_buffer_pool_size = 4G
innodb_buffer_pool_instances = 4
innodb_change_buffer_max_size = 50

innodb_log_files_in_group = 2
innodb_log_file_size = 128M
innodb_log_buffer_size = 8M
innodb_flush_log_at_trx_commit = 2
innodb_thread_concurrency = 0
innodb_lock_wait_timeout=50
innodb_flush_method = O_DIRECT
innodb_support_xa=1

# 200 * # DISKS
innodb_io_capacity = 3000
innodb_read_io_threads = 64
innodb_write_io_threads = 64
innodb_flush_neighbors = 0

# mariadb settings
[mariadb]
#thread-handling = pool-of-threads
#thread-pool-size= 20
#mysql --port=3307 --protocol=tcp
#extra-port=3307
#extra-max-connections=1

userstat = 0
key_cache_segments = 1
aria_group_commit = none
aria_group_commit_interval = 0
aria_log_file_size = 32M
aria_log_purge_type = immediate
aria_pagecache_buffer_size = 8M
aria_sort_buffer_size = 8M

[mariadb-5.5]
#ignore_db_dirs=
query_cache_strip_comments=0

innodb_read_ahead = linear
innodb_adaptive_flushing_method = estimate
innodb_flush_neighbor_pages = 1
innodb_stats_update_need_lock = 0
innodb_log_block_size = 512

log_slow_filter =admin,filesort,filesort_on_disk,full_join,full_scan,query_cache,query_cache_miss,tmp_table,tmp_table_on_disk

[mysqld_safe]
socket=/var/lib/mysql/mysql.sock
log-error=/var/log/mysqld.log
open-files-limit = 163840

[mysqldump]
quick
max_allowed_packet = 32M

[myisamchk]
tmpdir=/home/mysqltmp
key_buffer = 32M
sort_buffer = 16M
read_buffer = 16M
write_buffer = 16M

[mysqlhotcopy]
interactive-timeout

[mariadb-10.0]
# 2 variables needed to switch from XtraDB to InnoDB plugins
#plugin-load=ha_innodb
#ignore_builtin_innodb

## MariaDB 10 only save and restore buffer pool pages
## warm up InnoDB buffer pool on server restarts
innodb_buffer_pool_dump_at_shutdown=1
innodb_buffer_pool_load_at_startup=1
innodb_buffer_pool_populate=0
## Disabled settings
performance_schema=OFF
innodb_stats_on_metadata=OFF
innodb_sort_buffer_size=32M
innodb_online_alter_log_max_size=128M
query_cache_strip_comments=0
log_slow_filter =admin,filesort,filesort_on_disk,full_join,full_scan,query_cache,query_cache_miss,tmp_table,tmp_table_on_disk

 

[Jake Bunce]

A blank page is often a suppressed error. Try adding this line to your library/config.php file to see if that reveals any specific error message on the blank page:

ini_set('display_errors', true);

Also check the log for related errors:

Admin CP -> Tools -> Server Error Log

 

[Abraham54]

ini_set('display_errors', true);

It does nothing - "only An unexpected database error occurred. Please try again later" is being reported.