Is there any news on this issue? We have a three node cluster, and invariably after a few days to a week, we end up with a bunch of gcache.page.XXX files being created. The cluster itself is fine. I end up shutting down the node with the files (whichis the one getting all the writes), manually delete them, and start it back up.
-rw-------. 1 mysql mysql 134219048 Dec 11 18:27 galera.cache
-rw------- 1 mysql mysql 134217728 Dec 12 12:26 gcache.page.000000
-rw------- 1 mysql mysql 134217728 Dec 13 12:27 gcache.page.000001
-rw------- 1 mysql mysql 134217728 Dec 14 10:27 gcache.page.000002
-rw------- 1 mysql mysql 134217728 Dec 14 12:54 gcache.page.000003
-rw------- 1 mysql mysql 134217728 Dec 14 14:34 gcache.page.000004
-rw------- 1 mysql mysql 134217728 Dec 14 15:56 gcache.page.000005
-rw------- 1 mysql mysql 134217728 Dec 14 18:59 gcache.page.000006
-rw------- 1 mysql mysql 134217728 Dec 15 10:41 gcache.page.000007
-rw------- 1 mysql mysql 134217728 Dec 15 12:31 gcache.page.000008
-rw------- 1 mysql mysql 134217728 Dec 15 15:11 gcache.page.000009
-rw-rw---- 1 mysql mysql 133 Dec 10 19:32 GRA_9_888385.log
-rw-rw----. 1 mysql mysql 108 Dec 15 00:30 grastate.dat
-rw-rw---- 1 mysql mysql 265 Dec 3 20:24 gvwstate.dat
[root@host src]# rpm -qa | grep -i percona
Percona-XtraDB-Cluster-56-5.6.26-25.12.1.el7.x86_64
Percona-XtraDB-Cluster-shared-56-5.6.26-25.12.1.el7.x86_64
percona-xtrabackup-2.3.2-1.el7.x86_64
Percona-XtraDB-Cluster-client-56-5.6.26-25.12.1.el7.x86_64
Percona-XtraDB-Cluster-galera-3-3.12.2-1.rhel7.x86_64
Percona-XtraDB-Cluster-server-56-5.6.26-25.12.1.el7.x86_64
[root@host src]# cat /etc/my.cnf
[client]
default-character-set = utf8mb4
socket = /x/mysql/mysql.sock
[mysql]
default-character-set = utf8mb4
[mysqld]
port = 3306
socket = /x/mysql/mysql.sock
datadir = /x/mysql
character-set-client-handshake = FALSE
character-set-server = utf8mb4
collation-server = utf8mb4_unicode_ci
max_connections = 1000
log_bin = mysql-bin
expire_logs_days = 3
binlog_format = ROW
default_storage_engine = innodb
innodb_buffer_pool_size = 5G
innodb_flush_log_at_trx_commit = 0
innodb_flush_method = O_DIRECT
innodb_log_files_in_group = 2
innodb_log_file_size = 20M
innodb_file_per_table = 1
innodb_large_prefix = true
innodb_file_format = Barracuda
innodb_autoinc_lock_mode = 2
wsrep_cluster_address = gcomm://x.x.x.138,x.x.x.139,x.x.x.140
wsrep_node_address = x.x.x.138
wsrep_provider = /usr/lib64/galera3/libgalera_smm.so
wsrep_sst_method = xtrabackup-v2
wsrep_sst_auth = "x:x"
wsrep_sst_receive_address = x.x.x.138:14444
wsrep_slave_threads = 8
wsrep_cluster_name = xx
wsrep_node_name = xxx
wsrep_provider_options="gcache.keep_pages_count=4"
[mysqld_safe]
pid-file = /run/mysqld/mysql.pid