MELVYL IAC DATABASES TELNET STATISTICS
Time period: 06/01/02 through 06/30/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 133 499 632
Davis 245 0 245
Irvine 177 0 177
Los Angeles 4 166 170
Riverside 21 46 67
San Diego 89 93 182
San Francisco 57 0 57
Santa Barbara 19 47 66
Santa Cruz 18 47 65
LBL 0 35 35
LLL 0 11 11
Los Alamos n/a 0 0
Other - UC 4 62 66
Stanford 6
Other-Network UC n/a 234 234
_______ ______ _____
767 1,240 2,013
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 23 61 607
2-4 a.m. 25 103 637
4-6 a.m. 3 7 45
6-8 a.m. 46 93 609
8-10 a.m. 194 518 4,762
10-12 a.m. 375 990 13,019
12-2 p.m. 351 958 9,932
2-4 p.m. 466 1,187 19,315
4-6 p.m. 261 620 9,943
6-8 p.m. 109 246 3,027
8-10 p.m. 84 265 2,829
10-12 p.m. 76 206 2,320
__________ __________ __________ _________________
Total: 2,013 5,254 67,045
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 279 1,537 1,816
Davis 559 6 565
Irvine 435 0 435
Los Angeles 21 491 512
Riverside 76 85 161
San Diego 215 184 399
San Francisco 140 0 140
Santa Barbara 35 135 170
Santa Cruz 42 94 136
LBL 0 81 81
LLL 0 33 33
Los Alamos n/a 0 0
Other - UC 9 132 141
Stanford 22
Other-Network UC n/a 643 643
_______ ______ _____
1,811 3,421 5,254
Number of FIND commands by database
MAGS database 4,746
NEWS database 377
COMP database 131
Total number of FIND commands 5,254
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 3,364 18,694 22,058
Davis 4,990 178 5,168
Irvine 3,320 0 3,320
Los Angeles 123 11,621 11,744
Riverside 888 998 1,886
San Diego 2,968 1,741 4,709
San Francisco 1,298 0 1,298
Santa Barbara 345 957 1,302
Santa Cruz 384 1,141 1,525
LBL 0 1,095 1,095
LLL 0 1,332 1,332
Los Alamos n/a 0 0
Other - UC 65 1,449 1,514
Stanford 78
Other-Network UC n/a 9,489 9,489
_______ ______ _____
17,745 48,695 66,518
Number of Records Displayed by database:
MAGS database 62,822
NEWS database 2,864
COMP database 1,359
Total number of Records Displayed 66,518
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 88.7%
Percent of NEWS sessions 8.8%
Percent of COMP sessions 2.4%
Percent of searches done in the MAGS database 90.3%
Percent of searches done in the NEWS database 7.2%
Percent of searches done in the COMP database 2.5%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.5
Standard deviation in seconds 3.9
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 3.9
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:36
Average session length (minutes:seconds) 15:42
Longest session recorded (minutes:seconds) 579:31
Average number of searches completed per session 2.6
Retrievals per search - median 5.0
Retrievals per search - average 447.4
Retrievals per search - standard deviation 4127.6
Percent of searches completed with 0 results 29.5%
Percent of searches entered that are long 1.4%
Percent of long searches completed
(includes partial results) 56.1%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 4,481 27.3%
DISPLAY (excluding automatic displays) 6,576 40.1%
HELP 369 2.3%
EXPLAIN 248 1.5%
SET/RESET 813 5.0%
SHOW 59 0.4%
ADD ON (AND, OR, AND NOT) 265 1.6%
LOGON or LOGOFF 2,195 13.4%
COMMENT 0 0.0%
SAVE 371 2.3%
USE 4 0.0%
OTHER 1,013 6.2%
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 1,128 24.3% 317 28.1% 10 64.0 229.8
TITLE WORD 1,084 23.4% 341 31.5% 12 267.9 1894.9
EXACT TITLE 86 1.9% 38 44.2% 4 35.0 79.6
JOURNAL 208 4.5% 104 50.0% 1,037 4919.1 9944.7
EXACT JOURNAL 162 3.5% 67 41.4% 1,610 5702.3 11353.2
SUBJECT 727 15.7% 220 30.3% 24 177.2 537.9
EXACT SUBJECT 33 0.7% 13 39.4% 24 959.9 1573.3
KEYWORD 905 19.5% 235 26.0% 20 985.9 8600.8
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 9 0.2% 1 11.1% 4 2992.4 8402.4
DATE 58 1.3% 14 24.1% 83 330.1 615.5
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 112 2.4% 15 13.4% 5 142.1 1083.5
EXACT PE 79 1.7% 8 10.1% 2 36.5 137.4
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 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 43 0.9% 10 23.3% 28 2543.2 5726.5
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 171 3.8% 60 35.1% 26 1110.3 3946.2
Single 4,283 96.2% 1,262 29.5% 15 651.2 5082.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.8%
SHORT 62.1%
LONG 1.7%
FIELDS 1.2%
PERIODICALS 2.6%
COMMENTS 0.0%
Other 29.7%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 3:04
Average session length (minutes:seconds) 8:05
Longest session recorded (minutes:seconds) 46:21
Average number of searches completed per session 2.7
Retrievals per search - median 3.0
Retrievals per search - average 511.9
Retrievals per search - standard deviation 3344.0
Percent of searches completed with 0 results 30.5%
Percent of searches entered that are long 0.8%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 122 31.9%
DISPLAY (excluding automatic displays) 120 31.3%
HELP 7 1.8%
EXPLAIN 10 2.6%
SET/RESET 15 3.9%
SHOW 1 0.3%
ADD ON (AND, OR, AND NOT) 9 2.3%
LOGON or LOGOFF 72 18.8%
COMMENT 0 0.0%
SAVE 10 2.6%
USE 0 0.0%
OTHER 17 4.4%
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 17 13.3% 11 64.7% 9 14.0 17.1
TITLE WORD 25 19.5% 6 24.0% 4 248.1 916.6
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 2 1.6% 2 100% 0 0.0 0.0
EXACT JOURNAL 3 2.3% 2 66.7% 37,357 37357.0 0.0
SUBJECT 21 16.4% 9 42.9% 94 780.1 2058.2
EXACT SUBJECT 2 1.6% 1 50.0% 7 7.0 0.0
KEYWORD 34 26.6% 6 17.6% 162 499.0 728.0
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 4 3.1% 2 50.0% 7 6.5 7.8
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 11 8.6% 0 0.0% 3 12.3 26.0
EXACT PE 7 5.5% 0 0.0% 3 45.4 108.0
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 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 2 1.6% 0 0.0% 305 305.0 346.5
By number of indexes:
Multiple 6 4.9% 2 33.3% 36 155.8 264.1
Single 116 95.1% 35 30.2% 7 806.5 4234.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.9%
SHORT 50.2%
LONG 0.4%
FIELDS 0.8%
PERIODICALS 9.1%
COMMENTS 0.0%
Other 36.6%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 1,416
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 67
displays or when any of these paging options is set.
TEXT included with MAIL commands 309
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
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Median session length (minutes:seconds) 3:12
Average session length (minutes:seconds) 9:13
Longest session recorded (minutes:seconds) 63:29
Average number of searches completed per session 2.1
Retrievals per search - median 2.0
Retrievals per search - average 1679.4
Retrievals per search - standard deviation 27573
Percent of searches completed with 0 results 35.3%
Percent of searches entered that are long 0.8%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 358 33.2%
DISPLAY (excluding automatic displays) 320 29.7%
HELP 22 2.0%
EXPLAIN 12 1.1%
SET/RESET 97 9.0%
SHOW 7 0.6%
ADD ON (AND, OR, AND NOT) 19 1.8%
LOGON or LOGOFF 184 17.1%
COMMENT 0 0.0%
SAVE 4 0.4%
USE 1 0.1%
OTHER 54 5.0%
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 48 12.6% 21 43.8% 4 228.6 492.3
TITLE WORD 77 20.2% 24 31.2% 6 187.4 1018.0
EXACT TITLE 14 3.7% 10 71.4% 1 98.5 195.0
JOURNAL 4 1.0% 3 75.0% 534298 534298 0.0
EXACT JOURNAL 2 0.5% 2 100% 0 0.0 0.0
SUBJECT 86 22.6% 37 43.0% 33 461.9 1155.8
EXACT SUBJECT 1 0.3% 0 0.0% 332 332.0 0.0
KEYWORD 97 25.5% 31 32.0% 11 340.7 1342.8
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 12 3.1% 2 16.7% 28 135.2 261.4
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 31 8.1% 2 6.5% 10 22.6 31.8
EXACT PE 8 2.1% 1 12.5% 3 7.9 10.1
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 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 1 0.3% 0 0.0% 1 1.0 0.0
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 23 6.4% 5 21.7% 5 32.1 77.0
Single 335 93.6% 123 36.7% 11 2816.8 36691.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.9%
SHORT 45.1%
LONG 1.3%
FIELDS 1.9%
PERIODICALS 8.8%
COMMENTS 0.0%
Other 39.0%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 11.0%
Ten most frequent errors:
1. First word of command is invalid 36.0%
2. NS command - no next screen 26.4%
3. FIND command with invalid index name 12.9%
4. PS command - no previous screen 5.0%
5. Search term missing from search command 2.7%
6. DISPLAY command contains invalid word 2.6%
7. Valid command at an inappropriate time 2.0%
8. NS of SHOW/EXP command-no next screen 1.1%
9. DISPLAY command - no FIND results 0.8%
10. DISPLAY command-record numbers too large 0.8%
11. All others 9.8%
Ten most frequent EXPLAIN requests:
1. GUIDE 25.9%
2. LOCATE (ARTICLE DBS) 22.2%
3. FIND 12.2%
4. COMMANDS 6.3%
5. MAGS DATABASE 5.6%
6. INDEXES 4.8%
7. Unrecognized term 3.7%
8. A044 3.0%
9. DISPLAYS (IAC DBS) 3.0%
10. DATES 1.9%
11. All others 11.5%
Ten most frequent HELP situations:
1. Help requested from SET DB command 23.2%
2. First word of command is invalid 19.6%
3. FIND command with invalid index name 9.4%
4. FIND command with zero results 6.6%
5. DISPLAY command-first of >1 screen 5.7%
6. DISPLAY command - middle of >1 screen 4.9%
7. DISPLAY command-complete in one screen 4.0%
8. NS command - no next screen 3.0%
9. PS command - no previous screen 3.0%
10. FIND command retrieves >1 book 2.8%
11. All others 17.7%
Ten most frequent SHOW requests:
1. SEARCH 36.4%
2. HISTORY 27.3%
3. IAC NEWS 18.2%
4. SETTINGS (IAC DBS) 6.1%
5. SYSTEM NEWS 6.1%
6. GLOSSARY 1.5%
7. SYSTEM1 NEWS 1.5%
8. MAIL SETTINGS 1.5%
9. MAIL STATUS 1.5%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)