42 lines
1.4 KiB
C++
42 lines
1.4 KiB
C++
/*
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* Copyright (c) 2019 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
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*
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* Change Date: 2024-11-16
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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#include "performance.hh"
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std::string show_some(const std::string& str, int nchars)
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{
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int sz = str.length();
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if (sz > nchars)
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{
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return str.substr(0, nchars) + "...";
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}
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else
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{
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return str;
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}
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}
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// These are TODOs for the GA version. The Beta version will not have persistence.
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// 1. Read the file once at startup. There might also be a need to do cleanup
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// of the file if the configuration has changed.
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// 2. Updates to the data should "quickly" become globally available,
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// rather than be written after every change.
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// 3. Writing the file back should go through something like of lockless queue,
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// that triggers a write, possibly when there is less load on the system.
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// 4. Every now and then some form of re-learn, maybe just dropping entries after
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// some expiration time.
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// 5. If a host goes away (even for maintenance) entries associated with it should
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// probably be dropped immediately.
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// 6. Save all data at shutdown.
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// Start using xxhash
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