mv old_history .history

wc -l .history
43562 .history

wc -l .history
32234 .history

HISTFILE="$HOME/.zsh_history"
HISTSIZE=10000000
SAVEHIST=10000000
setopt BANG_HIST                 # Treat the '!' character specially during expansion.
setopt EXTENDED_HISTORY          # Write the history file in the ":start:elapsed;command" format.
setopt INC_APPEND_HISTORY        # Write to the history file immediately, not when the shell exits.
setopt SHARE_HISTORY             # Share history between all sessions.
setopt HIST_EXPIRE_DUPS_FIRST    # Expire duplicate entries first when trimming history.
setopt HIST_IGNORE_DUPS          # Don't record an entry that was just recorded again.
setopt HIST_IGNORE_ALL_DUPS      # Delete old recorded entry if new entry is a duplicate.
setopt HIST_FIND_NO_DUPS         # Do not display a line previously found.
setopt HIST_IGNORE_SPACE         # Don't record an entry starting with a space.
setopt HIST_SAVE_NO_DUPS         # Don't write duplicate entries in the history file.
setopt HIST_REDUCE_BLANKS        # Remove superfluous blanks before recording entry.
setopt HIST_VERIFY               # Don't execute immediately upon history expansion.
setopt HIST_BEEP                 # Beep when accessing nonexistent history.

export HISTSIZE=2000
export HISTFILE="$HOME/.history"

export SAVEHIST=$HISTSIZE

setopt hist_ignore_all_dups

setopt hist_ignore_space

HISTFILE=~/.zsh_history
HISTSIZE=999999999
SAVEHIST=$HISTSIZE

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