Help me sir

[Adeniran Adefemi]

Good day sir/ma,
I used pgfplots (tikzpicture) in my latex+pdf to produce many graphs for my thesis, suddenly I encountered?

"Text Capacity exceeded, sorry (main memory size=300000)"

Please help me on what to do to increase memory capacity so that I will be able to plot more graphs and conclude the work.
What should I add to the preamble??

Thank you very much for your quick response in anticipation.
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