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The ZFS ARC is a subject if automatic scaling in any system using ZFS. ARC limiting is only a workaround; the behavior you’re experiencing was pretty much usual for FreeBSD older than 11.x (however, I personally haven’t seen any crashes -only ineffective memory usage); after 11.0 release this behavior was massively mitigated (thus, if you’re using 10.x or ...


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Rate Per Second=RPS - Suggestions to consider for your my.cnf [mysqld] section innodb_io_capacity=1800 # from 200 to allow higher IOPS read_rnd_buffer_size=256K # from 4M to reduce handler_read_rnd_next RPS of 2560 query_cache_size=0 # from 1M to conserve RAM and QC is OFF already innodb_lru_scan_depth=100 # from 1024 to conserve CPU cycles every SECOND ...


Analysis... Observations: Version: 5.6.43-log 8 GB of RAM Uptime = 14d 21:34:59 You are not running on Windows. Running 64-bit version You appear to be running entirely (or mostly) InnoDB. The More Important Issues: Alas, nothing jumped out as the answer to your swapping problem. Anyway, here's my comments: Set long_query_time=1 and turn on the slowlog....


ezjail covers the use-case you described. To answer your question: How you deal with rolling upgrades? Let me quote from FreeBSD Handbook 14.6.2. Initial Setup: To Populate the Jail with installworld The basejail can be installed from binaries created by buildworld on the host with ezjail-admin update ... installworld is executed, installing the host'...


Both of the comments to your post are on the right track. Here is a more fully fledged response. (TL;DR at bottom) As root, start by making a safety copy of your /etc/mail directory: # cd /etc # cp -Rp mail For the purposes of this example, I'm going to assume that you have no customizations to your email configuration, and in fact, we'll ...

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