▼テンプレート
[EC-CUBE]
4.0.4

[サーバーOS]
Linux 4.18.0-193.28.1.el8_2.x86_64 #1 SMP Thu Oct 22 00:20:22 UTC 2020 x86_64

[DBサーバー]
MySQL 8.0.21

[WEBサーバー]
Apache
※負荷分散のため、複数WEBサーバーがマウントで動いている

[PHP]
7.3.20 (Core, date, libxml, openssl, pcre, zlib, filter, hash, Reflection, SPL, session, standard, cgi-fcgi, bz2, calendar, ctype, curl, dba, dom, mbstring, fileinfo, ftp, gd, gettext, gmp, iconv, intl, json, ldap, exif, mysqlnd, odbc, PDO, pgsql, Phar, posix, shmop, SimpleXML, snmp, sockets, sqlite3, sysvmsg, sysvsem, sysvshm, tokenizer, xml, xmlwriter, xsl, mysqli, pdo_mysql, PDO_ODBC, pdo_pgsql, pdo_sqlite, wddx, xmlreader, zip, imagick)

[その他]
1日に5件受注があれば多い方、程度の稼働状況です。

[現象]
受注管理画面の対応状況一括変更の動作について、
複数件変更しようとした際に、かなり高い確率で2件目以降から30秒間隔（ほぼきっちり30秒）で処理が進む状態になってしまいます。（問題無く終わるときもある）

参考までに、5件ほど一括更新を行った時のadminのログを貼り付けます。
============
[2021-01-21 19:16:25] admin.INFO [N/A] [1b8e352] [N/A] [Eccube\Log\Logger:log:64] - INIT [] [PUT, /shop/staff/shipping/42039/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:16:25] admin.INFO [2184c513] [1b8e352] [2] [Eccube\Log\Logger:log:64] - PROCESS START ["admin_shipping_update_order_status"] [PUT, /shop/staff/shipping/42039/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:16:25] admin.INFO [2184c513] [1b8e352] [2] [Eccube\Log\Logger:log:64] - LOGIC START ["admin_shipping_update_order_status"] [PUT, /shop/staff/shipping/42039/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:16:25] admin.INFO [2184c513] [1b8e352] [2] [Eccube\Log\Logger:log:64] - 対応状況一括変更スキップ [] [PUT, /shop/staff/shipping/42039/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:16:25] admin.INFO [2184c513] [1b8e352] [2] [Eccube\Log\Logger:log:64] - LOGIC END ["admin_shipping_update_order_status"] [PUT, /shop/staff/shipping/42039/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:16:25] app.INFO [N/A] [1b8e352] [2] [Eccube\Log\Logger:log:68] - PROCESS END ["admin_shipping_update_order_status"] [PUT, /shop/staff/shipping/42039/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:16:25] admin.INFO [N/A] [101b1e0] [N/A] [Eccube\Log\Logger:log:64] - INIT [] [PUT, /shop/staff/shipping/42084/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:16:25] admin.INFO [2184c513] [101b1e0] [2] [Eccube\Log\Logger:log:64] - PROCESS START ["admin_shipping_update_order_status"] [PUT, /shop/staff/shipping/42084/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:16:26] admin.INFO [2184c513] [101b1e0] [2] [Eccube\Log\Logger:log:64] - LOGIC START ["admin_shipping_update_order_status"] [PUT, /shop/staff/shipping/42084/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:16:26] admin.INFO [2184c513] [101b1e0] [2] [Eccube\Log\Logger:log:64] - 対応状況一括変更スキップ [] [PUT, /shop/staff/shipping/42084/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:16:26] admin.INFO [2184c513] [101b1e0] [2] [Eccube\Log\Logger:log:64] - LOGIC END ["admin_shipping_update_order_status"] [PUT, /shop/staff/shipping/42084/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:16:26] app.INFO [N/A] [101b1e0] [2] [Eccube\Log\Logger:log:68] - PROCESS END ["admin_shipping_update_order_status"] [PUT, /shop/staff/shipping/42084/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:16:25] admin.INFO [N/A] [18917d2] [N/A] [Eccube\Log\Logger:log:64] - INIT [] [PUT, /shop/staff/shipping/41918/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:16:56] admin.INFO [2184c513] [18917d2] [2] [Eccube\Log\Logger:log:64] - PROCESS START ["admin_shipping_update_order_status"] [PUT, /shop/staff/shipping/41918/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:16:56] admin.INFO [2184c513] [18917d2] [2] [Eccube\Log\Logger:log:64] - LOGIC START ["admin_shipping_update_order_status"] [PUT, /shop/staff/shipping/41918/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:16:56] admin.INFO [2184c513] [18917d2] [2] [Eccube\Log\Logger:log:64] - 対応状況一括変更スキップ [] [PUT, /shop/staff/shipping/41918/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:16:56] admin.INFO [2184c513] [18917d2] [2] [Eccube\Log\Logger:log:64] - LOGIC END ["admin_shipping_update_order_status"] [PUT, /shop/staff/shipping/41918/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:16:56] app.INFO [N/A] [18917d2] [2] [Eccube\Log\Logger:log:68] - PROCESS END ["admin_shipping_update_order_status"] [PUT, /shop/staff/shipping/41918/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:16:25] admin.INFO [N/A] [df7071b] [N/A] [Eccube\Log\Logger:log:64] - INIT [] [PUT, /shop/staff/shipping/42043/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:17:26] admin.INFO [2184c513] [df7071b] [2] [Eccube\Log\Logger:log:64] - PROCESS START ["admin_shipping_update_order_status"] [PUT, /shop/staff/shipping/42043/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:17:26] admin.INFO [2184c513] [df7071b] [2] [Eccube\Log\Logger:log:64] - LOGIC START ["admin_shipping_update_order_status"] [PUT, /shop/staff/shipping/42043/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:17:26] admin.INFO [2184c513] [df7071b] [2] [Eccube\Log\Logger:log:64] - 対応状況一括変更スキップ [] [PUT, /shop/staff/shipping/42043/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:17:26] admin.INFO [2184c513] [df7071b] [2] [Eccube\Log\Logger:log:64] - LOGIC END ["admin_shipping_update_order_status"] [PUT, /shop/staff/shipping/42043/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:17:26] app.INFO [N/A] [df7071b] [2] [Eccube\Log\Logger:log:68] - PROCESS END ["admin_shipping_update_order_status"] [PUT, /shop/staff/shipping/42043/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:16:25] admin.INFO [N/A] [ce62b4d] [N/A] [Eccube\Log\Logger:log:64] - INIT [] [PUT, /shop/staff/shipping/42037/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:17:56] admin.INFO [2184c513] [ce62b4d] [2] [Eccube\Log\Logger:log:64] - PROCESS START ["admin_shipping_update_order_status"] [PUT, /shop/staff/shipping/42037/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:17:56] admin.INFO [2184c513] [ce62b4d] [2] [Eccube\Log\Logger:log:64] - LOGIC START ["admin_shipping_update_order_status"] [PUT, /shop/staff/shipping/42037/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:17:56] admin.INFO [2184c513] [ce62b4d] [2] [Eccube\Log\Logger:log:64] - 対応状況一括変更スキップ [] [PUT, /shop/staff/shipping/42037/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:17:56] admin.INFO [2184c513] [ce62b4d] [2] [Eccube\Log\Logger:log:64] - LOGIC END ["admin_shipping_update_order_status"] [PUT, /shop/staff/shipping/42037/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]
[2021-01-21 19:17:56] app.INFO [N/A] [ce62b4d] [2] [Eccube\Log\Logger:log:68] - PROCESS END ["admin_shipping_update_order_status"] [PUT, /shop/staff/shipping/42037/order_status, 218.45.230.138, https://funky802.com/shop/staff/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36]

============
・[PROCESS START]から[PROCESS END]までは、1秒もかかっていないことがわかります。（「対応状況一括変更スキップ」）になっているのは、同じステータスを指定している為）
・３件目から、[PROCESS START]が30秒たってから記載されているのがわかるかと思います。

こちら原因としては、何が考えられるか、どのあたりを調査すればわかるのか、お知恵ございましたらお借りしたい次第です。