reordered what should be added...


The following based on XtraDB-5.5.8.
Are they enough?

"Innodb_" is omitted.

BACKGROUND THREAD############
ulint
master_thread_1_second_loops            srv_main_1_second_loops
master_thread_sleeps                    srv_main_sleeps
master_thread_10_second_loops           srv_main_10_second_loops
master_thread_background_loops          srv_main_background_loops
master_thread_main_flush_loops          srv_main_flush_loops
background_log_sync                     srv_log_writes_and_flush

SEMAPHORES###################
ib_int64_t
mutex_spin_waits        mutex_spin_wait_count
mutex_spin_rounds       mutex_spin_round_count
mutex_os_waits          mutex_os_wait_count
s_lock_spin_waits       rw_s_spin_wait_count
s_lock_spin_rounds      rw_s_spin_round_count
s_lock_os_waits         rw_s_os_wait_count
x_lock_spin_waits       rw_x_spin_wait_count
x_lock_spin_rounds      rw_x_spin_round_count
x_lock_os_waits         rw_x_os_wait_count

INSERT BUFFER AND ADAPTIVE HASH INDEX##########
ulint
ibuf_size                       ibuf->size
ibuf_free_list                  ibuf->free_list_len
ibuf_segment_size               ibuf->seg_size
ibuf_merges                     ibuf->n_merges
ibuf_merged_inserts             ibuf->n_merged_ops[IBUF_OP_INSERT]
ibuf_merged_delete_marks        ibuf->n_merged_ops[IBUF_OP_DELETE_MARK]
ibuf_merged_deletes             ibuf->n_merged_ops[IBUF_OP_DELETE]
ibuf_discarded_inserts          ibuf->n_discarded_ops[IBUF_OP_INSERT]
ibuf_discarded_delete_marks     ibuf->n_discarded_ops[IBUF_OP_DELETE_MARK]
ibuf_discarded_deletes          ibuf->n_discarded_ops[IBUF_OP_DELETE]


        [summed (i = 0; i < btr_search_index_num; i++)]
        hash_table_t*   table = btr_search_get_hash_index((index_id_t)i);
adaptive_hash_cells             += hash_get_n_cells(table)
adaptive_hash_heap_buffers      += (UT_LIST_GET_LEN(table->heap->base) - 1)


adaptive_hash_hash_searches     btr_cur_n_sea
adaptive_hash_non_hash_searches btr_cur_n_non_sea


LOG############################
ib_uint64_t
lsn_current             log_sys->lsn
lsn_flushed             log_sys->flushed_to_disk_lsn
lsn_last_checkpoint     log_sys->last_checkpoint_lsn

ulint
checkpoint_max_age      log_sys->max_checkpoint_age
checkpoint_target_age   log_max_checkpoint_age_async()

###checkpoint_modified_age "dangerous without mutex": impossible not to affect performance much

checkpoint_age          (log_sys->lsn - log_sys->last_checkpoint_lsn)


BUFFER POOL AND MEMORY###############
innodb_mem_total        ut_total_allocated_memory
innodb_mem_adaptive_hash
        if (btr_search_sys && btr_search_sys->hash_index[0]->heap) {
                btr_search_sys_subtotal = mem_heap_get_size(btr_search_sys->hash_index[0]->heap);
        } else {
                btr_search_sys_subtotal = 0;
                for (i=0; i < btr_search_sys->hash_index[0]->n_mutexes; i++) {
                        btr_search_sys_subtotal += mem_heap_get_size(btr_search_sys->hash_index[0]->heaps[i]);
                }
        }
        btr_search_sys_subtotal *= btr_search_index_num;
        += (btr_search_sys
            ? (btr_search_sys->hash_index[0]->n_cells * btr_search_index_num * sizeof(hash_cell_t)) : 0)

innodb_mem_dictionary
        (dict_sys ? ((dict_sys->table_hash->n_cells
                        + dict_sys->table_id_hash->n_cells
                        ) * sizeof(hash_cell_t)
                + dict_sys->size) : 0)


        for (i = 0; i < srv_buf_pool_instances; i++) {
        buf_pool_t*     buf_pool = buf_pool_from_array(i);
buffer_pool_pages_old           += buf_pool->LRU_old_len

buffer_pool_pages_made_young                    stat.n_pages_made_young
buffer_pool_pages_made_not_young                stat.n_pages_not_made_young
buffer_pool_pages_read_ahead                    !!! already exist "buffer_pool_read_ahead"
buffer_pool_pages_evicted_without_access        !!! already exist "buffer_pool_read_ahead_evicted"


TRANSACTIONS###########################
ib_uint64_t
max_trx_id              trx_sys->max_trx_id
purge_trx_id            purge_sys->purge_trx_no
purge_undo_no           purge_sys->purge_undo_no

ulint
history_list_length     trx_sys->rseg_history_len


ETC########################
lock_numbers                    lock_sys->rec_num    ####should be added to count####
oldest_view_low_limit_trx_id    read_view_t*    view = UT_LIST_GET_LAST(trx_sys->view_list);
                                view
                                ? view->low_limit_id
                                : 0