MELVYL PSYCINFO DATABASE TELNET STATISTICS
Time period: 05/01/99 through 05/31/99
1.0 SUMMARY STATISTICS
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1.1 Total sessions:
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Zero results may indicate no access to the database
Location Library Remote Total
________ _______ ______ _____
Berkeley 735 1,263 1,998
Davis 1,511 76 1,587
Irvine 1,545 0 1,545
Los Angeles 1,178 2,074 3,252
Riverside 1,024 291 1,315
San Diego 78 756 834
San Francisco 557 26 583
Santa Barbara 714 826 1,540
Santa Cruz 1,157 403 1,560
Lawrence Berkeley 0 0 0
Lawrence Livermore 0 0 0
Los Alamos 0 0 0
Other - UC 8 225 233
Other-Network UC n/a 931 931
_______ ______ _____
8,507 6,871 15,378
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 244 1,333 11,614
2-4 a.m. 94 541 6,745
4-6 a.m. 49 184 1,501
6-8 a.m. 174 682 7,167
8-10 a.m. 1,112 3,911 39,846
10-12 a.m. 2,411 10,105 114,460
12-2 p.m. 2,903 12,993 136,031
2-4 p.m. 3,303 14,444 158,946
4-6 p.m. 2,307 10,076 112,006
6-8 p.m. 1,223 5,856 64,995
8-10 p.m. 959 4,969 52,795
10-12 p.m. 599 2,990 29,423
__________ __________ __________ _________________
Total: 15,378 68,084 735,529
1.2 FIND commands
__________________
Zero results may indicate no access to the database
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 3,438 4,965 8,403
Davis 5,787 236 6,023
Irvine 7,336 0 7,336
Los Angeles 5,812 8,985 14,797
Riverside 5,419 1,219 6,638
San Diego 253 2,791 3,044
San Francisco 1,953 174 2,127
Santa Barbara 3,101 3,964 7,065
Santa Cruz 5,879 1,732 7,611
Lawrence Berkeley 0 0 0
Lawrence Livermore 0 0 0
Los Alamos 0 0 0
Other - UC 9 892 901
Other-Network UC n/a 4,139 4,139
_______ ______ _____
38,987 29,097 68,084
1.3 Records displayed
______________________
Zero results may indicate no access to the database
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 42,328 50,929 93,257
Davis 61,316 2,243 63,559
Irvine 73,957 0 73,957
Los Angeles 82,605 101,903 184,508
Riverside 49,569 15,130 64,699
San Diego 1,867 25,939 27,806
San Francisco 20,001 4,961 24,962
Santa Barbara 30,232 46,180 76,412
Santa Cruz 58,573 21,041 79,614
Lawrence Berkeley 0 0 0
Lawrence Livermore 0 0 0
Los Alamos 0 0 0
Other - UC 28 9,223 9,251
Other-Network UC n/a 37,504 37,504
_______ ______ _____
420,476 315,053 735,529
1.4 Response time
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Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.9
Standard deviation in seconds 3.8
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 0.2
2.0 PSYCINFO Database Detailed Statistics
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Median session length (minutes:seconds) 10:31
Average session length (minutes:seconds) 15:51
Longest session recorded (minutes:seconds) 1220
Average number of searches completed per session 4.4
Retrievals per search - median 9.0
Retrievals per search - average 1185.1
Retrievals per search - standard deviation 8470.7
Percent of searches completed with 0 results 25.6%
Percent of searches entered that are long 2.5%
Percent of long searches completed
(includes partial results) 57.2%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 60,978 27.2%
DISPLAY (excluding automatic displays) 102,574 45.7%
BROWSE 236 0.1%
SELECT 77 0.0%
HELP 4,362 1.9%
EXPLAIN 4,276 1.9%
SET/RESET 3,845 1.7%
SHOW 962 0.4%
ADD ON (AND, OR, AND NOT) 7,093 3.2%
LOGON or LOGOFF 23,467 10.5%
COMMENT 5 0.0%
SAVE 9,467 4.2%
USE 41 0.0%
OTHER 7,486 3.3%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 19,884 29.6% 4,059 20.4% 15 80.6 1378.4
TITLE WORD 6,631 9.9% 2,000 30.2% 11 122.0 1767.3
EXACT TITLE 1,936 2.9% 804 41.5% 1 28.3 147.3
JOURNAL 1,991 3.0% 616 30.9% 494 3099.2 12485.0
EXACT JOURNAL 1,083 1.6% 314 29.0% 547 1666.3 2537.9
SUBJECT 8,475 12.6% 4,770 56.3% 860 6373.7 15573.8
EXACT SUBJECT 618 0.9% 345 55.8% 628 4389.4 8228.7
KEYWORD 20,467 30.5% 3,291 16.1% 64 2525.7 13924.8
FORM/PUB TYPE 295 0.4% 54 18.3% 77 2046.6 7622.0
DATE 2,929 4.4% 511 17.4% 5 94.0 1203.1
ADDED 4 0.0% 2 50.0% 2 2.0 0.0
ARTICLE 2 0.0% 0 0.0% 53 52.5 48.8
AUTHOR AFFIL. 57 0.1% 21 36.8% 10 124.3 350.8
CONFERENCE 0 0.0% 0 0.0% 0 0.0 0.0
LANGUAGE 254 0.4% 23 9.1% 61 467.3 1906.4
ISSN 1 0.0% 1 100% 0 0.0 0.0
ISBN 1 0.0% 1 100% 0 0.0 0.0
ID NUMBER 16 0.0% 16 100% 0 0.0 0.0
PERIODICAL 1,391 2.1% 377 27.1% 4 392.2 4305.0
EXACT PE 288 0.4% 56 19.4% 3 27.8 137.8
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 2 0.0% 0 0.0% 2,047 2047.0 2855.3
Other indexes 808 1.2% 142 17.6% 36 530.2 2749.2
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 6,664 11.1% 1,646 24.7% 7 228.4 3021.8
Single 53,431 88.9% 14,015 26.2% 41 1895.3 10769.8
BROWSEs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. BROWSEs No. Index Median Avg. Dev.
______ _______ ______ _______ ______ _______ _______
By index:
SUBJECT 199 84.3% 77 38.7% 2 7.5 12.4
EXACT SUBJECT 37 15.7% 22 59.5% 1 2.2 1.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.1%
SHORT 90.8%
LONG 1.0%
TAGS 0.1%
FIELDS 0.9%
BROWSE REVIEW 0.1%
BROWSE LONG 0.1%
PERIODICALS 1.7%
COMMENTS 0.0%
Other 4.3%
2.2 Error, EXPLAIN and HELP statistics
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Percent of commands that contained errors 11.3%
Ten most frequent errors:
1. First word of command is invalid 33.3%
2. NS command - no next screen 27.9%
3. FIND command with invalid index name 8.4%
4. PS command - no previous screen 5.7%
5. DISPLAY command contains invalid word 4.6%
6. Valid command at an inappropriate time 3.1%
7. Search term missing from search command 1.7%
8. DISPLAY command-record numbers too large 1.5%
9. Add-on search, no index name after verb 1.4%
10. Command contains escape or arrow key 1.2%
11. All others 11.2%
Ten most frequent EXPLAIN requests:
1. LOCATE (INS/PSY DBS) 29.6%
2. GUIDE 18.7%
3. FIND (PSY DB) 7.5%
4. COMMANDS (ABI/PSY DBS) 6.6%
5. Unrecognized term 5.4%
6. ADDON SEARCH 3.6%
7. INDEXES (PSY DB) 3.5%
8. DISPLAY (INS/PSY DBS) 3.4%
9. MAGS TEXT 1.8%
10. MAIL 1.8%
11. All others 18.2%
Ten most frequent HELP situations:
1. Help requested from SET DB command 19.1%
2. First word of command is invalid 15.4%
3. DISPLAY command-first of >1 screen 8.0%
4. FIND command with invalid index name 6.8%
5. DISPLAY command - middle of >1 screen 6.7%
6. FIND command with zero results 6.0%
7. DISPLAY command-complete in one screen 5.5%
8. FIND command retrieves >1 book 5.3%
9. DISPLAY command - last of >1 screen 3.2%
10. PS command - no previous screen 3.1%
11. All others 20.9%
Ten most frequent SHOW requests:
1. SEARCH 37.8%
2. HISTORY 33.4%
3. MAIL STATUS 13.4%
4. GLOSSARY 3.7%
5. PSYCINFO NEWS 3.5%
6. MAIL SETTINGS 2.4%
7. SETTINGS (INS/PSY DBS) 1.7%
8. SYSTEM NEWS 0.5%
9. TIMEOUT SETTING 0.5%
10. LIBRARY LOCATIONS 0.4%
11. All others 2.6%