66 lines
1.8 KiB
Lua
Executable File
66 lines
1.8 KiB
Lua
Executable File
#!/usr/bin/env sysbench
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-- This test is designed for testing MariaDB's key_cache_segments for MyISAM,
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-- and should work with other storage engines as well.
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--
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-- For details about key_cache_segments please refer to:
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-- http://kb.askmonty.org/v/segmented-key-cache
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--
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require("oltp_common")
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-- Add random_points to the list of standard OLTP options
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sysbench.option_defs.random_points =
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{"Number of random points in the IN() clause in generated SELECTs", 10}
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-- Override standard prepare/cleanup OLTP functions, as this benchmark does not
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-- support multiple tables
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oltp_prepare = prepare
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oltp_cleanup = cleanup
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function prepare()
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assert(sysbench.opt.tables == 1, "this benchmark does not support " ..
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"--tables > 1")
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oltp_prepare()
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end
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function cleanup()
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assert(sysbench.opt.tables == 1, "this benchmark does not support " ..
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"--tables > 1")
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oltp_cleanup()
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end
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function thread_init()
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drv = sysbench.sql.driver()
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con = drv:connect()
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local points = string.rep("?, ", sysbench.opt.random_points - 1) .. "?"
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stmt = con:prepare(string.format([[
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SELECT id, k, c, pad
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FROM sbtest1
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WHERE k IN (%s)
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]], points))
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params = {}
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for j = 1, sysbench.opt.random_points do
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params[j] = stmt:bind_create(sysbench.sql.type.INT)
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end
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stmt:bind_param(unpack(params))
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rlen = sysbench.opt.table_size / sysbench.opt.num_threads
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end
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function event(thread_id)
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-- To prevent overlapping of our range queries we need to partition the whole
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-- table into num_threads segments and then make each thread work with its
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-- own segment.
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for i = 1, sysbench.opt.random_points do
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local rmin = rlen * thread_id
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local rmax = rmin + rlen
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params[i]:set(sb_rand(rmin, rmax))
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end
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stmt:execute()
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end
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