Right!
Error.log file in the root says this since I clicked my database update. The time stamp on it is about 45mins after I clicked on updated database:
[16-Aug-2016 13:09:21 UTC] WordPress database error Duplicate key name 'download_order_key_product' for query ALTER TABLE wp_woocommerce_downloadable_product_permissions ADD KEY download_order_key_product (product_id,order_id,order_key(191),download_id) made by require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, WC_Install::check_version, WC_Install::install, WC_Install::create_tables, dbDelta
[16-Aug-2016 13:09:21 UTC] WordPress database error Duplicate key name 'meta_key' for query ALTER TABLE wp_woocommerce_order_itemmeta ADD KEY meta_key (meta_key(191)) made by require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, WC_Install::check_version, WC_Install::install, WC_Install::create_tables, dbDelta
[16-Aug-2016 13:09:21 UTC] WordPress database error Duplicate key name 'tax_rate_country' for query ALTER TABLE wp_woocommerce_tax_rates ADD KEY tax_rate_country (tax_rate_country(191)) made by require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, WC_Install::check_version, WC_Install::install, WC_Install::create_tables, dbDelta
[16-Aug-2016 13:09:21 UTC] WordPress database error Duplicate key name 'tax_rate_state' for query ALTER TABLE wp_woocommerce_tax_rates ADD KEY tax_rate_state (tax_rate_state(191)) made by require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, WC_Install::check_version, WC_Install::install, WC_Install::create_tables, dbDelta
[16-Aug-2016 13:09:21 UTC] WordPress database error Duplicate key name 'tax_rate_class' for query ALTER TABLE wp_woocommerce_tax_rates ADD KEY tax_rate_class (tax_rate_class(191)) made by require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, WC_Install::check_version, WC_Install::install, WC_Install::create_tables, dbDelta
[16-Aug-2016 13:09:21 UTC] WordPress database error Duplicate key name 'location_type_code' for query ALTER TABLE wp_woocommerce_tax_rate_locations ADD KEY location_type_code (location_type(40),location_code(90)) made by require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, WC_Install::check_version, WC_Install::install, WC_Install::create_tables, dbDelta
[16-Aug-2016 13:09:21 UTC] WordPress database error Duplicate key name 'location_type_code' for query ALTER TABLE wp_woocommerce_shipping_zone_locations ADD KEY location_type_code (location_type(40),location_code(90)) made by require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, WC_Install::check_version, WC_Install::install, WC_Install::create_tables, dbDelta
[16-Aug-2016 13:09:26 UTC] WordPress database error Duplicate key name 'attribute_name' for query ALTER TABLE wp_woocommerce_attribute_taxonomies ADD KEY attribute_name (attribute_name(191)) made by require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, WC_Install::check_version, WC_Install::install, WC_Install::create_tables, dbDelta
[16-Aug-2016 13:09:26 UTC] WordPress database error Duplicate key name 'download_order_key_product' for query ALTER TABLE wp_woocommerce_downloadable_product_permissions ADD KEY download_order_key_product (product_id,order_id,order_key(191),download_id) made by require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, WC_Install::check_version, WC_Install::install, WC_Install::create_tables, dbDelta
[16-Aug-2016 13:09:26 UTC] WordPress database error Duplicate key name 'meta_key' for query ALTER TABLE wp_woocommerce_order_itemmeta ADD KEY meta_key (meta_key(191)) made by require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, WC_Install::check_version, WC_Install::install, WC_Install::create_tables, dbDelta
[16-Aug-2016 13:09:26 UTC] WordPress database error Duplicate key name 'tax_rate_country' for query ALTER TABLE wp_woocommerce_tax_rates ADD KEY tax_rate_country (tax_rate_country(191)) made by require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, WC_Install::check_version, WC_Install::install, WC_Install::create_tables, dbDelta
[16-Aug-2016 13:09:26 UTC] WordPress database error Duplicate key name 'tax_rate_state' for query ALTER TABLE wp_woocommerce_tax_rates ADD KEY tax_rate_state (tax_rate_state(191)) made by require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, WC_Install::check_version, WC_Install::install, WC_Install::create_tables, dbDelta
[16-Aug-2016 13:09:26 UTC] WordPress database error Duplicate key name 'tax_rate_class' for query ALTER TABLE wp_woocommerce_tax_rates ADD KEY tax_rate_class (tax_rate_class(191)) made by require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, WC_Install::check_version, WC_Install::install, WC_Install::create_tables, dbDelta
[16-Aug-2016 13:09:26 UTC] WordPress database error Duplicate key name 'location_type_code' for query ALTER TABLE wp_woocommerce_tax_rate_locations ADD KEY location_type_code (location_type(40),location_code(90)) made by require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, WC_Install::check_version, WC_Install::install, WC_Install::create_tables, dbDelta
[16-Aug-2016 13:09:26 UTC] WordPress database error Duplicate key name 'location_type_code' for query ALTER TABLE wp_woocommerce_shipping_zone_locations ADD KEY location_type_code (location_type(40),location_code(90)) made by require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, WC_Install::check_version, WC_Install::install, WC_Install::create_tables, dbDelta
[16-Aug-2016 13:09:32 UTC] WordPress database error Duplicate key name 'attribute_name' for query ALTER TABLE wp_woocommerce_attribute_taxonomies ADD KEY attribute_name (attribute_name(191)) made by require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, WC_Install::check_version, WC_Install::install, WC_Install::create_tables, dbDelta
[16-Aug-2016 13:09:32 UTC] WordPress database error Duplicate key name 'download_order_key_product' for query ALTER TABLE wp_woocommerce_downloadable_product_permissions ADD KEY download_order_key_product (product_id,order_id,order_key(191),download_id) made by require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, WC_Install::check_version, WC_Install::install, WC_Install::create_tables, dbDelta
[16-Aug-2016 13:09:32 UTC] WordPress database error Duplicate key name 'meta_key' for query ALTER TABLE wp_woocommerce_order_itemmeta ADD KEY meta_key (meta_key(191)) made by require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, WC_Install::check_version, WC_Install::install, WC_Install::create_tables, dbDelta
[16-Aug-2016 13:09:32 UTC] WordPress database error Duplicate key name 'tax_rate_country' for query ALTER TABLE wp_woocommerce_tax_rates ADD KEY tax_rate_country (tax_rate_country(191)) made by require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, WC_Install::check_version, WC_Install::install, WC_Install::create_tables, dbDelta
[16-Aug-2016 13:09:32 UTC] WordPress database error Duplicate key name 'tax_rate_state' for query ALTER TABLE wp_woocommerce_tax_rates ADD KEY tax_rate_state (tax_rate_state(191)) made by require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, WC_Install::check_version, WC_Install::install, WC_Install::create_tables, dbDelta
[16-Aug-2016 13:09:32 UTC] WordPress database error Duplicate key name 'tax_rate_class' for query ALTER TABLE wp_woocommerce_tax_rates ADD KEY tax_rate_class (tax_rate_class(191)) made by require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, WC_Install::check_version, WC_Install::install, WC_Install::create_tables, dbDelta
[16-Aug-2016 13:09:32 UTC] WordPress database error Duplicate key name 'location_type_code' for query ALTER TABLE wp_woocommerce_tax_rate_locations ADD KEY location_type_code (location_type(40),location_code(90)) made by require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, WC_Install::check_version, WC_Install::install, WC_Install::create_tables, dbDelta
[16-Aug-2016 13:09:32 UTC] WordPress database error Duplicate key name 'location_type_code' for query ALTER TABLE wp_woocommerce_shipping_zone_locations ADD KEY location_type_code (location_type(40),location_code(90)) made by require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, WC_Install::check_version, WC_Install::install, WC_Install::create_tables, dbDelta
The above string Mike suggested has not been written to the error.log file nor has it shown up in the wc_db_updates-***.log
08-16-2016 @ 13:31:29 - Queuing 2.6.0 - wc_update_260_options
08-16-2016 @ 13:31:29 - Queuing 2.6.0 - wc_update_260_termmeta
08-16-2016 @ 13:31:29 - Queuing 2.6.0 - wc_update_260_zones
08-16-2016 @ 13:31:29 - Queuing 2.6.0 - wc_update_260_zone_methods
08-16-2016 @ 13:31:29 - Queuing 2.6.0 - wc_update_260_refunds
08-16-2016 @ 13:31:29 - Queuing 2.6.0 - wc_update_260_db_version
08-16-2016 @ 13:31:30 - Unable to dispatch WooCommerce updater: Operation timed out after 1000 milliseconds with 0 bytes received
08-16-2016 @ 13:31:30 - Running wc_update_260_options callback
08-16-2016 @ 13:31:30 - Finished wc_update_260_options callback
08-16-2016 @ 13:31:30 - Running wc_update_260_termmeta callback
08-16-2016 @ 13:31:30 - Finished wc_update_260_termmeta callback
08-16-2016 @ 13:31:30 - Running wc_update_260_zones callback
08-16-2016 @ 13:31:30 - Finished wc_update_260_zones callback
08-16-2016 @ 13:31:30 - Running wc_update_260_zone_methods callback
08-16-2016 @ 13:31:30 - Finished wc_update_260_zone_methods callback
08-16-2016 @ 13:31:30 - Running wc_update_260_refunds callback
08-16-2016 @ 13:31:30 - Finished wc_update_260_refunds callback
08-16-2016 @ 13:31:30 - Running wc_update_260_db_version callback
08-16-2016 @ 13:31:30 - Finished wc_update_260_db_version callback
08-16-2016 @ 13:31:30 - Data update complete
I will install the debug bar plug in later on.