MELVYL PSYCINFO DATABASE TELNET STATISTICS
Time period: 02/01/99 through 02/28/99
1.0 SUMMARY STATISTICS
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1.1 Total sessions:
____________________
Zero results may indicate no access to the database
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,255 1,469 2,724
Davis 1,318 55 1,373
Irvine 1,934 0 1,934
Los Angeles 1,354 2,383 3,737
Riverside 1,853 365 2,218
San Diego 91 946 1,037
San Francisco 620 25 645
Santa Barbara 840 898 1,738
Santa Cruz 1,452 444 1,896
Lawrence Berkeley 0 0 0
Lawrence Livermore 0 1 1
Los Alamos 0 0 0
Other - UC 36 292 328
Other-Network UC n/a 1,017 1,017
_______ ______ _____
10,753 7,895 18,648
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 212 1,078 11,165
2-4 a.m. 67 328 3,014
4-6 a.m. 53 161 2,452
6-8 a.m. 202 800 9,216
8-10 a.m. 1,357 5,307 51,838
10-12 a.m. 2,774 12,688 122,853
12-2 p.m. 3,671 17,875 184,414
2-4 p.m. 4,068 19,703 218,581
4-6 p.m. 2,892 13,866 160,567
6-8 p.m. 1,592 8,092 95,220
8-10 p.m. 1,094 5,543 59,611
10-12 p.m. 666 3,305 33,389
__________ __________ __________ _________________
Total: 18,648 88,746 952,320
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 5,579 6,059 11,638
Davis 5,244 241 5,485
Irvine 10,363 0 10,363
Los Angeles 7,169 11,547 18,716
Riverside 11,671 1,722 13,393
San Diego 277 3,756 4,033
San Francisco 2,364 87 2,451
Santa Barbara 3,908 3,729 7,637
Santa Cruz 7,820 1,909 9,729
Lawrence Berkeley 0 0 0
Lawrence Livermore 0 0 0
Los Alamos 0 0 0
Other - UC 91 1,219 1,310
Other-Network UC n/a 3,991 3,991
_______ ______ _____
54,486 34,260 88,746
1.3 Records displayed
______________________
Zero results may indicate no access to the database
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 61,752 68,816 130,568
Davis 46,063 1,460 47,523
Irvine 104,732 0 104,732
Los Angeles 106,911 140,726 247,637
Riverside 94,683 16,564 111,247
San Diego 1,012 34,403 35,415
San Francisco 29,098 5,467 34,565
Santa Barbara 42,170 42,339 84,509
Santa Cruz 77,518 21,301 98,819
Lawrence Berkeley 0 0 0
Lawrence Livermore 0 0 0
Los Alamos 0 0 0
Other - UC 1,661 15,096 16,757
Other-Network UC n/a 40,548 40,548
_______ ______ _____
565,600 386,720 952,320
1.4 Response time
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Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.0
Standard deviation in seconds 2.1
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 0.6
2.0 PSYCINFO Database Detailed Statistics
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Median session length (minutes:seconds) 10:45
Average session length (minutes:seconds) 16:15
Longest session recorded (minutes:seconds) 378:20
Average number of searches completed per session 4.7
Retrievals per search - median 11.0
Retrievals per search - average 1184.0
Retrievals per search - standard deviation 8747.9
Percent of searches completed with 0 results 25.5%
Percent of searches entered that are long 2.2%
Percent of long searches completed
(includes partial results) 58.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 79,040 27.3%
DISPLAY (excluding automatic displays) 133,876 46.2%
BROWSE 502 0.2%
SELECT 237 0.1%
HELP 5,322 1.8%
EXPLAIN 5,762 2.0%
SET/RESET 5,139 1.8%
SHOW 1,236 0.4%
ADD ON (AND, OR, AND NOT) 9,640 3.3%
LOGON or LOGOFF 27,882 9.6%
COMMENT 15 0.0%
SAVE 11,970 4.1%
USE 37 0.0%
OTHER 9,924 3.4%
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 25,004 29.1% 4,935 19.7% 20 80.1 260.1
TITLE WORD 8,767 10.2% 2,728 31.1% 13 147.5 1289.7
EXACT TITLE 1,919 2.2% 780 40.6% 1 32.4 168.6
JOURNAL 1,930 2.2% 560 29.0% 544 4257.5 18988.2
EXACT JOURNAL 1,362 1.6% 402 29.5% 527 2004.9 6326.0
SUBJECT 11,856 13.8% 6,646 56.1% 824 6782.5 16825.4
EXACT SUBJECT 726 0.8% 374 51.5% 758 3097.5 5941.6
KEYWORD 28,240 32.9% 4,558 16.1% 56 2199.9 13091.7
FORM/PUB TYPE 412 0.5% 64 15.5% 74 1303.7 4287.8
DATE 2,997 3.5% 510 17.0% 6 71.7 458.5
ADDED 1 0.0% 0 0.0% 80 80.0 0.0
ARTICLE 2 0.0% 1 50.0% 583 583.0 0.0
AUTHOR AFFIL. 79 0.1% 31 39.2% 35 687.9 2767.4
CONFERENCE 7 0.0% 3 42.9% 6 5.3 4.3
LANGUAGE 390 0.5% 78 20.0% 48 628.1 2179.0
ISSN 1 0.0% 1 100% 0 0.0 0.0
ISBN 1 0.0% 1 100% 0 0.0 0.0
ID NUMBER 12 0.0% 12 100% 0 0.0 0.0
PERIODICAL 1,560 1.8% 423 27.1% 4 298.5 2203.2
EXACT PE 266 0.3% 66 24.8% 3 24.7 127.0
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% 4,066 4066.0 0.0
Other indexes 420 0.5% 112 26.7% 39 676.9 2278.3
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 7,254 9.3% 1,823 25.1% 8 257.6 1987.9
Single 70,951 90.7% 18,521 26.1% 43 1857.0 10933.8
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 448 89.2% 146 32.6% 2 5.0 9.5
EXACT SUBJECT 54 10.8% 30 55.6% 1 3.5 6.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.0%
SHORT 90.3%
LONG 0.9%
TAGS 0.1%
FIELDS 0.8%
BROWSE REVIEW 0.2%
BROWSE LONG 0.1%
PERIODICALS 1.4%
COMMENTS 0.0%
Other 5.2%
2.2 Error, EXPLAIN and HELP statistics
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Percent of commands that contained errors 10.8%
Ten most frequent errors:
1. First word of command is invalid 32.8%
2. NS command - no next screen 27.9%
3. FIND command with invalid index name 8.3%
4. PS command - no previous screen 6.2%
5. DISPLAY command contains invalid word 5.0%
6. Valid command at an inappropriate time 3.1%
7. Search term missing from search command 1.8%
8. Add-on search, no index name after verb 1.5%
9. DISPLAY command-record numbers too large 1.4%
10. Command contains escape or arrow key 1.2%
11. All others 10.8%
Ten most frequent EXPLAIN requests:
1. LOCATE (INS/PSY DBS) 34.6%
2. GUIDE 17.8%
3. COMMANDS (ABI/PSY DBS) 5.8%
4. FIND (PSY DB) 5.8%
5. Unrecognized term 5.3%
6. INDEXES (PSY DB) 3.8%
7. DISPLAY (INS/PSY DBS) 3.2%
8. ADDON SEARCH 3.2%
9. MAIL 2.7%
10. MAGS TEXT 1.5%
11. All others 16.5%
Ten most frequent HELP situations:
1. Help requested from SET DB command 17.5%
2. First word of command is invalid 14.4%
3. DISPLAY command-first of >1 screen 10.1%
4. DISPLAY command - middle of >1 screen 7.0%
5. DISPLAY command-complete in one screen 6.7%
6. FIND command with invalid index name 6.4%
7. FIND command with zero results 5.9%
8. FIND command retrieves >1 book 4.8%
9. DISPLAY command - last of >1 screen 3.2%
10. NS command - no next screen 3.2%
11. All others 20.8%
Ten most frequent SHOW requests:
1. SEARCH 46.7%
2. HISTORY 33.2%
3. MAIL STATUS 6.1%
4. GLOSSARY 3.1%
5. SETTINGS (INS/PSY DBS) 2.5%
6. MAIL SETTINGS 2.1%
7. PSYCINFO NEWS 1.5%
8. DLA NEWS 1.3%
9. DISPLAY (MED/INS/PSY DBS) 0.5%
10. PUBLICATION TYPES (PSY DB) 0.3%
11. All others 2.7%