Redis server seems to fail periodically

I’m finding that for the most part this is an excellent plugin that helps reduce the load on my database instance but at least once a day I’ll have the site go down for a few minutes with the following error in the logs.

[Wed Jul 20 23:05:08.524159 2022] [php7:notice] [pid 2902] [client 3.105.214.130:0] RedisException: Connection refused in /var/www/zerotackle.com/public_html/wp-content/object-cache.php:685\nStack trace:\n#0 /var/www/zerotackle.com/public_html/wp-content/object-cache.php(685): Redis->connect('127.0.0.1', 6379, 1, '', 0, 1)\n#1 /var/www/zerotackle.com/public_html/wp-content/object-cache.php(502): WP_Object_Cache->connect_using_phpredis(Array)\n#2 /var/www/zerotackle.com/public_html/wp-content/object-cache.php(220): WP_Object_Cache->__construct(true)\n#3 /var/www/zerotackle.com/public_html/wp-includes/load.php(729): wp_cache_init()\n#4 /var/www/zerotackle.com/public_html/wp-settings.php(131): wp_start_object_cache()\n#5 /var/www/zerotackle.com/public_html/wp-config.php(136): require_once('/var/www/zerota...')\n#6 /var/www/zerotackle.com/public_html/wp-load.php(50): require_once('/var/www/zerota...')\n#7 /var/www/zerotackle.com/public_html/wp-blog-header.php(13): require_once('/var/www/zerota...')\n#8 /var/www/zerotackle.com/public_html/index.php(17): require('/var/www/zerota...')\n#9 {main}, referer: https://www.zerotackle.com/

Is there a setup step or config setting I should be using to help prevent this?

Also, just generally, what is an appropriate size to allocate for Redis on a server instance that has 16GB of memory.

Status: Connected
Client: PhpRedis (v5.2.1)
Drop-in: Valid
Disabled: No
Ping: 1
Errors: []
PhpRedis: 5.2.1
Relay: Not loaded
Predis: Not loaded
Credis: Not loaded
PHP Version: 7.4.30
Plugin Version: 2.1.6
Redis Version: 7.0.0
Multisite: No
Metrics: Enabled
Metrics recorded: 1255
Filesystem: Working
Global Prefix: "wp_"
Blog Prefix: "wp_"
WP_REDIS_DATABASE: 0
WP_REDIS_TIMEOUT: 1
WP_REDIS_READ_TIMEOUT: 1
WP_REDIS_MAXTTL: 3600
WP_REDIS_PREFIX: "www.zerotackle.com"
WP_CACHE_KEY_SALT: "www.zerotackle.com"
Global Groups: [
    "blog-details",
    "blog-id-cache",
    "blog-lookup",
    "global-posts",
    "networks",
    "rss",
    "sites",
    "site-details",
    "site-lookup",
    "site-options",
    "site-transient",
    "users",
    "useremail",
    "userlogins",
    "usermeta",
    "user_meta",
    "userslugs",
    "redis-cache",
    "blog_meta"
]
Ignored Groups: [
    "counts",
    "plugins",
    "themes",
    "wordfence",
    "wordfence-ls"
]
Unflushable Groups: []
Groups Types: {
    "blog-details": "global",
    "blog-id-cache": "global",
    "blog-lookup": "global",
    "global-posts": "global",
    "networks": "global",
    "rss": "global",
    "sites": "global",
    "site-details": "global",
    "site-lookup": "global",
    "site-options": "global",
    "site-transient": "global",
    "users": "global",
    "useremail": "global",
    "userlogins": "global",
    "usermeta": "global",
    "user_meta": "global",
    "userslugs": "global",
    "redis-cache": "global",
    "counts": "ignored",
    "plugins": "ignored",
    "themes": "ignored",
    "blog_meta": "global",
    "wordfence": "ignored",
    "wordfence-ls": "ignored"
}
Drop-ins: [
    "advanced-cache.php v by ",
    "Redis Object Cache Drop-In v2.1.6 by Till Krüss"
]

• This topic was modified 2 years, 8 months ago by DFC005.

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